CHOICE AND CALIBRATION OF CYCLIC PLASTICITY MODEL WITH REGARD TO SUBSEQUENT FATIGUE ANALYSIS
CHOICE AND CALIBRATION OF CYCLIC PLASTICITY MODEL WITH REGARD TO SUBSEQUENT FATIGUE ANALYSIS
复制标题
与后续疲劳分析有关的循环塑性模型的选择和校准
DOI：
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发表时间：
2012
期刊：
影响因子：
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通讯作者：
R. Halama
中科院分区：
文献类型：
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作者：
R. Halama
目前最流行的商用有限元软件中的塑性模型不能很好地描述非比例加载引起的多轴棘轮效应或循环硬化等循环塑性效应。例如，在不锈钢的情况下，有必要使用鲁棒的循环塑性模型。本文显示了使用新的循环塑性模型对不锈钢316 L的应力-应变行为进行有限元模拟的一些有趣结果，该模型叠加了AbdelKarim和Ohno [11]的运动硬化规则和Calloch和Marquis [14]的各向同性硬化规则。在进行模拟的基础上，进行了疲劳研究，这表明在有限元计算中的材料选择对寿命预测的准确性的影响。最后给出了对Chaboche型循环塑性模型的标定建议。
Plasticity models, included in the most popular commercial FEM software, are not able to describe well such cyclic plasticity effects as multiaxial ratcheting or cyclic hardening caused by nonproportional loading. For example in the case of stainless steels it is necessary to use a robust cyclic plasticity model. This paper shows some interesting results from FE simulations of stress-strain behaviour of stainless steel 316L using new cyclic plasticity model with superposition of the kinematic hardening rule of AbdelKarim and Ohno [11] and the isotropic hardening rule of Calloch and Marquis [14]. On the basis of performed simulations, a fatigue study has been performed, which shows the influence of material option in a FE computation on accuracy of life prediction. The conclusion presents recommendations for the calibration of cyclic plasticity models of Chaboche type.