2431 自然歪理論を用いた有限変形解析 : 変形履歴の異なる単純剪断の予変形後に得られる降伏曲面内の異方性について(G03-8 変形・弾塑性挙動(1),G03 材料力学)

概要

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The Natural Strain proposed in this paper is obtained by integrating an infinitesimal strain increment on an identical line element. Therefore, this theory has merits that the rigid body rotation can be accurately removed from the rotating angle of a line element and the additive law of strain on an identical line element can be satisfied. By using specimens, which have already received large pre-deformations of simple shear, the relations between direction of principal axis of stress and principal axis of strain are investigated by performing proportional loading tests for tension and torsion in the elastic region. Especially, the different deformation history, i.e. the large simple shear in a certain direction and the simple shear in the opposite direction after applying in a certain direction, is chosen as pre-deformation. And, we examine whether the different deformation history influences on anisotropy of the elastic modulus G.
一般社団法人日本機械学会の論文
2007-09-07