1116 ラチェット変形の連続体力学シミュレーション(OS11. 材料の組織・強度に関するマルチスケールアナリシス(4),オーガナイズドセッション講演)

概要

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Recently. Ohno-wang model and Chaboche model that described mechanical ratcheting deformation have been developed. But these models don't take into consideration any distortion and rotation of subsequent yield surface. Subsequent yield surfaces, strain path and stress-strain curves have been examined experimentally for the initially isotropic 6-4 Brass subjected to mechanical ratcheting deformation. In this work, some simulation analysis were carried out based on the flow rule with yield surface including some parameters on two surface hardening rule considering both distortion and rotation of subsequent yield surface. The newly developed plastic constitutive model was presented and the reliability of the model was verified by comparing analytical results with experimental results on mechanical ratcheting deformation.
2010-09-23