材料科学
极限抗拉强度
可塑性
结构工程
子程序
可预测性
实验数据
损伤力学
原位
有限元法
复合材料
工程类
计算机科学
数学
物理
气象学
操作系统
统计
作者
Pengjing Zhao,Z.H. Chen,Chaofang Dong
标识
DOI:10.1016/j.engfracmech.2015.11.017
摘要
Considering the effect of shear loading, an original GTN damage model is extended by combining the damage mechanics concept and the porous plasticity model. The extended model in terms of various stress triaxiality was deduced in detail. The model is extended by coupling two damage parameters into the yield function. The implementation is achieved by the development of the user material subroutine. Internal damage evolution was observed by scanning electron microscopy (SEM). Parameters were determined from experimental data and previous studies. The damage model was applied to in-situ tensile tests to compare its predictability in various specimens. The obtained numerical results were in good agreement with experimental results, showing better ductile fracture predictions.
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