Material model based on non-associated flow rule with higherorder yield function for anisotropic metals

Tetsuo Oya, Jun Yanagimoto, Koichi Ito, Gen Uemura, Naomichi Mori

研究成果: Conference article査読

12 被引用数 (Scopus)

抄録

A new expression for the plastic constitutive model for materials with initial anisotropy is proposed. A plastic strain rate tensor should be permitted to follow, to a certain extent, the rotation of the stress rate tensor, which rotates instantly from the direction of the current stress tensor as in the case of plastic instability. For this purpose, a non-associated normality model, in which the plastic potential function is defined independently of the yield function, has been adopted in the proposed model. An explicit expression for the equivalent plastic strain rate, which is plastic-work-conjugated with the defined equivalent stress corresponding to the proposed yield function, is also presented. This is important for expressing a generalized work-hardening rule for materials with plastic flow stress anisotropy. The proposed theory is expected to overcome the serious problems in the associated plastic flow theory.

本文言語English
ページ(範囲)1210-1215
ページ数6
ジャーナルProcedia Engineering
81
DOI
出版ステータスPublished - 2014
イベント11th International Conference on Technology of Plasticity, ICTP 2014 - Nagoya, Japan
継続期間: 2014 10 192014 10 24

ASJC Scopus subject areas

  • 工学(全般)

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