Verification of FE model of fatigue crack propagation under mixed mode conditions
Verification of FE model of fatigue crack propagation under mixed mode conditions
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混合模式条件下疲劳裂纹扩展有限元模型验证
DOI：
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发表时间：
2009
期刊：
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通讯作者：
J. Kuzelka
中科院分区：
文献类型：
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作者：
M. Španiel;J. Jurenka;J. Kuzelka
本文介绍了混合模式载荷下疲劳裂纹扩展的有限元模拟结果。布拉格捷克技术大学 (CTU) 开发了使用商业软件 ABAQUS 进行疲劳裂纹模拟的程序代码。该程序的工作原理是裂纹逐渐扩展。在模拟中考虑小规模屈服条件。经典准则（J 积分、最大环向应力、巴黎定律）和结合 T 应力的双参数准则（扩展环向应力准则和修改的巴黎定律）均用于裂纹行为描述。实验在两组简单样本上进行。将数值模拟的结果与进行的实验进行比较。计算的裂纹扩展速率对应于 T 应力不显着的较短裂纹的实验。计算的裂纹形状与实验非常吻合。
Results of FEM simulations of fatigue crack growth under mixed mode loading are presented in this paper. At Czech Technical University in Prague (CTU) the program code which uses commercial software ABAQUS for fatigue crack simulations has been developed. The program works on basis of gradual crack extending. In simulation are considered small scale yielding conditions. Both classic criteria (J-integral, maximum of hoop stress, Paris law) and two-parameter criteria incorporating T-stress (extended hoop stress criterion and modified Paris law) are used for crack behaviour description. Experiments were carried out on two sets of simple specimens. The results of numerical simulations are compared with carried out experiments. Computed crack growth rate corresponds to experiments for shorter cracks at which T-stress is not significant. Computed crack shapes are in very good agreement with experiments.