KEIO RESEARCHERS INFORMATION SYSTEM

Career 【 Display / hide 】

Career 【 Display / hide 】

• 1998.04

  -

  2002.03

  Tokyo Institute of Technology, Department of Mechanical and Intelligent Systems Engineering, Associate Researcher

• 2002.04

  -

  2007.03

  Tokyo Institute of Technology, Department of Mechanical and Control Engineering, Associate Researcher

• 2003.04

  -

  2007.03

  Scientific High School of Tokyo Institute of Technology, 専攻科, Lecturer

• 2007.04

  -

  2010.03

  Keio University, Department of Mechanical Engineering, Assistant Professor

• 2008.04

  -

  2009.03

  青山学院大学, 理工学部, 非常勤講師

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Academic Background 【 Display / hide 】

Academic Background 【 Display / hide 】

• 1996.03

  Tokyo Institute of Technology, Faculty of Engineering, Department of Mechanical and Production Engineering

  University, Graduated

• 1998.03

  Tokyo Institute of Technology, Graduate School, Division of Science and Engineering, Department of Mechanical and Production Engineering

  Graduate School, Completed, Master's course

Academic Degrees 【 Display / hide 】

Academic Degrees 【 Display / hide 】

• Doctor of Engineering, Tokyo Institute of Technology, Dissertation, 2005.10

Research Areas 【 Display / hide 】

Research Areas 【 Display / hide 】

• Materials/Mechanics of materials (Machine Material/Material Mechanics)

Research Keywords 【 Display / hide 】

Research Keywords 【 Display / hide 】

• Delamination

• Coating

• Interface

• Fracture

• Thin film

Books 【 Display / hide 】

Books 【 Display / hide 】

• 楽しく学ぶ　破壊力学

  成田　史生，大宮　正毅，荒木　稚子, 朝倉書店, 2020.04,  Page： 129

• Micro- and Opto-Electronic Materials and Structures: Physics, Mechanics, Design, Reliability, Packaging

  OMIYA Masaki, Kluwer Academic Publishers, 2007

• 有機／金属・無機界面のメカニズム

  OMIYA Masaki, サイエンス＆テクノロジー, 2006

  Scope: 202-211

• 金属ナノ粒子ペーストのインクジェット微細配線

  Masaki OMIYA, Kikuo KISHIMOTO, シーエムシー出版, 2006

  Scope: 227-236

• Fatigue of Materials

  OMIYA Masaki, 培風館, 2005.03

  Scope: 193-212, 277-325

Papers 【 Display / hide 】

Papers 【 Display / hide 】

• 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

  　View Summary

  © 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.

  • Access to Document (DOI)

• 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

  　View Summary

  © 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.

  • Access to Document (DOI)

• 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

  　View Summary

  © 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.

  • Access to Document (DOI)

• 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

  　View Summary

  © 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.

  • Access to Document (DOI)

• 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

  　View Summary

  © 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.

  • Access to Document (DOI)

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Papers, etc., Registered in KOARA 【 Display / hide 】

Papers, etc., Registered in KOARA 【 Display / hide 】

• Mechanical and electrochemical damage mechanism of ionic polymer metal composite actuators

  Omiya, Masaki

  科学研究費補助金研究成果報告書 2017

• Surface modification of structural steel by high temperature fine particle peening

  Omiya, Masaki

  科学研究費補助金研究成果報告書 2017

• Study on fatigue damage mechanism of Ionic Polymer Metal (IPMC) actuator

  Omiya, Masaki

  科学研究費補助金研究成果報告書 2014

• Study on interfacial strength of transparent ion polymer metal composite actuator

  Omiya, Masaki

  科学研究費補助金研究成果報告書 2009

Reviews, Commentaries, etc. 【 Display / hide 】

Reviews, Commentaries, etc. 【 Display / hide 】

• ⅩⅣ．Physics of Adhesion (4)Damage-based Cohesive Zone Model

  OMIYA Masaki

  日本接着学会誌 48 ( 2 )  2012

  Introduction and explanation (scientific journal), Single Work

Presentations 【 Display / hide 】

Presentations 【 Display / hide 】

• Influence of Electrode Young's modulus on Deformation Behavior of Ionic Polymer Metal Composite Actuator with Palladium Electrodes

  KAWAI Tomoki, OMIYA Masaki

  Asia-Pacific Conference on Fracture and Strength 2016 (APCFS2016) (Toyama, Japan) , 2016.09, Oral Presentation(general), KSME-MFD, CMES-IMME, AFG, JSME-MMD

• Measurement of Dynamic Mechanical Properties by Collision of Hard Particles

  KITA Akihiro, OMIYA Masaki, OTA shunpei and KOMOTORI Jun

  Asia-Pacific Conference on Fracture and Strength (APCFS2016) (Toyama, Japan) , 2016.09, Oral Presentation(general), KSME-MFD, CMES-IMME, AFG, JSME-MMD

• Analysis of Cable Dynamics for Ground Power Operated Gondola Type Space Elevator

  SASAKI Hidemi, OMIYA Masaki, HOSHINO Hiroaki

  The 4th Joint International Conference on Multibody System Dynamics (Montreal, Canada) , 2016.05, Oral Presentation(general)

  　View Summary

  A space elevator has been proposed as a future space transportation system. It is the concept of the space elevator to stretch a cable from the surface of the Earth by the centrifugal force of rotation, and to use it for transporting cargo into space.
  Two types of the space elevator have been proposed, based on the operation method. One is a climber type, which is operated by self-climbing carriers that are called “climber”. Second is a gondola type, which is operated by stationary power via the cable. A lot of studies about the climber type have been carried out from 1990s. By contrast, the gondola type has not been studied well, because the gondola type has disadvantages such as the requirement of high mechanical strength for power source elements.
  Therefore, in this report, we suggest Ground Power Operated Gondola Type Space Elevator, as shown in Fig.1, and consider its cable dynamics such as a method which is commonly used for the climber type. The greatest characteristic of the suggested space elevator is the circulating of the cable, which has an advantageous in maintenance of the cable.

  abstract_Analysis_of_Cable_Dynamics_for_Ground_Power_Operated_Gondola_Type_Space_Elevator.pdf

• A study on plastic ηpl approach in J and CTOD estimations for clamped SENT specimens

  Enyang wang, Masaki Omiya

  3rd International Workshops on Advances in Computational Mechanics (Tokyo, Japan) , 2015.10, Oral Presentation(guest/special), Japan Society for Computational Engineering and Science

• 破壊予測のためのシミュレーション技術

  大宮 正毅

  Mechanical Designユーザー会 (東京都) , 2015.07, Oral Presentation(guest/special), 株式会社メカニカルデザイン

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Research Projects of Competitive Funds, etc. 【 Display / hide 】

Research Projects of Competitive Funds, etc. 【 Display / hide 】

• 水素吸蔵型イオン導電性ハイブリッドアクチュエータの機械的・電気化学的特性評価

  2018.04

  -

  2021.03

  MEXT,JSPS, Grant-in-Aid for Scientific Research, 大宮　正毅, Grant-in-Aid for Scientific Research (C), Principal Investigator

• Mechanical and Electrochemical Damage Mechanism of Ionic Polymer Metal Composite Actuators

  2015.04

  -

  2018.03

  MEXT,JSPS, Grant-in-Aid for Scientific Research, 大宮　正毅, Grant-in-Aid for Scientific Research (C), Principal Investigator

Intellectual Property Rights, etc. 【 Display / hide 】

Intellectual Property Rights, etc. 【 Display / hide 】

• 最適化計算装置、最適化計算方法及びプログラム

  Application No.： 特願2018-017652  2018.02 

  Patent, Joint, National application

• 半導体集積回路の配線構造設計装置

  Application No.： 特願2014-211318  2014.10 

  Patent, Joint, National application

• 構造物荷重伝達計算装置

  Application No.： 特願2013-131205  2013.06 

  Announcement No.： 特開2015-5230  2015.01 

  Patent, Joint, National application

• 表層密着強度測定方法および装置

  Application No.： 特願2009-223824  2009.09 

  Announcement No.： 特開2011-75286  2011.04 

  Patent, Joint, National application

• 誘電経路の数値解析装置

  Application No.： 特願2009-191632  2009.08 

  Announcement No.： 特開2011-43982  2011.03 

  Patent, Joint, National application

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Awards 【 Display / hide 】

Awards 【 Display / hide 】

• 2013 Best Paper Award

  Yusuke Kai, Masaki Omiya, Yuki Kitayama, Hideyuki Kumei, Tomoaki Uchiyama, 2014.06, ASME, American Society of Mechanical Engineer, In-situ Observation of Deformation Behavior of MEA under Humidity Cycles

  Type of Award： International Academic Awards.  Country： USA

• 日本機械学会関東支部神奈川ブロック貢献賞

  2013.11, 日本機械学会関東支部神奈川ブロック

  Type of Award： Awards of National Conference, Council and Symposium.  Country： 日本

• 日本機械学会奨励賞（研究）

  OMIYA Masaki, 2007.04, 日本機械学会, 異種接着・接合界面の力学モデルの構築と界面強度評価法の研究

  Type of Award： Awards of National Conference, Council and Symposium

• Ohji-Ohtsuka-Okamura Award, Japan Society of Material Science

  OMIYA Masaki, 2006.10, 日本材料学会

  Type of Award： Awards of National Conference, Council and Symposium

• 日本材料学会学術講演優秀発表賞

  OMIYA Masaki, 2006.05, 日本材料学会

  Type of Award： Awards of National Conference, Council and Symposium

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Courses Taught 【 Display / hide 】

Courses Taught 【 Display / hide 】

• TOPICS IN MULTIDISCIPLINARY SCIENCE

  2020

• STRENGTH AND FRACTURE OF MATERIALS

  2020

• STRENGTH AND FRACTURE OF MATERIALS

  2020

• PROJECT LABORATORY IN MECHANICAL ENGINEERING

  2020

• INTRODUCTION TO MECHANICS OF MATERIALS

  2020

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Courses Previously Taught 【 Display / hide 】

Courses Previously Taught 【 Display / hide 】

• 材料強度学

  Keio University, 2016, Autumn Semester, Major subject, Lecture, Within own ｆaculty, 1h

• 形状情報の表現

  Keio University, 2016, Autumn Semester, Major subject, Laboratory work/practical work/exercise, Within own ｆaculty, 2h

• 材料と構造の強度学

  Keio University, 2016, Autumn Semester, Major subject, Lecture, 1h

• マルチディシプリナリ科学特別講義

  Keio University, 2016, Spring Semester, Major subject, Lecture

• 理工学基礎実験

  Keio University, 2016, Spring Semester, General education subject, Laboratory work/practical work/exercise, Within own ｆaculty, 2h

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Social Activities 【 Display / hide 】

Social Activities 【 Display / hide 】

• International Journal of Theoretical and Applied Multiscale Mechanics

  2009.01

  -

  Present

Memberships in Academic Societies 【 Display / hide 】

Memberships in Academic Societies 【 Display / hide 】

• 日本臨床スポーツ医学会, 

  2014.10

  -

  Present

• 日本塑性加工学会, 

  2008.04

  -

  Present

• 自動車技術会構造強度部門, 

  2008.03

  -

  Present

• 自動車技術会, 

  2007.07

  -

  Present

• Japan Society of Material Science, 

  2007.07

  -

  Present

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Committee Experiences 【 Display / hide 】

Committee Experiences 【 Display / hide 】

• 2016.05

  -

  Present

  委員, 日本材料学会企画・広報委員会

• 2016.04

  -

  Present

  委員長, 自動車技術会構造強度部門委員会

• 2016.04

  -

  2017.03

  幹事, 日本機械学会材料力学部門

• 2015.08

  講師, 日本材料学会主催　第25回初心者のための疲労設計講習会

• 2015.04

  -

  Present

  主査, 自動車技術会構造強度部門委員会き裂進展WG

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