Fracture prediction with a material model based on stress-rate dependency related with non-associated flow rule
Fracture prediction with a material model based on stress-rate dependency related with non-associated flow rule
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DOI：
10.1051/matecconf/20168005003
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发表时间：
2016-10
期刊：
影响因子：
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通讯作者：
T. Oya;J. Yanagimoto;Koichi Ito;G. Uemura;N. Mori
中科院分区：
文献类型：
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作者：
T. Oya;J. Yanagimoto;Koichi Ito;G. Uemura;N. Mori
本文提出了一种新的各向异性金属材料模型。该模型的断裂预测是基于与非关联流动规则相关的应力-速率相关性，其中屈服势函数和塑性势函数都使用了任意阶函数。此外，还给出了与等效应力塑性功共轭的等效塑性应变增量的显式表达式。然后，利用三维局部分叉理论进行了断裂预测分析。
In this paper, a novel material model for anisotropic metals is proposed. Fracture prediction using the proposed model is based on stress-rate dependency related with non-associated flow rule in which an arbitrary order function for both the yield and plastic potential functions are used. In addition, an explicit formulation of the equivalent plastic strain increment that is plastic-work-conjugated with the equivalent stress is also presented. Then, fracture prediction analyses are conducted by using the 3D local bifurcation theory.