Wang Yu, Wang Qingsong, Chen Haodong, Sun Jinhua, He Linghui
State Key Laboratory of Fire Science, University of Science and Technology of China, Hefei 230026, China.
Materials (Basel). 2016 Sep 22;9(10):794. doi: 10.3390/ma9100794.
This paper explores the fracture process based on finite element simulation. Both probabilistic and deterministic methods are employed to model crack initiation, and several commonly used criteria are utilized to predict crack growth. It is concluded that the criteria of maximum tensile stress, maximum normal stress, and maximum Mises stress, as well as the Coulomb-Mohr criterion are able to predict the initiation of the first crack. The mixed-mode criteria based on the stress intensity factor (SIF), energy release rate, and the maximum principal stress, as well as the SIF-based maximum circumferential stress criterion are suitable to predict the crack propagation.
本文基于有限元模拟探讨了断裂过程。采用概率方法和确定性方法对裂纹萌生进行建模,并利用几种常用准则预测裂纹扩展。结果表明,最大拉应力准则、最大正应力准则、最大米塞斯应力准则以及库仑 - 莫尔准则能够预测第一条裂纹的萌生。基于应力强度因子(SIF)、能量释放率和最大主应力的混合模式准则以及基于SIF的最大周向应力准则适用于预测裂纹扩展。