Experimental characterization, material modeling, identification and finite element simulation of the thermo-mechanical behavior of a zinc die-casting alloy
Experimental characterization, material modeling, identification and finite element simulation of the thermo-mechanical behavior of a zinc die-casting alloy
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DOI：
10.1016/j.ijplas.2017.10.010
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发表时间：
2018-02
影响因子：
9.8
通讯作者：
M. A. Page;S. Hartmann
中科院分区：
文献类型：
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作者：
M. A. Page;S. Hartmann
许多工业制造的零件由锌压铸材料组成。由于经典的本构模型不能预测这种材料的热机械结构行为-它表现出高度非线性的速率依赖性效应，独特的老化特性以及薄壁零件的尺寸依赖性-，因此有必要在不同条件下进行力学实验作为本构建模的基础。在这篇文章中，一个主要的目标是在不同温度下的锌压铸合金的速率依赖性的调查。在Zamak 5薄壁圆筒试验的基础上，提出了一个热力相容的无屈服面热粘塑性模型。此外，材料参数识别的概念，并将该模型的有限元程序的实施。最后，该模型的适用性是通过比较实验的一个复杂的组成部分与有限元模拟。
Many industrially manufactured parts consist of a zinc die-cast material. Since classical constitutive models cannot predict the thermo-mechanical structural behavior of such a material – which exhibits highly non-linear rate-dependent effects, distinct aging properties as well a size-dependence of thin-walled parts –, it is necessary to carry out mechanical experiments under varying conditions as a basis for constitutive modeling. In this article, one major goal is the investigation of the rate-dependence at different temperatures of a zinc die-casting alloy. On the basis of several experiments on thin-walled, cylindrical tubes of Zamak 5, a thermo-mechanically consistent thermo-viscoplasticity model without a yield surface is proposed. Moreover, a concept of material parameter identification is provided and the implementation of the model into a finite element program is shown. Finally, the applicability of the model is proven by comparing an experiment of a complex component part with finite element simulations.