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首页> 外文会议>International Conference on Fracture and Damage Mechanics(FDM 2007); 20070717-19; Madeira(PT) >On the influence of the corner singularity on kinking mixed-mode crack propagation
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On the influence of the corner singularity on kinking mixed-mode crack propagation

机译：拐角奇异性对弯折混合模裂纹扩展的影响

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摘要

The aim of the presentation is to highlight the influence of the kink, developing at the beginning of mixed-mode crack growth, on the propagation behavior of the crack. Le et al. [1] have shown that the variationa] principle of a body containing a crack results in the principle of maximum energy release rate incorporating the stress intensity factors of the kinked crack. Here the influence of the kink and the kinking angle, resulting in a singular field around the corner, on the crack growth is analyzed. The generalized stress intensity factors at the kinks corner are computed with the help of a FEM strategy. The influence of these on the T-stresses and the plastic energy dissipated at the kink is determined using a small scale yielding approach. The impact of these results on mixed-mode crack propagation is discussed.
机译：演示的目的是强调在混合模式裂纹扩展开始时出现的扭结对裂纹扩展行为的影响。 Le等。文献[1]表明，包含裂纹的物体的变分原理导致最大能量释放率的原理，其中包含了扭结裂纹的应力强度因子。在这里，分析了扭结和扭折角（拐角处产生奇异场）对裂纹扩展的影响。扭折角处的广义应力强度因子借助FEM策略进行计算。这些对T应力和扭结处耗散的塑性能量的影响是使用小规模屈服方法确定的。讨论了这些结果对混合模式裂纹扩展的影响。

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