Investigation on Elasto-Plastic Constitutive Model Coupled With Damage for Localization Phenomena
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摘要: 在已有的损伤塑性耦合本构模型基础上,进行了本构意义上的参数辨识,对不同参数取值时的材料行为进行了数值模拟,并对损伤演化律提出了改进措施.应用改进了的模型,在结构意义上进行了数值检验,模拟了简单试件拉伸时的变形局部化.数值结果表明这一理论模型有更好的数值稳定性,能较为准确地模拟金属韧性断裂的变形局部化现象.Abstract: On the basis of existing plasticity-based damage model for plasticity coupled with damage for localization analysis,constitutive parameter identification was carried out through a series of numerical tests at local level.And then improvements were made on the expressions of the evolution laws of damage'strain localization phenomena were simulated with a typical double-notched specimen under tensions.Numerical results indicate the validity of the proposed theory.
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Key words:
- damage /
- plasticity /
- localization /
- constitutive model
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