講演・口頭発表等 - 呉　志強

GS03 サンブナンの原理に関する一考察

有光 隆, 曽我部 雄次, 呉 志強

M&M材料力学カンファレンス  2012年9月 

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Saint-Venant's principle is generally interpreted as the rapid decay of end effects, but we know some systems where the local stress decays slowly. The whole stress field of an elastic body can be expressed as superposition of stress fields, which corresp

2-217 東アジアにおける機械設計テキストの比較((02)専門科目の講義・演習-III,口頭発表)

八木 秀次, 有光 隆, 呉 志強, 李 在勳

工学教育研究講演会講演論文集  2012年8月 

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OS1510 マイクロポーラ材料の構造設計における最適位相(OS15-2 マルチスケール解析,OS-15 微視構造を有する材料の変形と破壊)

有光 隆, 鴉 啓考, 呉 志強, 曽我部 雄次

M&M材料力学カンファレンス  2011年7月 

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The authors developed the finite element method (FEM) for micropolar elastic solids and applied it to the problem of topology optimization. The weighted residual method and 8-node isoparameteric elements were employed for the FEM analysis. The solid isotropic material with penalization (SIMP) method and the gravity control function were employed in the optimization procedure. To test the numerical solutions, the bending problem of the cantilever was used. In this analysis, the effects of the engineering material constants for micropolar elasticity, the coupling number N, which is related to stresses, and the characteristic length 1, which is related to couple stresses, are researched. The optimal structures of micropolar materials are strongly influenced by material properties of bending. Though the optimal topologies of classical elastic solids are truss frames, in general, those of micropolar materials are rigid frames. Since the checkerboard structures are more apt to appear in the optimization process for micropolar solids than in classical elasticity, filtering (the gravity control function employed in this paper) or other techniques are required to obtain practical solutions. The proposed method could potentially solve the optimization problems of biomaterials such as bone tissue.

115 マイクロポーラ弾性体の位相形態最適化(変形,一般セッション)

馬場 真大, 有光 隆, 呉 志強, 曽我部 雄次

学術講演会講演論文集  2009年5月 

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マイクロポーラ弾性体に対応した有限要素法(G.S. 応力解析・測定法,O.S.1:先進材料の力学解析と強度・機能性評価)

中野 茂行, 有光 隆, 曽我部 雄次, 呉 志強

講演論文集  2004年10月 

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434 異方性材料特性を利用した簡易位相最適化法

呉 志強, 前田 隆紀, 小嶋 伸幸, 曽我部 雄次

計算力学講演会講演論文集  2000年11月 

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15S 弾性体と弾性円板の衝突解析 : ゴルフクラブの形状最適設計へ向けて

中井 賢治, 曽我部 雄次, 有光 隆, 呉 志強

ジョイント・シンポジウム講演論文集 : スポーツ工学シンポジウム : シンポジウム:ヒューマン・ダイナミックス : symposium on sports engineering : symposium on human dynamics  2000年11月 

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The impact phenomena between golf clubs and golf balls are studied in order to examine the possibility of the shape optimization of clubs. The release velocity and side spin of the ball after impact with golf clubs, whose shapes are arbitrarily changed, are evaluated through FEM simulations. The following results are obtained from some simulations. First, the shape of the club is greatly related to the performance of the release velocity and side spin of the ball as well as the sweet area of clubs. Therefore, effectiveness of the shape optimization of the clubs is confirmed. Secondly, the kind of the club shapes having good performance is clarified from the viewpoint of mechanical energy.