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首页> 外文期刊>Journal of teoretical and applied mechanics >A STRAIN ENERGY DENSITY THEORY FOR MIXED MODE CRACK PROPAGATION IN RUBBER-LIKE MATERIALS
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A STRAIN ENERGY DENSITY THEORY FOR MIXED MODE CRACK PROPAGATION IN RUBBER-LIKE MATERIALS

机译:橡胶材料混合模式裂纹扩展的应变能密度理论

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摘要

In this paper, a numerical modeling of crack propagation for rubber-like materials is presented. This technique aims at simulating the crack growth under mixed-mode loading based on the strain energy density approach. At each crack increment length, the kinking angle is evaluated as a function of the minimum strain energy density (MSED) around the crack tip, using the Ansys Parametric Design Language (APDL). In this work, numerical examples are illustrated to demonstrate the effectiveness, robustness and accuracy of the computational algorithm to predict the crack propagation path. The results obtained show that the plan of crack propagation is perpendicular to the direction of the maximum principal stretch. Moreover, in the framework of linear elastic fracture mechanics (LEFM), the minimum values of the density are reached at the points corresponding to the crack propagation direction.
机译:本文提出了一种橡胶状材料裂纹扩展的数值模型。该技术旨在基于应变能密度方法模拟混合模式载荷下的裂纹扩展。在每个裂纹扩展长度处,使用Ansys参数设计语言(APDL)将弯折角作为裂纹尖端周围最小应变能密度(MSED)的函数进行评估。在本文中,通过数值例子说明了预测裂纹扩展路径的计算算法的有效性,鲁棒性和准确性。所得结果表明,裂纹扩展的方向垂直于最大主拉伸方向。此外,在线性弹性断裂力学(LEFM)的框架中,在与裂纹扩展方向相对应的点处达到了密度的最小值。

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