研究者詳細 - 石原　大輔

論文 - 石原　大輔

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要素品質に基づく ALE メッシュ制御手法の開発

後藤篤史, 石原大輔, 堀江知義, 二保知也

計算力学講演会講演論文集 ( 一般社団法人日本機械学会 ) 2017 ( 0 ) 2017年01月

抵抗スポット溶接解析における構造・電流・熱伝導3連成モデルおよび微視接触電気抵抗解析モデルの検討

二保知也, 倉前宏行, 荒牧弘親, 中野陽介, 石原大輔, 堀江知義

理論応用力学講演会講演論文集 ( 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」 ) 64 ( 0 ) OS8 - 02-04 2017年01月

記述言語：日本語掲載種別：研究論文（その他学術会議資料等）

<p>Resistance spot welding is widely used in manufacturing industry. Analysis of resistance spot welding is required for examination of welding mechanism and determination of welding parameters such as weld current, electrode force and weld time because welding parameters are obtained empirically. In this paper, effect of structure–electric current–thermal conduction triply coupled model on resistance spot welding analysis results are examined to make analysis more efficient. Statistically similar representative volume element size and resolution of finite element analysis model are also discussed for microscale electrical contact resistance analysis of multiscale resistance spot welding analysis.</p>

DOI： 10.11345/japannctam.64.0_OS8-02-04

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130007510177

抵抗スポット溶接におよぼす構造・電流・熱伝導 3 連成効果の影響度

二保知也, 中野陽介, 堀江知義, 石原大輔

計算力学講演会講演論文集 ( 一般社団法人日本機械学会 ) 2017 ( 0 ) 2017年01月

Strongly Coupled Finite Element Analysis of Electric-Structure-Fluid Interaction in MEMS

Ramegowda Prakasha Chigahalli, Ishihara Daisuke, Niho Tomoya, Horie Tomoyoshi

理論応用力学講演会講演論文集 ( 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」 ) 64 ( 0 ) OS8 - 02-02 2017年01月

記述言語：英語掲載種別：研究論文（その他学術会議資料等）

<p>A strongly coupled multiphysics analysis of the electric-structure-fluid interaction in micro electro mechanical system (MEMS) using the finite element method is presented. The strongly coupled electric-structure interaction is based on the block Gauss-Seidel (BGS) iteration scheme, while the strongly coupled structure-fluid interaction is based on the projection scheme. A novel translation algorithm for the electric force and the structural displacement accurately takes into account the electric-structure interaction in MEMS. Therefore, this algorithm combines these schemes to analyze the strongly coupled electric-structure-fluid interaction in MEMS. The proposed method is applied for a flexible piezoelectric bimorph actuator in a channel to demonstrate its performance.</p>

DOI： 10.11345/japannctam.64.0_OS8-02-02

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130007510311

Fluid-structure interaction design of insect-like micro flapping wing 査読有り

Ishihara D., Ohira N., Takagi M., Murakami S., Horie T.

Proceedings of the 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017 2017-January 870 - 875 2017年01月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

© 2017 International Center for Numerical Methods in Engineering. All rights reserved. In this study, a FSI design of an insect-like micro flapping wing is proposed. Similar to actual insects, the proposed design actively uses the FSI to create the passive wing motions. Each design solution has a 2.5-D structure for the MEMS technology. The 3-D unsteady monolithic FSI equation system is solved to find the satisfactory design solutions using a projection method in a parallel computation environment. An area of satisfactory design solutions in a design parameter space or Design Window (DW) is presented. Each design solution in the present DW can generate the thrust sufficient to support the weight of the model insect. Therefore, the insect-like MEMS-based MAVs are possible.

Kyutacar

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85033477617&origin=inward

A finite element approach for a coupled numerical simulation of fluid-structure-electric interaction in MEMS 査読有り

Ramegowda P., Ishihara D., Niho T., Horie T.

Proceedings of the 7th International Conference on Coupled Problems in Science and Engineering, COUPLED PROBLEMS 2017 2017-January 999 - 1007 2017年01月

担当区分：責任著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

© 2017 International Center for Numerical Methods in Engineering. All rights reserved. In this analyze, a novel finite element coupled algorithm using numerical methods to analyze the interaction between fluid-structure-electric fileds has been presented for piezoelectric actuators. Piezoelectricity is fundamentally an interaction between structure and electric fields. In this paper, at first we analyze the piezoelectric interaction using 3D solid elements and MITC4 shell elements. Solid elements are used for electric analysis and MITC4 shell elements are used for geometric nonlinear structural analysis. The induced electric forces and moment of forces are translated from 3D solid elements to MITC4 shell elements using a novel translation method, and displacements from MITC4 shell elements are translated to 3D solid elements using shell element displacement interpolation functions. A projection method is employed in order to solve the interaction between MITC4 shell structure and fluid field.

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85045305426&origin=inward

MEMS 技術に基づく微小羽ばたき翼の変位変換システムの設計と試作

大平直人, 石原大輔, 村上直, 堀江知義

バイオエンジニアリング講演会講演論文集 ( 一般社団法人日本機械学会 ) 2017 ( 0 ) 2017年01月

A novel coupled algorithm for shell structure-electric field interaction analysis in MEMS piezoelectric actuator 査読有り

Prakasha Chigahalli Ramegowda, Daisuke Ishihara, Tomoya Niho, Tomoyoshi Horie

Proceedings of The 35th JSST Annual Conference International Conference on Simulation Technology 2016 332 - 339 2016年10月

Numerical instability of staggered electromagnetic and structural coupled analysis using time integration method with numerical damping 査読有り

T. Niho, T. Horie, J. Uefuji, D. Ishihara

Proceedings of the International Conference on Computational Methods 3 Paper ID 1962, 8pages 2016年08月

Performance evaluation of finite element coupled algorithms for structure-electric interaction analysis of MEMS actuator

Prakasha Chigahalli Ramegowda, Ishihara Daisuke, Niho Tomoya, Horie Tomoyoshi

Proceedings of the 12th World Congress on Computational Mechanics 2016年07月

Fluid-structure interaction design of micro flexible wing mimicking insect flapping flight

Daisuke Ishihara, Sunao Murakami, Masateru Araki, Tomoyoshi Horie

Proceedings of the 12th World Congress on Computational Mechanics 2016年07月

昆虫翼の受動的ピッチング運動に対する周波数比の影響

石原大輔, 白川博基, 堀江知義

計算力学講演会講演論文集 ( 一般社団法人日本機械学会 ) 2016 ( 0 ) 2016年01月

非線形有限要素解析による昆虫翼構造力学モデルの提案と検討

横田順, 石原大輔, 堀江知義

計算力学講演会講演論文集 ( 一般社団法人日本機械学会 ) 2016 ( 0 ) 2016年01月

抵抗スポット溶接時に生じる構造・電流・熱3連成現象の検討および溶接条件の設定

林尚毅, 堀江知義, 二保知也, 石原大輔

計算力学講演会講演論文集 ( 一般社団法人日本機械学会 ) 2016 ( 0 ) 2016年01月

3枚重ね抵抗スポット溶接における大変形弾塑性接触・電流・熱伝導3連成現象の検討

二保知也, 池上恭平, 堀江知義, 石原大輔, 松永賢一, 朱徳林

溶接学会全国大会講演概要 ( 一般社団法人溶接学会 ) 2016 ( 0 ) 12 - 13 2016年01月

記述言語：日本語掲載種別：研究論文（その他学術会議資料等）

3枚重ね抵抗スポット溶接では，材質や板厚により接合強度を確保し，かつ，スパッタレスな溶接条件設定が難しいケースが多い．本報では，大変形弾塑性接触・電流・熱伝導3連成解析により3枚重ね抵抗スポット溶接特有の3連成現象および溶接条件が接合強度やスパッタにおよぼす影響を検討する．

DOI： 10.14920/jwstaikai.2016f.0_12

CiNii Article

その他リンク： https://ci.nii.ac.jp/naid/130005435757

昆虫模倣翼のMEMSプロセスによる試作とその性能評価

荒木正輝，石原大輔，村上直，堀江知義

第7回マイクロ・ナノ工学シンポジウム第7回マイクロ・ナノ工学シンポジウム講演論文集 0pm1-E-5, 2pages 2015年10月

Hierarchically decomposed finite element analysis of the structure-fluid-electrostatic interaction 招待有り

Daisuke Ishihara, Tomoyoshi Horie, Tomoya Niho

Proceedings of the KSME-JSME Joint Symposium on Computational Mechanics & CAE 2015 15-231 20 - 21 2015年10月

Fluid-structure interaction analysis for the aerodynamic contribution to the passive pitching motion of dipteran flapping wings 招待有り査読有り

Daisuke Ishihara, Tomoyoshi Horie, Tomoya Niho

Proceedings of the 8th Asian-Pacific Conference on Biomechanics 66 - 66 2015年09月

Finite element analysis using a hierarchal decomposition for the interaction of structure, fluid and electrostatic field in mems 査読有り

Ishihara D., Horie T., Niho T., Baba A.

COUPLED PROBLEMS 2015 - Proceedings of the 6th International Conference on Coupled Problems in Science and Engineering 1023 - 1028 2015年04月

担当区分：筆頭著者記述言語：英語掲載種別：研究論文（国際会議プロシーディングス）

In this study, a hierarchal decomposition for the interaction of the structure, fluid and electrostatic field or the structure-fluid-electrostatic interaction, which is one of typical phenomena in micro-electro-mechanical system (MEMS), is proposed in order to solve it efficiently. The proposed decomposition partitions the structure-fluid-electrostatic interaction into the fluid-structure interaction (FSI) and the electrostatic field, and, moreover, splits the FSI into the velocity and fluid pressure fields. In this way, the whole interaction system is decomposed into the three fields in a hierarchal way. The proposed decomposition is implemented using a finite element method and is applied to a micro cantilever beam actuated by the electrostatic force in air. It follows from the comparison among the results for the structure-fluid-electrostatic interaction, the FSI and the experiment that the proposed method taking into account the full-interaction can predict the vibration characteristic of the MEMS accurately.

Kyutacar

Scopus

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84938693972&origin=inward

Elasto-plastic contact, electric current and thermal conduction triply coupled analysis model for resistance spot welding 査読有り

Niho T., Horie T., Morita Y., Ishihara D., Yamakawa D., Momii S.

Yosetsu Gakkai Ronbunshu/Quarterly Journal of the Japan Welding Society ( 一般社団法人溶接学会 ) 33 ( 3 ) 271 - 282 2015年01月

記述言語：英語掲載種別：研究論文（学術雑誌）

Interactions between elasto-plastic contact deformation, electric current and heat conduction produces complicated triply coupled effect in the resistant spot welding. Since the coupled effect affects weld strength, the coupled finite element analysis is required to determine welding parameters such as welding current, electrode force, welding time and electrode shape. This paper discusses in detail the elasto-plastic contact, electric current and thermal conduction triply coupled analysis method. The coupled analysis method uses modified electrical contact resistance model, modified thermal contact resistance model and iterative partitioned coupled algorithm suitable for strong coupled problem. The validity of the method are discussed under the different condition such as welding current, electrode force, welding time, material and number of the steel sheets. The analysis result of nugget growth curve agrees very well with experimental result for two sheet welding. The validity is confirmed by not only nugget growth curve but also surface temperature of steel sheet and electrode for three sheet welding with high tension steel. The solution convergence is discussed for the iterative partitioned coupled algorithm and the conventional coupled algorithm. Since the coupled effect is strong for between electric current and thermal conduction, the choice of the coupled algorithm is important for the resistance spot welding analysis. Effect of elasto-plastic contact deformation, change of electric current distribution and thermal conduction on resistance spot welding are discussed from the viewpoint of coupled effect. The coupled model with ability to simulate the chain of coupled effect is required to improve the analysis reliability. The importance of temperature dependency of material property, electrical contact resistance, thermal contact resistance and latent heat effect are also discussed.

DOI： 10.2207/qjjws.33.271

Scopus

CiNii Article

その他リンク： https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84983313640&origin=inward

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