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中文摘要：
通过综合考虑沉淀动力学和动态应变时效机理，建立了一套具有明确物理内涵的唯象本构模型．并在对不同加载应变率下的单轴拉伸实验的数值模拟中，得到了3种类型的Portevin-Le Chatelier效应应力曲线．计算结果与实验数据的较好吻合，验证了该模型的有效性．
英文摘要：
By taking into account of the precipitate kinetics and the dynamic strain aging mechanism, a phenomenological model with clear physical origin is established in this paper. Three types of serrated flow in the Portevin-Le Chatelier effect is reproduced by the numerical simulations of the uniaxial tensile tests with different applied strain rates. The computational results are found in good agreement with the experimental curves, which testifies the validity of the present model.
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