材料科学
可塑性
概率逻辑
冯·米塞斯屈服准则
结构工程
机械
延展性(地球科学)
压力(语言学)
断裂(地质)
蠕动
冶金
有限元法
复合材料
数学
工程类
物理
语言学
统计
哲学
作者
Yong Fa Zhang,Fuhui Shen,Jiang Zheng,Sebastian Münstermann,Wei Han
出处
期刊:Key Engineering Materials
日期:2022-07-22
卷期号:926: 1931-1938
被引量:1
摘要
Both experimental method and numerical method are used to analyze the large variation in the material ductility of high pressure die casting (HPDC) Aural-2 alloy in the present work. The X-ray tomography (XRT) technique is used to characterize and reveal the significant variation of the internal porosity for the investigated material. The Mises plasticity model in conjunction with a mixed Swift-Voce hardening law, and a stress state dependent fracture initiation criterion are used to accurately describe the deformation response of the material. Very good agreement with the experimental results is obtained in the predicted average force-displacement responses for the calibrated stress states. A probabilistic damage mechanics model is put forward to depict the apparent stochastic ductile fracture behavior over a wide range of stress states. The 5 th and 95 th percentiles of the fracture initiation locus are recalibrated based on the proposed probabilistic ductile fracture model, which could provide an almost perfect prediction of the maximum and minimum bounds of force-displacement curves.
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