A plasticity model with yield surface distortion for non proportional loading

被引：114

作者：

François, M ^{[1
]}

机构：

[1] Univ Paris 06, CNRS URA 860, LMT Cachan, F-94235 Cachan, France

来源：

INTERNATIONAL JOURNAL OF PLASTICITY | 2001年 / 17卷 / 05期

关键词：

constitutive behavior; elastic-plastic material;

D O I：

10.1016/S0749-6419(00)00025-5

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

In order to enhance the modeling of metallic materials behavior in non proportional loadings, a modification of the classical elastic-plastic models including distortion of the yield surface is proposed. The new yield criterion uses the same norm as in the classical von Mises based criteria, and a "distorted stress" S-d replacing the usual stress deviator S. The obtained yield surface is then "egg-shaped" similar to those experimentally observed and depends on only one new material parameter. The theory is built in such a way as to recover the classical one for proportional loading. An identification procedure is proposed to obtain the material parameters. Simulations and experiments are compared for a 2024 T4 aluminum alloy for both proportional and non-proportional tension-torsion loading paths. (C) 2001 Elsevier Science Ltd. All rights reserved.

引用

页码：703 / 717

页数：15

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