Papers - Omiya, Masaki

Estimation of fracture behavior of CFRP/CFRP adhesively bonded joints under mixed-mode conditions using a cohesive zone model

Yousuke Kouno, Makoto Imanaka, Ryutaro Hino, Masaki Omiya & Fusahito Yoshida

Journal of Adhesion Science and Technology (Taylor & Francis)   2024.05

Research paper (scientific journal), Joint Work, Accepted

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Plastic behavior of a film type of epoxy adhesive under a wide range of stress multiaxiality conditions

Yousuke Kouno, Makoto Imanaka, Ryutaro Hino, Masaki Omiya, Fusahito Yoshida

Journal of Adhesion Science and Technology (Taylor & Francis)   2024.03

Research paper (scientific journal), Joint Work, Accepted

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Local mechanical characterization and fracture prediction modeling for resistance spot-welded joints of advanced high-strength steel

Zhenduo Yao, Masaki Omiya, Ninshu Ma, Shinnosuke Nishi, Kenji Takada, Kazuaki Okato, Kai Oide, Takaya Kobayashi, Jike Han, Kenjiro Terada

Materials Today Communications (Elsevier)  36   106787 2023.08

Research paper (scientific journal), Joint Work, Corresponding author, Accepted

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Design and fabrication of micro and nano surface structures for enhancing metal–polymer adhesion using femtosecond laser treatment

Omiya M., Nakajima A., Yan J.

Materials and Design (Materials and Design)  224 2022.12

ISSN  02641275

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This study investigated the effects of micro- and nanostructures on the adhesion strength between copper and an encapsulating mold compound (EMC). The shape of the microgrooves was designed based on fracture mechanics theory, and the effect of laser-induced periodic structure surface (LIPSS) formation on the microgroove was investigated using numerical simulations. The designed surface profiles were fabricated using femtosecond laser treatments, and the adhesion strength between copper and the EMC was evaluated. The results show that deep microgrooves improved the adhesion strength owing to the anchor effect. However, the aspect ratio between the pitch and depth of the microgroove had a limitation in enhancing the adhesion strength. The formation of LIPSSs on the mountaintop of the microgroove was very effective; however, an LIPSS on the valley of the microgroove was ineffective. Numerical analyses revealed that LIPSSs suppressed the shear deformation of the EMC and worked as resistance to interface delamination. Based on the findings obtained in this study, combining micro- and nano-scale surface structure formation with femtosecond laser treatments is an effective and eco-friendly method for improving adhesion strength.

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Effect of rubber modification on fracture toughness of epoxy adhesives under mode I and mode II loading

Makoto Imanaka, Masaki Omiya, Keisuke Hara, Hayato Nakatani

Theoretical and Applied Fracture Mechanics (Elsevier)  122   103604 2022.09

Research paper (scientific journal), Joint Work, Corresponding author, Accepted,  ISSN  01678442

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In the present study, the effects of rubber modification on the joint strength and fracture toughness of epoxy adhesives under mode I and II loading were investigated using Arcan-type adhesively bonded joints. The results of the fracture tests under mode I loading revealed the occurrence of stress whitening owing to triaxial tensile stresses near the crack tip. The joint strength and fracture toughness were calculated using the J-integral value, where the adhesive layer was considered as an elastic–plastic material. The crack-growth energy was also calculated using the J-integral value, where the adhesive layer was considered as an elastic material. The results revealed that rubber modification under mode I loading induced an increase in the joint strength, fracture toughness, and crack-growth energy. Rubber modification under mode II loading did not induce stress whitening near the crack tip owing to low triaxial tensile stresses. However, macroscopic void growth and significant plastic deformation were observed in the adhesive layer. Rubber modification induced a slight decrease in the joint strength; however, it induced a significant increase in the fracture toughness owing to the growth of the plastic zone in the adhesive layer. The calculated crack-growth energy decreased slightly, in accordance with the joint strength. It was concluded that rubber modification contributed to an increase in the crack-growth resistance under mode I loading and not under mode II loading. Furthermore, a correlation was observed between the joint strength and crack-growth energy.

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Influence of strength and notch shape on crack initiation and propagation behavior of advanced high strength steel sheets

Masaki Omiya, Seiya Arakawa, Zhenduo Yao, Mayu Muramatsu, Shinnosuke Nishi, Kenji Takada, Masanobu Murata, Kazuaki Okato, Kensuke Ogawa, Kai Oide, Takaya Kobayashi, Jike Han, Kenjiro Terada

Engineering Fracture Mechanics (Elsevier)  271   108573 2022.06

Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted,  ISSN  00137944

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Advanced high-strength steels (AHSSs) are widely adopted in car body structures to achieve weight reduction for energy efficiency and crash safety. This study investigates the effects of material strength and notch shapes on crack initiation and propagation behaviors in AHSS sheets used in car body structures. Tensile tests were conducted for three types of Japanese grade AHSS (JSC590, JSC980, and JSC1180) specimens and two notch root radii (R0.5 and R5). The crack initiation and propagation behaviors were found to strongly depend on the material strength and notch root radius. The crack generated from the notch root for the R0.5 specimens, whereas it generated from 1 to 2 mm inside the notch root for the R5 specimens. Unstable crack propagation occurred beyond the maximum load for the R5 and JSC1180 specimens, whereas only stable crack propagation occurred for the R0.5 specimens. From the digital image correlation analyses, we found that the specimen notch radius affects the stress triaxiality and equivalent plastic strain around the notch root. The JSC980 material had the highest crack initiation energy, which correlates with the plastic dissipation energy utilized for thickness reduction. The JSC590 material exhibited the highest crack propagation energy, which correlates with the true fracture strain.

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圧延方向が及ぼす薄板 Cu-Sn-P 銅合金条材の疲労き裂進展特性への影響

土屋朱美果，三田夏大，大宮正毅

日本材料学会第71期学術講演会講演論文集 (日本材料学会)  405   1 - 2 2022.05

Research paper (conference, symposium, etc.), Joint Work, Last author, Corresponding author

Evaluation of thermal fatigue crack propagation in underfill resin materials for electronic packages

Watanabe Y., Yamaguchi H., Enomoto T., Ogawa K., Kobayashi T., Omiya M.

Fatigue and Fracture of Engineering Materials and Structures (Wiley)  45 ( 5 ) 1349 - 1360 2022.05

Research paper (scientific journal), Last author, Corresponding author, Accepted,  ISSN  8756758X

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To improve the fatigue life of electronic packages, it is necessary to clarify thermal fatigue characteristics of underfill resin materials. In this study, a new setup for measuring thermal fatigue crack growth was developed, and the effects of thermal cycle conditions and silica filler contents on fatigue crack propagation were investigated. The results show that the likelihood of crack initiation increased with the filler content and the temperature of the thermal cycles. Comparing the results with those from mechanical fatigue tests, crack initiation and propagation occurred at lower ΔK and the crack growth rates were higher for thermal fatigue. Observations of the fracture surface revealed that the cracks propagated inside the underfill resin, which resulted in smaller crack growth resistance than that in mechanical fatigue. The addition of fillers introduced a crack propagation path at the interface between fillers and resins and enhanced the crack propagation resistance in thermal fatigue.

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Crack growth simulation in thin plate using simplified strain based damage model

Seo J.M., Kim Y.J., Omiya M.

Engineering Fracture Mechanics (Elsevier)  260 2022.02

Research paper (scientific journal), Joint Work, Accepted,  ISSN  00137944

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In this study, a simple strain based damage model is applied to simulate the ductile crack growth in thin 590 MPa class steel plates with notch and hole. The model depends only on the stress triaxiality and has two parameters. Determination of two parameters is straightforward by analyzing the tensile test results of flat plate specimen and plate specimen with sharp notches. The determined damage model is then applied to simulate the crack growth in other two types of test specimens containing plates with hole and notch, and a good agreement between the simulated and experimental results is obtained. It is found that the simulation results are primarily affected by the in-plane element size in the crack growth direction. On the other hand, the out-of-plane element size does not affect simulation results. It is found that the use of an in-plane element size of 0.1 mm or less is appropriate.

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Generation of micro/nano hybrid surface structures on copper by femtosecond pulsed laser irradiation

Nakajima A., Omiya M., Yan J.

Nanomanufacturing and Metrology (Nanomanufacturing and Metrology)  5 ( 3 ) 274 - 282 2022

Research paper (scientific journal), Joint Work, Accepted,  ISSN  2520811X

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The delamination of copper lead frames from epoxy molding compounds (EMC) is a severe problem for microelectronic devices, as it leads to reduced heat dissipation or circuit breakage. The micro/nanoscale surface structuring of copper is a promising method to improve the copper–EMC interfacial adhesion. In this study, the generation of micro/nano hybrid structures on copper surfaces through femtosecond pulsed laser irradiation is proposed to improve interfacial adhesion. The micro/nano hybrid structures were realized by generating nanoscale laser-induced periodic surface structures (LIPSS) on microscale parallel grooves. Several types of hybrid surface structures were generated by changing the laser polarization direction, fluence, and scanning speed. At a specific aspect ratio of microgrooves, a latticed structure was generated on the sides of microgrooves by combining LIPSS formation and direct laser interference patterning. This study provides an efficient method for the micro/nanoscale hybrid surface structure formation for interfacial adhesion improvement between copper and EMC.

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Gradient damage model for ductile fracture introducing degradation of damage hardening modulus: implementation and experimental investigations

Han J., Matsubara S., Nishi S., Takada K., Muramatsu M., Omiya M., Ogawa K., Oide K., Kobayashi T., Murata M., Moriguchi S., Terada K.

International Journal of Fracture (International Journal of Fracture)   2022

ISSN  03769429

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This study presents a gradient damage model for ductile fracture, in which the damage hardening modulus is degraded by the accumulation of plastic deformation and the volume expansion caused by negative hydrostatic pressure. The proposed model fulfills the thermodynamic requirements, and the governing equations are derived from energy minimization principles. Two parameter studies are carried out to confirm the basic performance of the proposed model, in which some typical ductile fracture responses are demonstrated by changing parameters for degrading the damage hardening modulus. Also, a series of numerical experiments are presented to reveal the ability of the proposed model to successfully simulate the fracture tests of advanced high strength steel sheets with different tensile strengths. It is indeed confirmed by the close agreement with experimental results that the proposed model is capable of realizing the breaking elongation, the transitional behavior from unstable to stable crack propagations, and the corresponding load–displacement curves. Also, the model successfully reproduces and predicts the crack initiation positions in notched specimens with different notch radii.

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薄板Cu-Sn-P銅合金条材における疲労き裂進展特性

三田夏大，大宮正毅，土屋朱美果

第20回破壊力学シンポジウム講演論文集 (日本材料学会)     17 - 22 2021.11

Research paper (conference, symposium, etc.), Corresponding author

水の電気分解を利用したパラジウム薄膜ソフトアクチュエータ

大宮正毅，黒川正人，出口早織

日本機械学会2021年度年次大会講演論文集 (日本機械学会)  S041-10   1 - 3 2021.09

Research paper (conference, symposium, etc.), Joint Work, Lead author, Last author, Corresponding author

超高張力鋼板のスポット溶接部におけるき裂発生・進展挙動解析

幺振鐸，大宮正毅

日本機械学会2021年度年次大会講演論文集 (日本機械学会)  J043-11   1 - 4 2021.09

Research paper (conference, symposium, etc.), Joint Work, Last author, Corresponding author

Improvement of experimental device for high cycle fatigue tests of copper alloy strips and characterizing fatigue properties

Natsuhiro MITA, Masaki OMIYA, Shingo WATANABE

日本機械学会論文集 (日本機械学会)  87 ( 900 ) 1 - 16 2021.07

Research paper (scientific journal), Joint Work, Accepted

自動車用高強度薄板鋼板におけるき裂進展挙動に及ぼす切欠きの影響

大宮正毅，荒川誠弥，村松眞由，西紳之介，高田賢治，小川賢介，生出佳，小林卓哉，村田真伸，岡東寿明，韓霽珂，寺田賢二郎

日本材料学会第70期学術講演会講演論文集 302   1 - 2 2021.05

Research paper (conference, symposium, etc.), Joint Work, Lead author, Corresponding author

Load transfer Ubistar(U**) calculation in structures under dynamic loading

Masaki Omiya, Kunihiro Takahashi

日本機械学会論文集 (日本機械学会)  87 ( 896 ) 1 - 12 2021.04

Research paper (scientific journal), Joint Work, Lead author, Corresponding author, Accepted

銅合金条材のための高サイクル疲労試験機の改良と疲労特性の把握

三田夏大，渡邊慎吾，大宮正毅

日本機械学会関東支部 第 27 期総会・講演会 講演論文集 (日本機械学会)  10B05   1 - 5 2021.03

Research paper (conference, symposium, etc.), Joint Work, Last author, Corresponding author

Influence of rubber content on failure mode and resistance characteristics of pc/abs blends and their abs constituents under impact

Machmud M.N.I.Z.A.R., Masaki O., Hirotsugu I., Kikuo K.

Key Engineering Materials (Key Engineering Materials)  892 KEM   67 - 73 2021

ISSN  10139826

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This present study has been re-established to investigate failure mode and resistance characteristics of the PC/ABS blends and their ABS constituents under impact for a range of rubber contents. This present study has still been experimentally performed under an instrumented-drop weight impact test (DWIT) at a room temperature. It has been finally revealed that with a particular size of rubber particle, content of rubber significantly influenced impact failure modes and impact resistances of the PC/ABS blends and their ABS constituents as well. The test results showed that impact strength of the blends was improved about 23.22% and 155.33% due to increase in content of rubber up to 15 wt% and 20 wt%, respectively. There was also found that an increase in impact toughness of the blends for 57.48% and 239.23% was due to increase in content of rubber up to 15 wt% and 20 wt%, respectively. Whilst, impact strength of the ABS was improved about 392.98% and 190.12% due to increase in content of rubber up to 15 wt% and 20 wt%, respectively. An increase in impact toughness of the ABS for 308.20% and 172.56% was due to increase in content of rubber up to 15 wt% and 20 wt%, respectively.

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Deformation mechanism of hydrogen-assisted ionic polymer metal composite actuator

Omiya M., Kurokawa M.

Mechanics of Advanced Materials and Structures (Mechanics of Advanced Materials and Structures)   2021

ISSN  15376494

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Hydrogen power sources are expected to be the main power source for a sustainable society in the future. Therefore, the development of mechanical parts or systems to adapt to the usage of hydrogen is a key issue. Ionic polymer metal composite (IPMC) actuators are composed of an electrolyte polymer membrane coated with electrodes. Owing to their light weight, flexibility, and ease of miniaturization, IPMC actuators are promising candidates for use as micro-actuators in small robots, microvalves, or artificial muscles. In this study, a hydrogen-assisted IPMC actuator is developed, and its deformation mechanism is investigated. The hydrogen absorption produced by water splitting and the hydrated cation movement in the electrolyte are the driving forces involved in this actuator. The effects of applied voltage, thickness of palladium electrodes, and length of the actuators are studied. Moreover, the contributions of bending moments by a hydrated cation movement and those by hydrogen absorption to the bending deformation are separately clarified. The results indicate that the deformation mechanism of the hydrogen-assisted IPMC actuator depends on the applied voltage, palladium-electrode thickness, and actuator length. The contribution of the hydrogen assistance decreases with the applied voltage, while that of the hydrated cation movement increases. In addition, the specimen with a shorter length exhibits a larger hydrogen-induced moment ratio. These results suggest that the hydrogen assistance to the bending deformation is more effective in IPMC actuators with a shorter and thinner palladium electrode.

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混合モード負荷下における接着継手破壊じん性値に及ぼす接着長さの影響

大宮正毅，北川絢，今中誠，河野洋輔

日本材料学会第69期学術講演会講演論文集 (日本材料学会)     1 - 2 2020.05

Research paper (conference, symposium, etc.), Joint Work, Lead author, Corresponding author

A phase-field ductile fracture model with a variable regularization length parameter

Han J., Nishi S., Takada K., Muramatsu M., Omiya M., Ogawa K., Oide K., Kobayashi T., Murata M., Moriguchi S., Terada K.

Transactions of the Japan Society for Computational Engineering and Science (Transactions of the Japan Society for Computational Engineering and Science)  2020   1 - 15 2020

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© 2020 by the Japan Society for Computational Engineering and Science. In the last decade, one of the gradient damage models called “phase-field fracture model” has been receiving attention. The model for brittle fractures has acquired great success, but that for ductile fractures is still under development. In this context, we propose a novel phase-field model with a variable regularization length parameter that is defined as an increasing function of the measure of the plastic strain. Since the regularization length parameter l representing the width of a diffuse crack is known to determine the damaged region around the crack, it has been modified so as to increase depending on the amount of plastic deformation. Thanks to this variable regularization length parameter l∗, the phase-field parameter d is calculated in consideration of the damage due to plastic deformation. The conventional elasto-plastic model with J2 theory in plasticity is employed and couple to our proposed phase-field model. Several numerical examples are conducted to demonstrate the capability of our proposed model and validate the introduction of l∗ in comparison with the experimental result.

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Role of size of rubber particles on failure mode and impact resistance characteristics of pc/abs blends and their abs constituents with a higher rubber content

M. Nizar M., Masaki O., Hirotsugu I., Kikuo K.

Defect and Diffusion Forum (Defect and Diffusion Forum)  402 DDF   1 - 6 2020

ISSN  10120386

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© 2020 Trans Tech Publications Ltd, Switzerland. This study presents an experimental study on failure modes and resistances of polycarbonate (PC)/Acrylonitrile Butadiene Styrene (ABS) blends and their ABS constituents under a drop weight impact test (DWIT). Failure modes and impact resistances such as impact strength and impact toughness of such blends are generally influenced by molecular weight of the PC, rubber content and size of rubber particle in ABS system. A preliminary study on ABS materials using a DWIT showed that size of rubber particle not only determining their failure modes but also influencing their resistance characteristics. However, in a previous study performed using the similar DWIT on PC/ABS blends with a 10 wt% rubber content, it was revealed that size of rubber particle did not significantly influence their resistances. Their failure modes were even macroscopically very difficult to be distinguished. This study, hence, is aimed to further explore role of the size of rubber particle on failure mode and impact resistance characteristics of the PC/ABS blends and their ABS constituents with a higher rubber content. The impact test results have revealed that with a 20 wt% rubber content, size of rubber particle only influenced the resistances of the PC/ABS blends. It did not significantly contribute to affect failure mode of the PC/ABS blends. Whilst, it significantly influenced failure modes and resistances of the ABS. The DWIT results also re-confirmed that blending a brittle ABS into PC led to produce a tougher PC/ABS blend.

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R-curve behavior of adhesively bonded composite joints with highly toughened epoxy adhesive under mixed mode conditions

Kouno Y., Imanaka M., Hino R., Omiya M., Yoshida F.

International Journal of Adhesion and Adhesives (International Journal of Adhesion and Adhesives)  105 2020

ISSN  01437496

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© 2020 Elsevier Ltd The fracture toughness of an adhesively bonded carbon fiber reinforced plastic joint under mixed mode (I and II) conditions was determined by means of the Fernlund–Spelt type double cantilever beam (DCB) test, where a rubber-modified epoxy adhesive was used. The R curves were determined by calculating the energy release rates, GI and GII, based on the beam theory, along with a finite element analysis. The total energy release rate GT (= GI + GII) strongly depended on the I–II mixed mode. This means that it remarkably increased with increasing mode-II component; furthermore, it varied with crack growth from GTC (at the onset of cracking) to GTS (at the steady crack-propagation region). The difference between GTC and GTS increased with the increase in the mode II component. Such R-curve characteristics were discussed based on observation of the fracture surfaces with a scanning electron microscope and the corresponding crack propagation-path behavior.

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Modelling and hydrogen-induced stress characterization of hydrogen-driven soft actuator using water splitting

Omiya M., Kurokawa M.

International Journal of Hydrogen Energy (International Journal of Hydrogen Energy)  46 ( 2 ) 2835 - 2843 2020

ISSN  03603199

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© 2020 Hydrogen Energy Publications LLC Hydrogen production by water splitting is expected to be a significant power source in future because of its cleanness and environment-friendliness. In this study, an actuator driven by hydrogen produced by water splitting is studied and a hydrogen-induced stress model for a bimorph-type hydrogen actuator is developed. From the examination of the soft actuator having electrodes made of polyvinyl chloride with palladium electrode (Pd-PVC), the stress and bending moment induced by hydrogen absorption during water splitting are quantitatively evaluated. The results show that the thickness of the palladium electrode affects the mechanical performance of the Pd-PVC actuator, with the thinner palladium electrode showing a larger bending moment and tip displacement. A simple mechano-electro-chemical coupling equation is proposed to describe the relationship between bending moment, stress, and the electric charge used for water splitting. A palladium electrode soft actuator can work as a hydrogen generator/storage mechanism and as a mechanical actuator, and it can be useful for the power source of small systems or micro- or nano-devices.

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高分子基材上のパラジウム薄膜における水素吸蔵に伴うはく離解析

大宮正毅

日本機械学会M&M2019材料力学カンファレンス講演論文集 (日本機械学会)  OS0211   1 - 4 2019.11

Research paper (conference, symposium, etc.), Single Work, Lead author, Last author, Corresponding author

画像相関法による混合モード下におけるCFRP/アルミニウム合金接着継手の破壊力学的強度評価

島本翔太，大宮正毅

日本機械学会2019年度年次大会講演論文集 (日本機械学会)  J04116P   1 - 3 2019.09

Research paper (conference, symposium, etc.), Joint Work, Last author, Corresponding author

水素吸蔵型IPMCアクチュエータの変形特性

黒川正人，大宮正毅

日本機械学会2019年度年次大会講演論文集 (日本機械学会)  S03136P   1 - 3 2019.09

Research paper (conference, symposium, etc.), Joint Work, Last author, Corresponding author

複数の3軸加速度センサを用いたトラック荷台挙動の推定

大宮正毅，梅原佑太，星野裕昭，高木雅広

日本包装学会第28回年次大会研究発表会予稿集 (日本包装学会)  b-07   130 - 131 2019.07

Research paper (conference, symposium, etc.), Joint Work, Lead author, Corresponding author

Modelling of intracranial behaviour on occiput impact in judo

Suzuki R., Omiya M., Hoshino H., Kamitani T., Miyazaki Y.

Computer Methods in Biomechanics and Biomedical Engineering (Computer Methods in Biomechanics and Biomedical Engineering)  22 ( 8 ) 797 - 805 2019.06

ISSN  10255842

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© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. Acute subdural hematoma (ASDH) sometimes occurred in judo because of the bridging veins’ failure by rotation of the brain in the skull. However, the relationship between intracranial behaviour and the motion of the body on occiput impact has not yet been clarified. In this study, we developed an intracranial mechanical model based on multibody dynamics and compared it with experimental results. The results show the importance of modelling bridging veins and cerebral spinal fluid to the relative displacement between brain and skull. The proposed model will contribute to accident analyses or the optimum design of supporting devices.

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温度サイクル下における樹脂材料の疲労き裂進展特性

大宮正毅，渡辺悠介，榎本利章，小川賢介，小林卓哉

日本材料学会第68期学術講演会講演論文集 (日本材料学会)  704   1 - 2 2019.05

Research paper (bulletin of university, research institution), Joint Work, Lead author, Corresponding author

Determination of traction-separation laws on an acrylic adhesive under shear and tensile loading

Imanaka M., Omiya M., Taguchi N.

Journal of Adhesion Science and Technology (Journal of Adhesion Science and Technology)  33 ( 6 ) 646 - 659 2019.03

ISSN  01694243

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© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. Structural acrylic adhesives are of special interest because those adhesives are cured at room temperature and can be bonded to oily substrates. To use those adhesives widely for structural bonding, it is necessary to clarify the methodology for predicting strengths of bonding structures with those adhesives. Recently, cohesive zone models (CZMs) have been receiving intensive attentions for simulation of fracture strengths of adhesive joints, especially when bonded with ductile adhesives. The traction-separation laws under mode I and mode II loadings require to estimate fracture toughness of adhesively bonded joints. In this paper, the traction-separation laws of an acrylic adhesive in mode I and mode II were directly obtained from experiments using Arcan type adhesively bonded specimens. The traction-separation laws were determined by simultaneously recording the J-integral and the opening displacements in the directions normal and tangential to the adhesive layer, respectively.

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Estimation of static strength of adhesively bonded single lap joints with an acrylic adhesive under tensile shear condition based on cohesive zone model

Imanaka M., Omiya M., Taguchi N.

Journal of Adhesion Science and Technology (Journal of Adhesion Science and Technology)  33 ( 6 ) 660 - 674 2019.03

ISSN  01694243

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© 2019, © 2019 Informa UK Limited, trading as Taylor & Francis Group. In this study, the tensile shear and bending tests of adhesively bonded single lap joints with the acrylic adhesive was evaluated experimentally and numerically. In the previous paper, the traction-separation laws in mode 1 and mode 2 for an acrylic adhesive were directly obtained from the observation of failure process using Arcan type adhesively bonded specimens: simultaneous measurements of the J-integral and the opening displacements in the directions normal, δ n and tangential to the adhesive layer, δ s respectively. The experimental results were compared with numerical simulations conducted in ABAQUS including cohesive damage model. The cohesive laws obtained in the previous paper were simplified to trapezoidal shape from the experimentally obtained ones which were indicated in the previous paper. A good agreement was found between the experimental and numerical results. Then, to investigate the damage evolution in the adhesive layer for some lap joints, microscopic video observation was conducted near the end of the adhesive layer, and the video image have been compared with the contours of damage variable obtained by FEM corresponding to the video images. The observed damage evolution also agrees with the trend of damage variable.

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Development of fast computation algorithm for load transfer Ustar (U*) calculation in structures with slidable supports

高橋邦弘，櫻井俊彰，大宮正毅，槇徹雄

日本機械学会論文集 (日本機械学会)  85 ( 870 ) 18-00374 - 12 2019.01

Research paper (scientific journal), Joint Work, Accepted

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Investigation on simplified equation for estimating J-integral of adhesive joint and its application to galvannealed steel plate⁺1

Ogawa K., Maeda R., Kobayashi T., Yokoi E., Furusawa T., Takada K., Omiya M.

Materials Transactions (Materials Transactions)  60 ( 9 ) 1928 - 1935 2019

ISSN  13459678

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© 2019 The Society of Materials Science, Japan Structural adhesives have been used to reduce weight and increase rigidity in recent automotive developments. This study focuses on the fracture behaviors of the cohesive zone under mixed-mode conditions, and a method for evaluation of the J-integral parameters using the displacement of the crack tip opening is proposed. The method is an application of the Dugdale model, which is known as an ideal model to work with a localized plasticity ahead of the crack tip. The validity of the method is verified through finite element analysis. Furthermore, the method is applied to adhesive joints on galvannealed steel, and its fracture mechanism is investigated.

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Investigation on simplified equation for estimating J-integral of adhesive joint and its application to galvannealed steel plate

Ogawa K., Maeda R., Kobayashi T., Yokoi E., Furusawa T., Takada K., Omiya M.

Zairyo/Journal of the Society of Materials Science, Japan (Zairyo/Journal of the Society of Materials Science, Japan)  67 ( 12 ) 1042 - 1049 2018.12

ISSN  05145163

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2018 The Society of Materials Science, Japan Structural adhesives are used for the purpose of weight saving and rigidity improvement in recent automotive development. In this study, fracture behaviors of a cohesive zone under mixed-mode conditions were focused on, and an evaluation method for the parameters of J-integral using the crack tip opening displacement was proposed. The method is an application of the Dugdale model which is known as an idea to deal with localized plasticity region of a crack tip for adhesive joints. Validity of the method was verified using finite element analysis. Furthermore, the method was applied for adhesive joint on galvannealed steel and its fracture mechanism was investigated.

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Optimization of Vehicle Body Local Structure Using Load Transfer Ustar(U*) Calculation

本田 正徳，秋間 総，大宮 正毅，高橋 邦弘，櫻井 俊彰，槇 徹雄，中川 興也

自動車技術会論文集 (自動車技術会)  49 ( 6 ) 1249 - 1254 2018.11

Research paper (scientific journal), Joint Work, Accepted

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Development of Theoretical Prediction Method Using Ustar (U*) for Stiffening Effect of Structures and Application to Determination of Stiffener Location for Passenger Car Bodies under Rapid Steering

高橋邦弘，依田叡門，南部佑太，櫻井俊彰，槇徹雄，大宮正毅

自動車技術会論文集 (自動車技術会)  49 ( 6 ) 1243 - 1248 2018.11

Research paper (scientific journal), Joint Work, Accepted

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Measurement of Output Force of Stacked Ionic Polymer Metal Composites (IPMC) Actuators

M. Kurokawa, M. Omiya

Proceedings of the Sixth Asian Conference on Mechanics of Functional Materials and Structures ，ACMFMS 2018    201 - 203 2018.10

Research paper (international conference proceedings), Joint Work, Last author, Corresponding author

画像相関法を利用した接着継手の破壊力学的強度評価

島本翔太，志水健人, 大宮正毅, 米山聡

日本機械学会2018年度年次大会講演論文集 (日本機械学会)  J0470304   1 - 4 2018.09

Research paper (conference, symposium, etc.), Joint Work, Corresponding author

Impact-induced fracture mechanisms of immiscible PC/ABS (50/50) blends

Machmud M., Omiya M., Inoue H., Kishimoto K.

IOP Conference Series: Materials Science and Engineering (IOP Conference Series: Materials Science and Engineering)  334 ( 1 )  2018.04

ISSN  17578981

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© Published under licence by IOP Publishing Ltd. This paper presents a study on fracture mechanisms of polycarbonate (PC)/acrylonitrile-butadiene-styrene (ABS) (50/50) blends with different ABS types under a drop weight impact test (DWIT) using a circular sheet specimen. Formation of secondary crack indicated by a stress-whitening layer on the mid-plane of scattered specimens and secondary surface of fracture perpendicular to primary fracture surface were captured under scanning electron microscope (SEM). Although the both blends finally failed in brittle modes, SEM observation showed that their secondary fracture mechanisms were completely different. Observation through the thickness of the etched PC/ABS specimen samples using SEM also clearly showed that PC and ABS were immiscible. The immiscibility between PC and ABS was indicated by presence of their layer structures through the thickness of the blends. It was revealed that layer of ABS structure was influenced by size of rubber particle and this latter parameter then affected microstructure and fracture mechanisms of the blends. Impact-induced fracture mechanisms of the blends due to such microstructures are discussed in this paper. It was also pointed out that the secondary cracking was likely caused by interface delamination between PC and ABS layers in the core due to transverse shear stress generated during the impact test.

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構造物の位相最適化における荷重伝達指標 Ustar (U*)の適用 (2) 荷重伝達U*エントロピーによる経路の明瞭化

高橋邦弘, 大宮正毅, 宮下朋之, 藤田知樹, 本田正徳

日本機械学会 IIP2018 情報・知能・精密機器部門（IIP 部門）講演会 講演論文集 (日本機械学会)  18 ( 9 ) 1B02(4pages) 2018.03

Research paper (conference, symposium, etc.), Joint Work

構造物の位相最適化における荷重伝達指標Ustar (U*)の適用，(1) 荷重伝達指標Ustar (U*) を考慮したレベルセット法

藤田知樹, 宮下朋之, 大宮正毅, 高橋邦弘, 本田正徳

日本機械学会 IIP2018 情報・知能・精密機器部門（IIP 部門）講演会 講演論文集 (日本機械学会)  18 ( 9 ) 1B01(4pages) 2018.03

Research paper (conference, symposium, etc.), Joint Work

Development of head protector for judo practice considering neck extension suppression

Takeshi KAMITANI, Natsuko ONIDANI, Masaki OMIYA, Atsuhiro KONOSU

Journal of Biomechanical Science and Engineering (The Japan Society of Mechanical Engineers)  13 ( 1 ) 1 - 11 2017.12

Research paper (scientific journal), Joint Work, Accepted,  ISSN  18809863

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© 2018 The Japan Society of Mechanical Engineers. Severe head injuries-and even deaths-have been reported in the practice of judo, often resulting from inexperience in using the appropriate falling technique (ukemi). In this study, we developed a novel head protector that protects the head and suppresses the neck extension during impact with the mat. The head protector was fabricated for this purpose and consists of a head support structure and shock-absorbing materials. The effectiveness of the head protector was tested experimentally with an apparatus with head and neck components that were based on a Hybrid III dummy. Several configurations of the support structure characteristics and the shock-absorbing materials were evaluated. The proposed head protector was capable of reducing the head angular velocity variation range-which is an important evaluation index for the onset of acute subdural hematoma -by 29% using the devices alone, by 21% using shock-absorbing materials alone, and by 47% using a combination of both. These results show that the proposed structures are highly effective in suppressing extensions at the cervical-thoracic joint (C7-T1), whereas the shock-absorbing materials are highly effective in suppressing rotations at the atlanto-occipital joint (O-C1). It is concluded that wearing the proposed head protector-which combines both effects-can reduce the risk of severe head injuries, even those resulting from severe impacts such as those associated with the judo ukemi practice.

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Comparison by stress analysis of growth period and adult elbow joint under Judo motion

Natsuko ONIDANI,Masaki OMIYA, Naomichi OGIHARA, Takeshi KAMITANI

Proceedings of 2017 INTERNATIONAL JUDO SYMPOSIUM, 5th Judo Medical and Scientific Research Conference, Tokyo  2017.12

Research paper (international conference proceedings), Joint Work

2リンクモデルを用いた柔道における頭部保護具の検討

佐々木 貴弘，大宮 正毅，星野 裕昭

日本機会学会シンポジウム：スポーツ工学・ヒューマンダイナミクス2017　講演論文集 (日本機械学会)  U0041   1 - 6 2017.11

Research paper (conference, symposium, etc.), Joint Work

柔道動作時における成長肘関節の応力解析

鬼谷奈津子，大宮正毅，荻原直道，紙谷武

日本機会学会シンポジウム：スポーツ工学・ヒューマンダイナミクス2017　講演論文集 (日本機械学会)  U0030   1 - 6 2017.11

Research paper (conference, symposium, etc.), Joint Work

On the way to the Tokyo Summer Olympic Games (2020). Prevention of severe head and neck injuries in judo: it's time for action

Kamitani T, Malliaropoulos NG, Omiya M, Otaka Y, Inoue K, Onidani N

British Journal of Sports Medicine (BMJ Publishing Group Ltd & British Association of Sport and Exercise Medicine)  51 ( 22 ) 1581 - 1582 2017.11

Research paper (scientific journal), Joint Work, Accepted

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Prediction of Shear Length in Blanking Process by Numerical Analysis

Shusuke SATO, Masaki OMIYA

Materials Science Forum (Trans Tech Publications)  920   181 - 186 2017.10

Research paper (international conference proceedings), Joint Work, Accepted,  ISSN  9783035713039

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© 2018 Trans Tech Publications, Switzerland. Blanking process has high productivity compared with other cutting processes. Because of this feature, the blanking process is used for the manufacture of automobile parts, electronic parts and so on. However, the blanking process is the process that leads to fracture. When the cutting surface are used as the functional surface, such as gears or cams, the precision of cutting surface is important and it can be improved by applying appropriate process conditions. The appropriate process conditions have been determined by repeating many experiments and this process is very inefficient. Owing to this background, the determination of the optimal process condition by numerical method such as the finite element method (FEM) is expected. In the previous studies, blanking process analyses of round blanking process which were modeled as 2D axisymmetric problem have been carried out and the cutting surface that coincided well with the experimental result was obtained. However, the blanking shape was not taken into consideration and they were not considering whether it can be applied to complicated shape expected to be applied in the future. In this study, blanking process analysis of quadrilateral blanking process was modeled as 2D plane strain problem and the applicability of various ductile fracture criteria was examined by comparing numerical results with experimental results based on shear length. As a result, there was little difference in the applicability of Cockcroft and Latham, Ayada, Brozzo ductile fracture criterion to the prediction of shear length under the current conditions.

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荷重伝達指標Ustar(U*)を用いた位相最適化

藤田知樹, 宮下朋之, 大宮正毅, 高橋邦弘

日本設計工学会2017年度秋季大会研究発表講演会講演論文集 (日本設計工学会)     71 - 74 2017.10

Research paper (conference, symposium, etc.), Joint Work

画像相関法を用いた接着継手の混合モード破壊挙動解析

志水健人，大宮正毅，米山聡

日本機械学会M&M2017材料力学カンファレンス (日本機械学会)  17-5   70 - 73 2017.10

Research paper (conference, symposium, etc.), Joint Work

数値シミュレーションを用いたせん断加工におけるせん断面長さの予測

佐藤 秀祐，大宮 正毅

日本機械学会M&M2017材料力学カンファレンス (日本機械学会)  PS05   1 - 2 2017.10

Research paper (conference, symposium, etc.), Joint Work

柔道における頭部外傷を防止するための保護具の検討

佐々木 貴弘, 大宮 正毅

日本機械学会M&M2017材料力学カンファレンス (日本機械学会)  PS06   1 - 2 2017.10

Research paper (conference, symposium, etc.), Joint Work

自動車用接着継手を対象とした混合モードJ積分の簡易評価法の検討

小川 賢介，前田 隆世，小林 卓哉，横井 栄一郎，古沢 透流，高田 賢治，大宮 正毅

計算工学講演会論文集 (日本計算工学会)  22 ( E-09-3 ) 1 - 5 2017.05

Research paper (conference, symposium, etc.), Joint Work

延性破壊条件を求めるための簡易試験片形状の検討

田原 孝浩, 大宮 正毅

日本機械学会関東支部第23期総会・講演会講演論文集 (一般社団法人日本機械学会関東支部)  OS0501-06   1 - 2 2017.03

Research paper (conference, symposium, etc.), Joint Work

頭部物理モデルを用いた柔道における後頭部衝突時の頭蓋内挙動観察実験

紙谷武，宮崎祐介，稲次基希，大宮 正毅

日本臨床スポーツ医学会誌 (日本臨床スポーツ医学会)  24 ( 3 ) 443 - 450 2016.08

Research paper (scientific journal), Joint Work, Accepted,  ISSN  1346-4159

A Proposal of Ground Power Operated Gondola Type Space Elevator

SASAKI Hidemi, OMIYA Masaki

Proceedings of The ISEC 2016 Space Elevator Conference (International Space Elevator Consortium)   2016.08

Research paper (international conference proceedings), Joint Work

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This paper shows a new operation method of the space elevator and the detailed features. This plan has considerable advantages such as being able to use electricity without restriction, however, the construction period is long and a tether with comparatively high strength is required. Then, a relation between strength of available tether and construction period will be considered.

Anion Effects on the Ion Exchange Process and the Deformation Property of Ionic Polymer Metal Composite Actuators

Wataru AOYAGI, Masaki OMIYA

Materials (MDPI)  9 ( 6 ) 479 2016.06

Research paper (scientific journal), Joint Work, Accepted

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An ionic polymer-metal composite (IPMC) actuator composed of a thin perfluorinated ionomer membrane with electrodes plated on both surfaces undergoes a large bending motion when a low electric field is applied across its thickness. Such actuators are soft, lightweight, and able to operate in solutions and thus show promise with regard to a wide range of applications, including MEMS sensors, artificial muscles, biomimetic systems, and medical devices. However, the variations induced by changing the type of anion on the device deformation properties are not well understood; therefore, the present study investigated the effects of different anions on the ion exchange process and the deformation behavior of IPMC actuators with palladium electrodes. Ion exchange was carried out in solutions incorporating various anions and the actuator tip displacement in deionized water was subsequently measured while applying a step voltage. In the step voltage response measurements, larger anions such as nitrate or sulfate led to a more pronounced tip displacement compared to that obtained with smaller anions such as hydroxide or chloride. In AC impedance measurements, larger anions generated greater ion conductivity and a larger double-layer capacitance at the cathode. Based on these mechanical and electrochemical measurements, it is concluded that the presence of larger anions in the ion exchange solution induces a greater degree of double-layer capacitance at the cathode and results in enhanced tip deformation of the IPMC actuators.

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合金化溶融亜鉛めっき鋼板における接着継手の混合モード破壊試験

大宮 正毅，中村憲一郎，前田隆世，小川賢介，小林卓哉，古沢透流，横井栄一郎，高田賢治

日本材料学会第65期学術講演会講演論文集 (日本材料学会)  No.406   97 - 98 2016.05

Research paper (scientific journal), Joint Work

後頭部衝突時における頭蓋内挙動のマルチボディダイナミクスモデル

大宮 正毅，鈴木 隆太郎，紙谷 武，星野 裕昭

日本機械学会関東支部第22期総会講演会講演論文集 (日本機械学会)  OS1302   1 - 2 2016.03

Research paper (scientific journal), Joint Work

超ハイテン材の破断に対する予測技術の研究（第２報） ―新しいせん断試験法および破断起点における局所ひずみと応力三軸度の CAE 解析―

麻寧緒，斉藤啓, 高田賢治, 長坂圭, 佐藤健太郎, 西村隆一, 徳永孝行, 西村律, 武田力紀, 岩井隆浩, 西龍, 小島宏介, 新居直樹，坂本匡史, 池田光太郎, 西浦友子，社納真一郎, 大宮正毅

自動車技術会論文集 (自動車技術会)  47 ( 2 ) 603 - 608 2016.03

Research paper (scientific journal), Joint Work, Accepted

延性破壊条件を求めるための簡易試験片形状の検討

田原孝浩，大宮 正毅

日本機械学会M&M2015材料力学カンファレンス講演論文集 (日本機械学会)  PS0039-485   1 - 2 2015.11

き裂進展を利用した割断加工シミュレーション

松本悠司，大宮 正毅

日本機械学会M&M2015材料力学カンファレンス講演論文集 (日本機械学会)  PS0037-483   1 - 2 2015.11

Research paper (scientific journal), Joint Work

化学的損傷を受けた電解質膜の機械的性質

OMIYA Masaki

日本機械学会M&M2015材料力学カンファレンス講演論文集 (日本機械学会)  PS0038-484   1 - 3 2015.11

Research paper (scientific journal), Joint Work

イオン導電性高分子アクチュエータにおける長期駆動時の変形特性

川井 朋紀，大宮 正毅

日本材料学会関東支部学生研究交流会講演概要集 (日本材料学会関東支部)  P16   1 - 2 2015.11

Research paper (scientific journal), Joint Work

二軸駆動型90°はく離試験による固体高分子形燃料電池部材における界面破壊じん性値測定

大藪 祐貴，大宮 正毅

日本材料学会関東支部学生研究交流会講演概要集 (日本材料学会関東支部)  O6   1 - 1 2015.11

Research paper (scientific journal), Joint Work

宇宙エレベーターのケーブルにおけるゆれの解析と対策方法の提案

OMIYA Masaki

日本材料学会関東支部学生研究交流会講演概要集 (日本材料学会関東支部)  P13   1 - 2 2015.11

Research paper (scientific journal), Joint Work

真空置換AIH-FPP処理システムを用いて表面窒化した工業用純チタンの表面特性評価

太田俊平,菊池将一,曙紘之,大宮 正毅,小茂鳥潤,深沢剣吾,三阪佳孝,川嵜一博

砥粒加工学会誌 59 ( 11 ) 643 - 648 2015.11

Research paper (scientific journal), Joint Work, Accepted

under Abrupt Steering and Determination of Stiffener Location by using Ustar (U*) Distribution

依田叡門，南部佑太，櫻井俊彰，槇徹雄，大宮正毅，高橋邦弘

Expression of Load Transfer in Passenger Car Body Structures (自動車技術会)  No.50-15A   1203 - 1208 2015.10

Research paper (scientific journal), Joint Work

高分子電解質膜の破壊抵抗に及ぼす温度・湿度の影響

大宮 正毅，Thibaud VERMOT DES ROCHES, 新井優樹

第17回破壊力学シンポジウム講演論文集 (日本材料学会)     109 - 111 2015.10

Research paper (scientific journal), Joint Work

Effect of environmental condition on essential work of fracture of proton exchange membranes

Thibaud VERMOT DES ROCHES, Yuki ARAI, OMIYA Masaki

Mechanical Engineering Journal (The Japan Society of Mechanical Engineers)  2 ( 5 ) 1 - 11 2015.09

Research paper (scientific journal), Joint Work, Accepted

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応力勾配下の転位挙動観察を目的とした単結晶銅ねじり試験の試み

横山 孝幸，宍戸 信之，小岩 康三，神谷 庄司，佐藤 尚，大宮 正毅，中村 友二，鈴木 貴志，野久尾 毅，鈴木 俊明

日本機械学会2015年度年次大会講演論文集 (日本機械学会)  J2210405   1 - 4 2015.09

Research paper (scientific journal), Joint Work

ショットピーニングにおける反発係数の測定と硬さ試験への応用

北 晃弘，大宮 正毅，太田 俊平，村井 一恵，小茂鳥 潤

日本機械学会2015年度年次大会講演論文集 G0300907   1 - 4 2015.09

Research paper (scientific journal), Joint Work

固体高分子形燃料電池における高分子電解質膜の化学的損傷と破壊強度

新井 優樹，佐々木 祐典，大宮 正毅

日本機械学会2015年度年次大会講演論文集 (日本機械学会)  J0320205   1 - 4 2015.09

Research paper (scientific journal), Joint Work

Investigation of continuous deformation behavior around initial yield point of single crystal copper by using micro scale torsion test

Kozo Koiwa, Nobuyuki Shishido, Chuantong Chen, Masaki Omiya, Shoji Kamiya, Hisashi Sato, Masahiro Nishida, Takashi Suzuki, Tomoji Nakamura, Toshiaki Suzuki, Takeshi Nokuo

Scripta Materialia (Elsevier)  111   94 - 97 2015.08

Research paper (scientific journal), Joint Work, Accepted

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Load transfer of passenger car compartment for improvement of structural performance in side impact

Akima, S.,Omiya, M., Takahashi, K.

The 24th International Technical Conference on the Enhanced Safety of Vehicles (ESV2015), Traffic Safety Thorough Integrated Technologies PaperNo.15-0209-O   1 - 15 2015.06

Research paper (international conference proceedings), Joint Work

超ハイテン材の破断に対する予測技術の研究－応力三軸度破断クライテリオン同定のための単純引張試験方法とFEM手法の提案－

佐藤健太郎, 岩井隆浩, 高田賢治, 新居直樹, 坂本匡史, 西龍, 福井清之, 横井龍雄, 西村隆一, 池田光太郎, 徳永孝行, 西浦友子, 社納眞一郎, 麻寧緒, 長坂圭, 西村律, 武田力紀, 小島宏介, 大宮 正毅

自動車技術会論文集 (自動車技術会)  45 ( 6 ) 1099 - 1104 2014.11

Research paper (scientific journal), Joint Work, Accepted

衝突時の動的外力を受ける乗用車車体の荷重伝達Ustar計算の自動化

秋間聡，大宮正毅，王恩揚，高橋邦弘，南部佑太，槇徹雄，櫻井俊彰， 材木裕

自動車技術会2014年秋季大会学術講演会前刷集 (自動車技術会)  129 ( 14 ) 15 - 18 2014.10

Research paper (scientific journal), Joint Work

Effect of electrode deformation by chemical reaction on IPMC actuator

TAKAGI Akifumi, OMIYA Masaki

Proceedings of Asian Conference on Mechanics of Functional Materials and Structures  2014.10

Research paper (international conference proceedings), Joint Work

樹脂部品の衝突CAE予測精度向上への取り組み（第２報）

西原剛史，増田出光，高木崇，小林督矢，篠原一彦，田中康規，大宮正毅，横山敦士

自動車技術会2014年秋季学術講演会前刷集 (自動車技術会)  No.111-14   9 - 12 2014.10

Research paper (scientific journal), Joint Work

樹脂部品の衝突CAE予測精度向上への取り組み（第1報）

小野仁幹，前博行，近藤智和，伊藤敬一，小林卓哉，佐藤維美，村田真伸，一ノ瀬規世，山本健太郎，大宮正毅，横山敦士

自動車技術会2014年秋季学術講演会前刷集 (自動車技術会)  No.111-14   5 - 8 2014.10

Research paper (scientific journal), Joint Work

Specimen size effect on elastic–plastic strength evaluation of interface between thin films

Chuantong Chen, Kozo Koiwa, Nobuyuki Shishido, Shoji Kamiya, Masaki Omiya, Hisashi Sato, Masahiro Nishida, Takashi Suzuki, Tomoji Nakamura, Takeshi Nokuo, Tadahiro Nagasawa

Engineering Fracture Mechanics (Elsevier)  131   371 - 381 2014.09

Research paper (scientific journal), Joint Work, Accepted

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In Situ Observation of Deformation Behavior of Membrane Electrode Assembly Under Humidity Cycles

KAI Yusuke, KITAYAMA Yuki, OMIYA Masaki, UCHIYAMA Tomoyuki, KUMEI Hideyuki

Journal of Fuel Cell Science and Technology (ASME)  11   051006-1 - 051006-7 2014.08

Research paper (scientific journal), Joint Work, Accepted

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Local distribution of residual stress of Cu in LSI interconnect

Hisashi Sato, Nobuyuki Shishido, Shoji Kamiya, Kozo Koiwa, Masaki Omiya, Masahiro Nishida, Takashi Suzuki, Tomoji Nakamura, Takeshi Nokuo

Materials Letters 136   362 - 365 2014.08

Research paper (scientific journal), Joint Work, Accepted

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Evaluation for interface strength fluctualtions induced by inhomogeneous grain structure of Cu line in LSI interconnects

Chuantong Chen, Nobuyuki Shishido, Shoji Kamiya, Kozo Koiwa, Hisashi Sato, Masaki Omiya, Masahiro Nishida, Takashi Suzuki, Tomoji Nakamura, Takeshi Nokuo, Toshiaki Suzuki

Microelectronic Engineering 120   52 - 58 2014.05

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Crystal orientation effect on local adhesion strength of the interface between a damascene copper line and the insulation layer

Nobuyuki Shishido, Yuka Oura, Hisashi Sato, Shoji Kamiya, Kozo Koiwa, Masaki Omiya, Masahiro Nishida, Takashi Suzuki, Tomoji Nakamura, Takeshi Nokuo, Toshiaki Suzuki

Microelectronic Engineering 120   71 - 76 2014.05

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Experimental investigation of motion analysis during back break falls in judo - a problematic point for beginners' ukemi-

KAMITANI Takeshi, MISHIMA Shinji, SONODA Masaki, OKADA Sachiko, OMIYA Masaki

Japanese Journal of Clinical Sports Medicine (一般社団法人　日本臨床スポーツ医学会)  22 ( 2 ) 325 - 330 2014.04

Joint Work, Accepted,  ISSN  1346-4159

医師の立場からみた柔道による脳および脊髄障害の事故予防対策

KAMITANI Takeshi, MISHIMA Shinji, SONODA Masaki, OKADA Sachiko, OMIYA Masaki

Japanese Journal of Clinical Sports Medicine (一般社団法人　日本臨床スポーツ医学会)  22 ( 2 ) 265 - 267 2014.04

Joint Work, Accepted,  ISSN  1346-4159

Relation between Statistical Load Transfer Ustar Index and Vehicle Body Stiffness

Yuta Nambu, Taisuke Mizuno, Kunihiro Takahashi, Masaki Omiya, Yuta Urushiyama, Masashi Naito, Hirokazu Kobayashi, Tetuo Maki, Toshiaki Sakurai

自動車技術会論文集 (Society of Automobile Engineers of Japan)  45 ( 2 ) 343 - 348 2014.03

Research paper (scientific journal), Joint Work, Accepted

Modelling of Particle Behaviour in Shot Peening Process

Yuki Kato, Masaki Omiya, Hiroaki Hoshino

Journal of Mechanical Engineering and Automation 4 ( 3 ) 83 - 91 2014

Research paper (scientific journal), Joint Work, Accepted,  ISSN  2163-2405

• Access to Document (DOI)

Observation of particle behavior in Fine Particle Peening Process

Yusuke AIBA, Kazue Murai, Masaki OMIYA, Jun KOMOTORI

Proceedings of the ICP-12, 12th International Conference on Shot Peening    445 - 449 2014

Research paper (international conference proceedings), Joint Work

Load Transfer Ustar (U*) Calculation in Structures under Dynamic Loading

Kunihiro Takahashi, Masaki Omiya, Tomoyuki Iso, Yutaka Zaiki, Toshiaki Sakurai, Tetsuo Maki, Yuta Urushiyama, Tadashi Naito

日本機械学会論文集（A編） (The Japan Society of Mechanical Engineers)  79 ( 807 ) 103 - 114 2013.11

Accepted

超ハイテン材の破断に対する予測技術の研究（第4報）

徳永孝行, 高田賢治, 坂本匡史, 社納真一郎, 麻寧緒, 長坂圭, 西村律, 武田力紀, 大宮正毅

自動車技術会２０１３年秋季大会学術講演会前刷集 (公益社団法人　自動車技術会)  141 ( 13 ) 21-24 2013.10

Research paper (conference, symposium, etc.), Joint Work

荷重伝達Ustar計算に基づく統計量と乗用車車体剛性との関連

南部佑太, 水野泰介, 高橋邦弘, 大宮正毅, 漆山雄太, 内藤正志, 小林広和, 槇徹雄, 櫻井俊彰

日本自動車技術会２０１３年秋季大会学術講演前刷集 (公益社団法人　日本自動車技術会)  130 ( 13 ) 1-6 2013.10

Research paper (conference, symposium, etc.), Joint Work

超ハイテン材の破断に対する予測技術の研究（第3報）

西村隆一, 高田賢治, 新居直樹, 佐藤健太郎, 西龍, 池田光太郎, 岩井隆浩, 小島宏介, 大宮正毅

自動車技術会２０１３年秋季大会学術講演会前刷集 (公益社団法人　自動車技術会)  141 ( 13 ) 17-20 2013.10

Research paper (conference, symposium, etc.), Single Work

Failure Prediction for Membrane Electrode Assembly

Thibaud VERMOT DES ROCHES, OMIYA Masaki

Journal of Computational Science and Technology (JSME)  7 ( 2 ) 221 - 230 2013.06

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

超ハイテン材の破断に対する予測技術の研究（第2報）

岩井隆浩, 高田賢治, 坂本匡史, 西浦友子, 麻寧緒, 長坂圭, 西村律, 武田力紀, 小島宏介, 大宮正毅

自動車技術会２０１３年春季大会学術講演会前刷集 (公益社団法人　自動車技術会)  38 ( 13 ) 5-8 2013.05

Research paper (conference, symposium, etc.), Joint Work

超ハイテン材の破断に対する予測技術の研究（第１報）

佐藤健太郎, 高田賢治, 新居直樹, 西龍, 横井龍雄, 福井清之, 西村隆一, 池田光太郎, 徳永孝行, 大宮正毅

自動車技術会２０１３年春季大会学術講演会前刷集 (公益社団法人　自動車技術会)  38 ( 13 ) 1-4 2013.05

Research paper (conference, symposium, etc.), Joint Work

Development of Cu/Insulation Layer Interface Crack Extension Simulation with Crystal Plasticity

Kozo Koiwa, Masaki Omiya, Nobuyuki Shishido, Shoji Kamiya, Hisashi Sato, Masahiro Nishida, Takashi Suzuki, Tomoji Nakamura, Toshiaki Suzuki, Takeshi Nokuo

Japanese Journal of Applied Physics (The Japan Society of Applied Physics)  52   04CB05-1 - 04CB05-7 2013.04

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Mechanical and electrochemical properties of an IPMC actuator with palladium electrodes in acid and alkaline solutions

AOYAGI Wataru, OMIYA Masaki

Smart Materials and Structures (IOP Publishing)  22 ( 5 ) 055028 2013.04

Research paper (scientific journal), Joint Work, Accepted

• Access to Document (DOI)

Crack formation in Membrane Electrode Assembly Under Static and Cyclic Loadings

KAI Yusuke, KITAYAMA Yuki, OMIYA Masaki, UCHIYAMA Tomoyuki, KATO Manabu

Journal of Fuel Cell Science and Technology (ASME)  10   021007-1-8 2013.04

Research paper (scientific journal), Joint Work, Accepted

Experimental and numerical evaluation of interfacial adhesion on Cu/SiN in LSI interconnect structures

OMIYA Masaki, KOIWA Kozo, SHISHIDO Nobuyuki,KAMIYA Shoji, CHEN Chuantong, SATO Hisashi, NISHIDA Masahiro, SUZUKI Takashi, NAKAMURA Tomoji, SUZUKI Toshiaki, NOKUO Takeshi

Microelectronics Reliability (Elsevier)  53 ( 4 ) 612 - 621 2013.04

Research paper (scientific journal), Joint Work, Accepted

　View Summary

The local interfacial strength is a key factor in designing and fabricating advanced three-dimensional large-scale integration interconnect structures. In this paper, both local fracture tests and three-dimensional elastic–plastic crack propagation analysis for a 10 μm × 10 μm specimen were performed, and the local interfacial adhesion between a Cu interconnect and a SiN cap layer were evaluated. The three-dimensional elastic–plastic crack propagation simulation was developed to evaluate the interfacial adhesion that eliminated the effect of progressive plastic dissipation energy during crack propagation. The results show that the average interfacial adhesion for Cu/SiN is 4.46 ± 0.17 J/m2. The crack propagation behavior and fracture pattern depend on the interfacial adhesion, and these differences are due to the plastic yielding of the side edge of the specimen. The critical interfacial adhesion for the onset of shear fracture is 4.92 J/m^2, which is the upper bound of the interfacial adhesion evaluation for the 10 μm × 10 μm specimen.

Specimen Size Effect of Interface Strength Distribution Induced by Grain Structure of Cu Line

CHEN Chuantong, SHISHIDO Nobuyuki, KOIWA Kozo, KAMIYA Shoji, SATO Hisashi, NISHIDA Masahiro, OMIYA Masaki, SUZUKI Takashi, NAKAMURA Tomoji, SUZUKI Toshiaki, NOKUO Takeshi

日本機械学会論文集（A 編）ノート (日本機械学会)  79 ( 799 ) 354-358 2013.03

Research paper (scientific journal), Joint Work, Accepted

柔道における後頭衝突時の急性硬膜下血種発生評価指標の比較と頭部保護の効果

AIBA Kazuki, OMIYA Masaki, ITEYA Misaki, KAMITANI Takeshi, TOMATSU Taisuke

日本機械学会論文集A編 (日本機械学会)  78 ( 796 ) 1631 - 1641 2012.12

Research paper (scientific journal), Joint Work, Accepted

固体高分子形燃料電池のイオン交換膜・電極接合体の疲労特性

KITAYAMA Yuki, KAI Yusuke, OMIYA Masaki

第31回疲労シンポジウム講演論文集 (日本材料学会疲労部門委員会)     196-197 2012.11

Research paper (conference, symposium, etc.), Joint Work

ショットピーニングにおける疲労強度特性向上の予測

KATO Yuki, OMIYA Masaki, HOSHINO Hiroaki

第31回疲労シンポジウム講演論文集 (日本材料学会疲労部門委員会)     11 - 15 2012.11

Research paper (conference, symposium, etc.), Joint Work

後頭部衝突時における頭部外傷の発生防止に対する衝撃緩和材の効果

SUZUKI Ryutaro, OMIYA Masaki

シンポジウム：スポーツ・アンド・ヒューマンダイナミクス2012 (日本機械学会)     469-472 2012.11

Research paper (conference, symposium, etc.), Joint Work

Effect of Molding Condition on the Compressive Properties of PLA-PBAT Blend Materials

GUSHIKEN Tomohiko, OMIYA Masaki

ISEM-ACEM-SEM-7thISEM'12 (National Tsing Hua University, Taiwan Society for Experimental Mechanics, U. S. A. Asian Society of Experimental Mechanics Japanese Society for Experimental Mechanics)     A152 2012.11

Research paper (conference, symposium, etc.), Joint Work

Characteristics of Ionic Polymer Metal Composite Actuator in several pH solutions

AOYAGI Wataru, OMIYA Masaki

ISEM-ACEM-SEM-7thISEM'12 (National Tsing Hua University, Taiwan Society for Experimental Mechanics, U. S. A. Asian Society of Experimental Mechanics Japanese Society for Experimental Mechanics)     F108 2012.11

Research paper (conference, symposium, etc.), Joint Work

Grain-scale adhesion strength mapping of copper wiring structures in integrated circuits

Shoji Kamiya, Nobuyuki Shishido, Shinsuke Watanabe, Hisashi Sato, Kozo Koiwa, Masaki Omiya, Masahiro Nishida, Takashi Suzuki, Tomoji Nakamura, Takeshi Nokuo, Tadahiro Nagasawa

Surface and Coatings Technology (Elsevier)  215 ( 25 ) 280 - 284 2012.11

Research paper (scientific journal), Joint Work, Accepted

ナノ構造を有するTiO2薄膜

FUJIWARA Keisuke, OMIYA Masaki

第56回日本学術会議材料工学連合講演会講演論文集 (日本学術会議材料工学委員会)     367-368 2012.10

Research paper (conference, symposium, etc.), Joint Work

構造物の荷重経路U*解析と乗用車車体における伝達荷重分担のバランス

OMIYA Masaki

日本機械学会集A編 (日本機械学会)  78 ( 794 ) 1462 - 1472 2012.10

Research paper (scientific journal), Joint Work, Accepted

　View Summary

The authors investigate the overall structural balance of stiffness from the viewpoint of load transfer and load paths. The concept of load transfer balance is examined and graphically expressed using U*. Index U* is a new concept introduced by the authors to express load transfer in structures. The load transfer balance is calculated for an automotive body structure under conditions of vertical loading on the front suspension. The load transfer balance of a body affects the drivability of an automobile. Through the use of figures showing the U* distribution along load transfer paths, the balance of load transfer is clearly expressed. From these figures, it is shown that frontal load is mainly transferred to the lower structure rather than to the upper structure in the vehicle body used in this study. Diagrams and histograms for U*sum, which is the summation of two kinds of U*s, are presented in this study to show the load transfer balance more precisely. These figures show that the transition of load transfer balance to the lower structure is caused by the stiffened support effect near the rear supporting points.

ナノ構造体を形成した層間絶縁膜の機械的特性の評価

MAENO Ryota, FUJII Toshiki, OMIYA Masaki

M&M2012カンファレンス (日本機械学会)     OS1906(2pp) 2012.09

Research paper (conference, symposium, etc.), Joint Work

Failure Prediction for Membrane Electrode Assembly

VERMOT DES ROCHES Thibaud, OMIYA Masaki

M&M2012カンファレンス (日本機械学会)     OS0620(2pp) 2012.09

Research paper (conference, symposium, etc.), Joint Work

柔道における急性硬膜下血種発生評価指標の比較と頭部保護具の効果

OMIYA Masaki

日本機械学会2012年度年次大会講演論文集 (日本機械学会)     J021014(4pp) 2012.09

Research paper (conference, symposium, etc.), Joint Work

イオン導電性高分子アクチュエータの変形挙動に関するpH特性

AOYAGI Wataru, OMIYA Masaki

日本機械学会2012年度年次大会講演論文集 (日本機械学会)     J044111(5pp) 2012.09

Research paper (conference, symposium, etc.), Joint Work

Deformation behaviors of ionic-polymer–metal composite actuator with palladium electrodes for various solvents, temperatures, and frequencies

KOBAYASHI Takuma, OMIYA Masaki

Smart Materials and Structures (IOP Publishing)  21 ( 10 ) 105031 2012.08

Research paper (scientific journal), Joint Work, Accepted

　View Summary

An ionic-polymer–metal composite (IPMC) actuator with palladium electrodes was fabricated by non-electrolytic plating. It is cheaper and lighter than actuators with electrodes made from conventional materials such as gold and platinum. The deformation properties of the IPMC actuator were evaluated and its bending response was found to increase with increasing ionic radius of the cation. The solvent temperature affects the deformation speed, but not the maximum curvature. The IPMC actuator exhibits a good response at frequencies below its resonant frequency. The resonant frequency was reasonably estimated by a cantilever beam model. The generative mechanical power increased with both the effective length and the width of IPMC actuator. To increase the mechanical power, making longer IPMC actuators is more efficient than making wider IPMC actuators.

Multibody Dynamics Modeling of Particle Behaviors in Shot Peening Process

KATO Yuki, OMIYA Masaki, HOSHINO Hiroaki

The 6th Asian Conference on Multibody Dynamics (Shanghai Jiao Tong University)   2012.08

Research paper (conference, symposium, etc.), Joint Work

破壊力学研究の最新動向

OMIYA Masaki

日本機械学会誌 (日本機械学会)  115 ( 1125 ) 16-17 2012.08

Research paper (other academic), Single Work

後頭部衝突時における頭蓋内挙動のモデル化

鈴木隆太郎，相場一希，小畑智笑子，大宮正毅

第61回理論応用力学講演会 (日本学術会議　機械工学委員会，土木工学・建築学委員会合同IUTAM分科会)     OS15-22 2012.03

Research paper (conference, symposium, etc.), Joint Work

粒子飛翔シミュレーションを用いたショットピーニング処理における残留応力予測

加藤 祐貴，大宮 正毅，小茂鳥 潤，星野 裕昭

第62回塑性加工連合講演会講演論文集 (日本塑性加工学会)     529-530 2011.10

Research paper (conference, symposium, etc.), Joint Work

せん断荷重下における接着界面のき裂進展解析

大宮 正毅，原田 壮章，北山 祐希，神谷 庄司，宍戸 信之

第24回計算力学講演会 (日本機械学会計算力学部門)     30-31 2011.10

Research paper (conference, symposium, etc.), Joint Work

集積回路配線用銅薄膜の付着強度評価における試験片寸法の効果

宍戸 信之，陳 傳彤，神谷 庄司，大宮 正毅，佐藤 尚，西田 政弘，鈴木 貴志，中村 友二，野久尾 毅，長澤 忠広

第24回計算力学講演会 (日本機械学会計算力学部門)     9-11 2011.10

Research paper (conference, symposium, etc.), Joint Work

SEM中インデンタによるサブミクロンスケール付着強度評価

宍戸信之，陳傳彤，神谷庄司，大宮正毅，佐藤尚，西田正弘，野久尾毅，長澤忠広，鈴木貴志，中村友二

日本実験力学会講演論文集 (日本実験力学会)     91-92 2011.08

Research paper (conference, symposium, etc.), Joint Work

発泡PLA/PBATブレンド材の圧縮特性評価

OMIYA Masaki, YAMAMURA Toshitaka

日本実験力学会講演論文集 (日本実験力学会)     237-238 2011.08

Research paper (conference, symposium, etc.), Joint Work

半導体デバイス配線構造における局所付着強度分布の統計的評価の試み

陳傳彤，宍戸信之，松本悟，神谷庄司，佐藤尚，西田正弘，大宮正毅，鈴木貴志，中村友二，長澤忠広，野久尾毅

M&M2011材料力学カンファレンス (日本機械学会材料力学部門)     OS2406 2011.07

Research paper (conference, symposium, etc.), Joint Work

ショットピーニングにおける粒子飛翔挙動および表面改質効果の数値解析

加藤 祐貴, 大宮 正毅, 小茂鳥 潤

M&M2011材料力学カンファレンス (日本機械学会材料力学部門)     PS04 2011.07

Research paper (conference, symposium, etc.), Joint Work

せん断押込み試験による接着界面のき裂成長

KITAYAMA Yuki, OMIYA Masaki

M&M2011材料力学カンファレンス (日本機械学会材料力学部門)     PS12 2011.07

Research paper (conference, symposium, etc.), Joint Work

INTERFACE TOUGHNESS EVALUATION WITH SPECIMENS FABRICATED BY FOCUSED ION BEAM FOR MICRO SCALE DEVICES AND PACKAGES

SHSHIDO Nobuyuki, MATSUMOTO Satoru, CHEN Chuantong, SATO Hisashi, OMIYA Masaki, KAMIYA Shoji, NISHIDA Masahiro, NOKUO Takeshi, NAGASAWA Tadahiro, SUZUKI Takashi, NAKAMURA Tomoji

ASME 2011 Pacific Rim Technical Conference & Exposition on Packaging and Integration of Electronic and Photonic Systems (InterPACK2011) (Americal Society of Mechanical Engineer)     IPACK2011-52270 2011.07

Research paper (conference, symposium, etc.), Joint Work

IONIC POLYMER METAL COMPOSITE (IPMC) FOR MEMS ACTUATOR AND SENSOR

YANAMORI Hiroyuki, KOBAYASHI Takuma, OMIYA Masaki

ASME 2011 Pacific Rim Technical Conference & Exposition on Packaging and Integration of Electronic and Photonic Systems (InterPACK2011) (American Society of Mechanical Engineer)     IPACK2011-52259 2011.07

Research paper (conference, symposium, etc.), Single Work, Accepted

微小切削装置を利用したプリント基板上における銅薄膜の界面強度評価

OMIYA Masaki, NISHIYAMA Itsuo

日本機械学会論文集A編 (日本機械学会)  77 ( 778 ) 790 - 799 2011.06

Research paper (scientific journal), Joint Work, Accepted

薄膜付着界面の切削はく離

OMIYA Masaki

第60回理論応用力学講演会 (日本学術会議　機械工学委員会，土木工学・建築学委員会合同IUTAM分科会)   2011.03

Research paper (conference, symposium, etc.), Joint Work

Frequency response of IPMC actuator with palladium electrode

KOBAYASHI Takuma, OMIYA Masaki

SPIE Smart Structures/NDE (The International Society for Optics and Photonics)   2011.03

Research paper (conference, symposium, etc.), Joint Work

A Study on Properties of Ionic Polymer Metal Composite

KOBAYASHI Takuma, OMIYA Masaki

Advanced Materials Research 143-144   394-398 2011

Research paper (scientific journal), Joint Work, Accepted

Empirical Equations for a Study on Strain Rate Sensitivity of Polypropylene Syntactic Foam

Enyang Wang, OMIYA Masaki

Advanced Materials Research 143-144   303-307 2011

Research paper (scientific journal), Joint Work, Accepted

A Microscopic Study on Local Strain Rate Sensitivity of Polypropylene Syntactic Foam with Microballoons

WANG Engyang, OMIYA Masaki

Advanced Materials Research 160-162   1280-1284 2011

Research paper (scientific journal), Joint Work, Accepted

Effect of Hardness Ratio on Plastic Dissipation in Fine Particle Peening

OMIYA Masaki, KIKUCHI Shoichi, HIROTA Yo, KOMOTORI Jun

Journal of Solid Mechanics and Materials Engineering 4 ( 10 ) 1585-1594 2010.11

Research paper (conference, symposium, etc.), Joint Work, Accepted

Deformation Behavior of IPMC Actuator under Various Solvents, Temperatures and Frequencies

KOBAYASHI Takuma, OMIYA Masaki

5th International Symposium on Advanced Science and Technology in Experimental Mechanics (Japanese Society of Experimental Mechanics)   2010.11

Research paper (conference, symposium, etc.), Joint Work, Accepted

Evaluation of Compressive Properties of Porous PLA

YAMAMURA Toshitaka, OMIYA Masaki

The 5th International Symposium on Advanced Science and Technology in Experimental Mechanics (Japanese Society of Experimental Mechanics)   2010.11

Research paper (conference, symposium, etc.), Joint Work, Accepted

切削原理を利用した薄膜界面強度評価

ISHII Daisuke, OMIYA Masaki, HOSHINO Hiroaki

第54回日本学術会議材料工学連合講演会 (日本学術会議材料工学連合)     225-226 2010.10

Research paper (conference, symposium, etc.), Joint Work

LSI配線におけるナノコイル型絶縁膜

FUJII Toshiki, OMIYA Masaki

第54回日本学術会議材料工学連合講演会 (日本学術会議材料工学連合)     306-307 2010.10

Research paper (conference, symposium, etc.), Joint Work

蛍光ナノ粒子を用いた放射線センシング機能を有する軽量耐熱服の研究開発

OMIYA Masaki

第58回全国消防技術者会議 (総務省消防庁消防大学校　消防研究センター)     224-223 2010.10

Research paper (conference, symposium, etc.), Joint Work

LSI配線におけるナノコイル型絶縁膜

FUJII Toshiki, OMIYA Masaki

日本材料学会関東支部学生研究交流会講演論文集 (日本材料学会関東支部)     3-4 2010.10

Research paper (conference, symposium, etc.), Joint Work

ショットピーニングにおける粒子挙動の数値シミュレーション

KATOU Yuuki, OMIYA Masaki

日本材料学会関東支部学生研究交流会講演論文集 (日本材料学会関東支部)     19-20 2010.10

Research paper (conference, symposium, etc.), Joint Work

半導体デバイスのき裂進展シミュレーション

HARADA Akinori, OMIYA Masaki

日本材料学会関東支部学生研究交流会講演論文集 (日本材料学会関東支部)     27-28 2010.10

Research paper (conference, symposium, etc.), Joint Work

切削原理を利用した界面強度評価

ISHII Daisuke, OMIYA Masaki

M&M2010 材料力学カンファレンス (日本機械学会材料力学部門)     157-159 2010.10

Research paper (conference, symposium, etc.), Joint Work

ポーラス樹脂材料の三軸圧縮特性評価

ANDO Yusuke, OMIYA Masaki

M&M2010 材料力学カンファレンス (日本機械学会材料力学部門)     155-156 2010.10

Research paper (conference, symposium, etc.), Joint Work

A comparative study of a new microscale technique and conventinal bending techniques for evaluating the interface adhesion strength in IC metallization systems

KAMIYA Shoji, SHIMOMURA Hiroshi, OMIYA Masaki, SUZUKI Takashi

Journal of Material Research 25 ( 10 ) 1917-1928 2010.10

Research paper (scientific journal), Joint Work, Accepted

集積回路中の配線用銅薄膜界面に対する付着強度の評価

OMIYA Masaki

日本機械学会2010年度年次大会 (日本機械学会)   2010.09

Research paper (conference, symposium, etc.), Joint Work

イオン導電性高分子アクチュエータの機能特性評価

KOBAYASHI Takuma, OMIYA Masaki

日本機械学会2010年度年次大会 (日本機械学会)  8   21-22 2010.09

Research paper (conference, symposium, etc.), Joint Work

Contribution of plastic dissipation to interfacial adhesion in IC metallization systems

OMIYA Masaki, KAMIYA S., SHIMOMURA H., SUZUKI, T.

Proceedings of 18th European Conference on Fracture (European Structural Integrity Society (ESIS))   2010.09

Research paper (conference, symposium, etc.), Joint Work

Characterization of a bonding-in-liquid technique for liquid encapsulation into MEMS devices

Yoshiyuki Okayama, Keijiro Nakahara, Xavier Arouette, Takeshi Ninomiya, Yasuaki Matsumoto, Yoshinori Orimo, Atsushi Hotta, Masaki Omiya and Norihisa Miki

Journal of Micromechanics and Microengineering 20   095018-1~6 2010.08

Research paper (scientific journal), Joint Work, Accepted

Material Design for Porous Low-k Dielectrics by Genetic Algorithm (GA) and U* Analyses

Shunsuke Miyagawa, OMIYA Masaki

Journal of Solid Mechanics and Materials Engineering 4 ( 6 ) 700-710 2010.06

Research paper (scientific journal), Joint Work, Accepted

多孔質材料の損傷・破壊シミュレーションと材料設計

OMIYA Masaki

日本材料学会第133回破壊力学部門委員会 (日本材料学会破壊力学部門委員会)     7-14 2010.05

Research paper (conference, symposium, etc.), Single Work

Damage-Based Cohesive Zone Model for Rate-Depend Interfacial Fracture

OMIYA Masaki, Kikuo Kishimoto

International Journal of Damage Mechanics 19 ( 5 ) 397-420 2010.05

Research paper (scientific journal), Joint Work, Accepted

Extension of U* to Electrostatic Problem and Its Application to Pore Arrangements for Porous Low-k and High-k Dielectric Film

Shunsuke Miyagawa, OMIYA Masaki, Kunihiro Takahashi

Journal of Solid Mechanics and Materials Engineering 4 ( 3 ) 414-425 2010.03

Research paper (scientific journal), Joint Work, Accepted

Photoluminescence of Cubic and Monoclinic Gd2O3:Eu Phosphors Prepared by Flame Spray Pyrolysis

Yasuo Iwako, Yuki Akimoto, Masaki Omiya, Toshihisa Ueda, Takeshi Yokomori

Journal of Luminescence 130 ( 8 ) 1470-1474 2010.03

Research paper (scientific journal), Joint Work, Accepted

Effect of Hardness Ratio on Plastic Dissipation in Fine Particle Peening

Masaki OMIYA, Shoichi KIKUCHI, Yo HIROTA, Jun KOMOTORI

Proceedings of the 2010 M&M International Symposium for Young Researchers (JSME MMD/California Institute of Technology)   2010.02

Research paper (conference, symposium, etc.), Joint Work

Micro-scale Evaluation of Interface Strength on the Patterned Structures in LSI Interconnects

Shoji Kamiya, Hisashi Sato, Masahiro Nishida, Chuantong Chen, Nobuyuki Shishido, Masaki Omiya, Takashi Suzuki, Tomoji Nakamura, Takeshi Nokuo, Tadahiro Nagasawa

AIP conference proceedings 1300   33-38 2010

Research paper (conference, symposium, etc.), Joint Work, Accepted

Evaluation of Actuation Behavior of Ionic Polymer Metal Composite

KOBAYASHI Takuma, YANAMORI Yiroki, OMIYA Masaki

Proceedings of Asian Pacific Conference for Materials and Mechanics 2009 (JSME MMD)   2009.11

Research paper (conference, symposium, etc.), Joint Work

Effects of Pore Arrangement on the Properties of Low-k Dielectrics

MIYAGAWA Shunsuke, OMIYA Masaki

Proceedings of Asian Pacific Conference for Materials and Mechanics 2009 (JSME MMD)   2009.11

Research paper (conference, symposium, etc.), Joint Work

Evaluation of Interfacial Strength with Micro Cutting System

OMIYA Masaki, NISHIYAMA Itsuo

Proceedings of Asian Pacific Conference for Materials and Mechanics 2009 (JSME MMD)   2009.11

Research paper (conference, symposium, etc.), Joint Work

Evaluation of Compressive Properties of PLA/PBAT Polymer Blends

YAMAMURA Toshitaka, OMIYA Masaki, SAKAI Takenobu, Pilippe VIOT

Proceedings of Asian Pacific Conference for Materials and Mechanics 2009 (JSME MMD)   2009.11

Research paper (conference, symposium, etc.), Joint Work

微小切削装置を利用した薄膜付着強度評価

OMIYA Masaki, NISHIYAMA Itsuo

日本材料学会第14回破壊力学シンポジウム講演論文集 (日本材料学会)     35-39 2009.10

Research paper (conference, symposium, etc.), Joint Work

種々の環境下におけるイオン導電性高分子アクチュエータの変形特性

M. Omiya，T. Kuribayashi, T. Kobayashi

日本機械学会2009年度年次大会講演論文集 (日本機械学会)  8   23-24 2009.09

Research paper (conference, symposium, etc.), Joint Work

Extension of U* to Electro-Static Problem and its application to Structural Design for Porous Low-k Dielectric Film

MIYAGAWA Shunsuke, OMIYA Masaki, TAKAHASHI Kunihiro

日本機械学会論文集A編 (日本機械学会)  75 ( 756 )  2009.08

Research paper (scientific journal), Joint Work, Accepted

ポリ乳酸ブレンド材の圧縮特性評価

YAMAMURA Toshitaka, OMIYA Masaki, SAKAI Takenobu, Philippe VIOT

日本実験力学会講演論文集 (日本実験力学会)     151-156 2009.08

Research paper (conference, symposium, etc.), Joint Work

イオン導電性高分子アクチュエータの機能特性評価

T. Kobayashi, T. Kuribayashi, M. Omiya

日本機械学会M&M2009材料力学カンファレンスCD-ROM論文集 (日本機械学会)     473-475 2009.07

Research paper (conference, symposium, etc.), Joint Work

層間絶縁膜の機能特性に及ぼす空孔配置の影響

MIYAGAWA Shunsuke, OMIYA Masaki

日本機械学会M&M2009材料力学カンファレンスCD-ROM論文集 (日本機械学会)   2009.07

Research paper (conference, symposium, etc.), Joint Work

ポリ乳酸ブレンド材の圧縮特性評価

YAMAMURA Toshitaka, OMIYA Masaki，SAKAI Takenobu, Philippe VIOT

日本機械学会M&M2009材料力学カンファレンスCD-ROM論文集 (日本機械学会)   2009.07

Research paper (conference, symposium, etc.), Joint Work

ろう付け継手の接合界面端における弾塑性応力特異場

OMIYA Masaki, MORIYAMA Yuta

日本材料学会第58期学術講演会講演論文集 (日本材料学会)     75-76 2009.05

Research paper (conference, symposium, etc.), Joint Work

Fabrication of Ionic Polymer Metal Composite Actuator with palladium electrodes and Evaluation of its Bending Response

T. Kobayashi, T. Kuribayashi, M. Omiya

Material Research Society Symposium Proceedings (Materials Research Society)  1190   NN11-29-1-6 2009

Research paper (conference, symposium, etc.), Joint Work

Material ductility and toughening mechanism of polypropylene blended with bimodal distributed particle size of styrene-ethylene-butadiene-styrene tri-block copolymer at high strain rate

H. Mae, M. Omiya, K. Kishimoto

Journal of Applied Polymer Science 110 ( 6 ) 3941-3953 2008.12

Research paper (scientific journal), Joint Work, Accepted

A novel evaluation method for interfacial adhesion strength in ductile dissimilar materials

Shoji Kamiya, Harunori Furuta, Masaki Omiya, Hiroshi Shimomura

Engineering Fracture Mechanics 75 ( 18 ) 5007-5017 2008.12

Research paper (scientific journal), Joint Work, Accepted

Comparison of mechanical properties of PP/SEBS blends at intermediate and high strain rates: with SiO2 nanoparticles vs. with CaCO3 fillers

H. Mae, M. Omiya, K. Kishimoto

Journal of Applied Polymer Science 110 ( 2 ) 1145-1157 2008.10

Research paper (scientific journal), Joint Work, Accepted

Effect of Nickel Pad Metallization Thickness on Fatigue Failure of BGA Lead-free Solder Joints

Masaki Omiya, Takeshi Miyazaki, Kikuo Kishimoto, Masazumi Amagai

IEEE Transactions on Components and Packaging Technologies 31 ( 3 ) 734-740 2008.09

Research paper (scientific journal), Joint Work, Accepted

ポーラス構造の導入によるCu配線層間絶縁膜の誘電率と剛性への影響

宮川隼輔，大宮 正毅

日本機械学会2008年度年次大会 (日本機械学会)  6   305-306 2008.08

Research paper (conference, symposium, etc.), Joint Work

配線用銅薄膜材料の付着強度評価における塑性変形とモード比の効果

OMIYA Masaki

第13回LSI配線における原子輸送・応力問題研究会  2008.07

Research paper (conference, symposium, etc.), Joint Work

High deformation rate and failure characteristics of amorphous polymers and their blends

M.N. Machmud, D. Mochizuki,M. Omiya, H. Inoue and K. Kishimoto

Materials Science and Engineering: A 483-484   242-244 2008.06

Research paper (scientific journal), Joint Work, Accepted

Evaluation of the Interfacial Strength of Layered Structures by the Indentation Method

M.Omiya, K.Kishimoto, T.Nakano

Transactions of ASME, Journal of Applied Mechanics 75   031006-1~031006-6 2008.05

Research paper (scientific journal), Joint Work, Accepted

多孔質構造を有する低誘電率層間絶縁膜の有限要素解析

OMIYA Masaki

日本機械学会関東学生会第47回学生員卒業研究発表講演会  2008.03

Research paper (conference, symposium, etc.), Joint Work

Effect of total rubber content on ductility of polypropylene blended with bimodal distribution of styrene-ethylene-butadiene-styrene particle size

H. Mae, M. Omiya, K. Kishimoto

Journal of the Society of Materials Science, Japan 57 ( 9 )  2008

Research paper (scientific journal), Joint Work, Accepted

Effects of strain rate and density on tensile behavior of polypropylene syntactic foam with polymer microballoons

Hiroyuki MAE, Masaki OMIYA, Kikuo KISHIMOTO

Materials Science and Engineering: A 477   168-179 2008

Research paper (scientific journal), Joint Work, Accepted

直交異方性損傷モデルを用いた押出アルミニウム部材の圧潰解析

前博行, 大宮 正毅, 岸本喜久雄

計算数理工学論文集 7 ( 2 ) 203-206 2008

Research paper (conference, symposium, etc.), Joint Work, Accepted

Effect of micro porous shape on mechanical properties in polypropylene syntactic foams

H. Mae,OMIYA Masaki, K. Kishimoto

Journal of Solid Mechanics and Materials Engineering 2 ( 5 ) 616-635 2008

Research paper (scientific journal), Joint Work, Accepted

Tensile stress strain behavior of polypropylene toughened with bi-modal SEBS

H. Mae, M. Omiya, K. Kishimoto

International Journal of Modern Physics B 22   1129-1134 2008

Research paper (scientific journal), Joint Work, Accepted

Influence of SiO2 nanoparticles on mechanical properties of PP/SEBS blends at intermediate and high strain rates

H. Mae, M. Omiya, K. Kishimoto

Journal of Solid Mechanics and Materials Engineering 2 ( 2 ) 254-268 2008

Research paper (scientific journal), Joint Work, Accepted

Microstructural Observation and Simulation of Micro Damage Evolution of Ternary Polypropylene Blend with Ethylene-Propylene-Rubber (EPR) and Talc

Hiroyuki MAE, Masaki OMIYA, Kikuo KISHIMOTO

Journal of Solid Mechanics and Materials Engineering 2 ( 8 ) 1018-1036 2008

Research paper (scientific journal), Joint Work, Accepted

Effects of strain rate and relaxation rate on elastic modulus of semi-crystalline polymer

H. Mae, M. Omiya, K. Kishimoto

Transaction of the Japan Society for Computational Methods in Engineering 7 ( 2 ) 207-212 2008

Research paper (conference, symposium, etc.), Joint Work, Accepted

Tensile behavior of polypropylene blended with bimodal distribution of styrene-ethylene-butadiene-styrene particle size

H. Mae, M. Omiya, K. Kishimoto

Journal of Applied Polymer Science 107 ( 6 ) 3520-3528 2008

Research paper (scientific journal), Joint Work, Accepted

粗視化分子動力学を用いた高分子系接着剤のはく離解析

大宮正毅，篠崎明，井上裕嗣，岸本喜久雄

日本機械学会第20回計算力学講演会 (日本機械学会計算力学部門)   2007.11

Research paper (conference, symposium, etc.), Joint Work

Study on Fatigue Strength Characteristics of Solder Joints

Daisuke Kaneko, Kikuo Kishimoto, Masaki Omiya, Masazumi Amagai

The 9th International Symposium on Electric Materials and Packaging (IEEE CPMT)   2007.11

Research paper (conference, symposium, etc.), Single Work

Numerical Simulations for the Transmission Characteristics of Polymer-based Optical Wave-guide

Masaki Omiya, Akira Shinozaki, Kikuo Kishimoto

The 9th International Symposium on Electronic Materials and Packaging (IEEE CPMT)   2007.11

Research paper (conference, symposium, etc.), Joint Work

紫外線照射を受けたGFRPの機械的特性に関する研究

早房 敬祐，工藤 大，大谷 俊博，森永 滋，大宮 正毅，井上 裕嗣，岸本 喜久雄

M&M2007材料力学カンファレンス (日本機械学会材料力学部門)   2007.10

Research paper (conference, symposium, etc.), Joint Work

ITO薄膜のき裂形成に及ぼすPET基材の塑性変形の影響

大宮 正毅, 岸本 喜久雄

M&M2007材料力学カンファレンス (日本機械学会)   2007.10

Research paper (conference, symposium, etc.), Joint Work

マイクロバルーンブレンドPPにおける局所ひずみ速度と密度の引張挙動への影響

前 博行，大宮　正毅，岸本　喜久雄

M&M2007材料力学カンファレンス (日本機械学会)   2007.10

Research paper (conference, symposium, etc.), Joint Work

Nano-Indentation approach to interfacial strength evaluation

Masaki Omiya, Kentaro Kozuki, Kikuo Kishimoto and Hirotsugu Inoue

International Conference on Advanced Technology in Experimental Mechanics 2007 (The Japan Society of Mechanical Engineers)   2007.09

Research paper (conference, symposium, etc.), Joint Work, Accepted

Study of Delamination of Thin Film Coating on Cyclic Nano-Indentation Test

K.Kozuki, M.Omiya, K.Kishimoto, H.Inoue

Key Engineering Materials 353-358   1842-1845 2007

Research paper (scientific journal), Joint Work, Accepted

Adhesion Energy of Cu/Polyimide Interface in Flexible Printed Circuits

Shoji Kamiya, Harunori Furuta, Masaki OMIYA

Surface & Coatings Technology 202   1084-1088 2007

Research paper (scientific journal), Joint Work, Accepted

Effect of Peel Rate on Interfacial Strength

Ryota MASUDA, Masaki OMIYA, Hirotsugu INOUE, Kikuo KISHIMOTO

Key Engineering Materials 345-346   185-188 2007

Research paper (scientific journal), Joint Work, Accepted

Deformation and failure behaviors of PC/ABS (50/50) blends under impact

Machmud M. Nizar, Omiya Masaki, Inoue Hirotsugu, Kishimoto Kikuo

Key Engineering Materials 340-341   319-324 2007

Research paper (scientific journal), Joint Work, Accepted

配線用銅薄膜界面に対する付着強度評価法の検討

下村紘志, 神谷庄司, 大宮正毅, 鈴木貴志

日本機械学会2007年度年次大会 (日本機械学会)   2007

Research paper (conference, symposium, etc.), Joint Work

Mechanical Parameters Characterizing Interface Crack and Interface Strength Evaluation Testing

Kikuo Kishimoto, OMIYA Masaki, Kentaro Kozuki

日本接着学会誌 43 ( 11 ) 443-451 2007

Research paper (scientific journal), Single Work, Accepted

Compressive Deformatino in Aluminum Foam Investigated Using a 2D Object Oriented Finite Element Modeling Approach

M.F. Adziman, S. Deshpande, M. OMIYA, H. Inoue, K. Kishimoto

Key Engineering Materials 353-358   651-654 2007

Research paper (conference, symposium, etc.), Joint Work, Accepted

Crack Formation of Ceramic Thin Film on Polymer Substrate

M. Omiya, K. Kishimoto

Key Engineering Materials 353-358   307-310 2007

Research paper (scientific journal), Joint Work, Accepted

Effect of Ni Plating Thickness on Fatigue Failure of Lead-Free Solder Joints

Masaki Oomiya, Takeshi Miyazaki, Hirotsugu Inoue, Kikuo Kishimoto, Masazumi Amagai

8th International Conference on Electronics Materials and Packaging (EMAP2006) (IEEE CPMT)   2006.12

Research paper (conference, symposium, etc.), Joint Work

分子鎖ネットワークを用いた高分子材料の剥離と押し込み解析

OMIYA Masaki

計算数理工学論文集 (計算数理工学会)  6 ( 3 ) 147-152 2006.12

Research paper (scientific journal), Joint Work, Accepted

高分子基材上におけるセラミックス薄膜のき裂形成に及ぼす紫外線の影響

Masaki OMIYA, Kikuo KISHIMOTO

材料 (日本材料学会)  55 ( 12 ) 1081-1087 2006.12

Research paper (scientific journal), Joint Work, Accepted

A Phenomenological Constitutive Model Constructed for PC/ABS Blends

M.Nizar Machmud, Masaki Omiya, Hirotsugu Inoue, Kikuo Kishimoto

Key Engineering Materials 306-308   989-994 2006.03

Research paper (scientific journal), Joint Work, Accepted

Fracture of Brittle Thin Film on Polymer Substrate

M.Omiya and K.Kishimoto

Theoretical and Applied Mechanics Japan 54   93-99 2005

Research paper (scientific journal), Joint Work, Accepted

Modeling of a Gc-sensing element for the interfacial toughness of metal thin films on substrates

Insu Jeon, Masaki Omiya, Kikuo Kishimoto, Tadashi Asahina, Seyoung Im

Sensors and Actuators A: Physical 122   291-300 2005

Research paper (scientific journal), Joint Work, Accepted

UV-Irradiation Effects on Interfacial Strength between Thin Ceramic Film and Polymer substrate

Masaki Omiya, Hirotsugu Inoue, Kikuo Kishimoto, Masaaki Yanaka and Noritaka Ihashi

Key Engineering Materials 297-300   2284-2289 2005

Research paper (scientific journal), Single Work, Accepted

A New Specimen for Measuring the Interfacial Toughness of Al-0.5%Cu Thin Film on Si Substrate

I. Jeon, Masaki Omiya, Hirotsugu Inoue, Kikuo Kishimoto, T. Asahina

Key Engineering Materials 297-300   521-526 2005

Research paper (scientific journal), Joint Work, Accepted

Impact Behavior Analysis of PC/ABS (50/50) Blends

M. Nizar Machmud, Masaki Omiya, Hirotsugu Inoue, Kikuo Kishimoto

Key Engineering Materials 297-300   1297-1302 2005

Research paper (scientific journal), Joint Work, Accepted

Evaluation of Interfacial Strength by Multi-stages Peel Test

M.Omiya, H.Inoue and K.Kishimoto

Key Engineering Materials 261-263   483-488 2004

Research paper (scientific journal), Joint Work, Accepted

Effects of Meso-scale Structure and Interactions on Macro-scale Mechanical Properties in Polymeric Materials

A.Shinozaki, M.Omiya, H.Inoue and K.Kishimoto

Key Engineering Materials 261-263   747-752 2004

Research paper (scientific journal), Joint Work, Accepted

高分子フィルム上に形成したぜい性薄膜の界面付着強度評価

OMIYA Masaki

材料 (日本材料学会)  53   856-861 2004

Research paper (scientific journal), Joint Work, Accepted

A Key Matrix N^ for the Stress Singularity of the Anisotropic Elastic Composite Wedges

Chanbin Hwu, Masaki Omiya, Kikuo Kishimoto,

JSME International Journal Series A (日本機械学会)  46   40-50 2003

Research paper (scientific journal), Joint Work, Accepted

Interface Debonding Model and its application to the Mixed Mode Interface Fracture Toughness

M. Omiya, K. Kishimoto and W. Yang

International Journal of Damage Mechanics 11   263-286 2002

Research paper (scientific journal), Joint Work, Accepted

Fracture Mechanics of Bonding Interface – A Cohesive Zone Model -

K. Kishimoto, M. Omiya, W. Yang

Sensors and actuators, A Physical 99   198-206 2002

Research paper (scientific journal), Joint Work, Accepted

Strength evaluation of notch structure for semiconductor encapsulant resin

Kawamura N, Kawakami T, Kishimoto K, Omiya M, Shibuya T

Transactions of ASME, Journal of Electronic Packaging 124   323-327 2002

Research paper (scientific journal), Joint Work, Accepted

Mechanical Characterization of Sn-Ag-based lead-free solders

Masazumi Amagai, Masako Watanabe, Masaki Omiya, Kikuo Kishimoto and Toshikazu Shibuya

Microelectronics Reliability 42   951-966 2002

Research paper (scientific journal), Joint Work, Accepted

界面結合力モデルを用いた界面破壊基準の検討Vol.51 (2002), pp.1367-1372.

OMIYA Masaki

材料 (日本材料学会)  51   1367-1372 2002

Research paper (scientific journal), Joint Work, Accepted

Sn-Ag-Cu系鉛フリーはんだの機械的特性

OMIYA Masaki

エレクトロニクス実装学会誌 (エレクトロニクス実装学会)  5 ( 6 ) 551-558 2002

Research paper (scientific journal), Joint Work, Accepted

Effect of intermetallic compound layer development on interfacial strength of solder joints

Omiya, Masaki, Kishimoto, Kikuo, Shibuya, Toshikazu and Amagai, Masazumi,

Advances in Electronic Packaging 2   1157-1164 2001

Research paper (scientific journal), Joint Work, Accepted

結合力モデルを用いた異材界面き裂の有限要素解析

OMIYA Masaki

日本機械学会論文集(A編), Vol.66 (2000), pp.532-539. (日本機械学会)  66   532-539 2000

Research paper (scientific journal), Joint Work, Accepted

The Influence of Plastic Deformation on Interface Fracture Behavior

M. Omiya, K. Kishimoto and T. Shibuya

Key Engineering Materials 183-187   541-546 2000

Research paper (scientific journal), Joint Work, Accepted