Quasi-Static Simulation of Crack Growth in Elastic Materials Considering Internal Boundaries and Interfaces
Quasi-Static Simulation of Crack Growth in Elastic Materials Considering Internal Boundaries and Interfaces
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考虑内部边界和界面的弹性材料裂纹扩展的准静态模拟
DOI：
10.4028/www.scientific.net/kem.525-526.181
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发表时间：
2012
期刊：
影响因子：
--
通讯作者：
A. Ricoeur
中科院分区：
文献类型：
--
作者：
P. Judt;A. Ricoeur
本文提出了基于线弹性断裂力学理论的技术结构裂纹路径预测的数值方法。采用有限元法和网格重划算法相结合的方法来模拟裂纹扩展。提出了一种可提供J积分和应力强度因子等加载参数的后处理方法。路径无关的围道积分用于避免裂纹尖端网格划分的特殊要求，并使包括界面和内部边界在内的域的计算更加有效。特别是，裂纹和内部边界和界面的相互作用进行了研究。该模拟结合了弹性体和双材料界面内的裂纹扩展。后者是基于一个凝聚区模型。文中给出的裂纹路径的数值计算结果得到了实验的验证。
This work presents numerical methods used for predicting crack paths in technicalstructures based on the theory of linear elastic fracture mechanics. The FE-method is usedin combination with an efficient remeshing algorithm to simulate crack growth. A post pro-cessor providing loading parameters such as the J-integral and stress intensity factors (SIF) ispresented. Path-independent contour integrals are used to avoid special requirements concern-ing crack tip meshing and to enable efficient calculations for domains including interfaces andinternal boundaries. In particular, the interaction of cracks and internal boundaries and inter-faces is investigated. The simulation combines crack propagation within elastic bodies and atbi-material interfaces. The latter is based on a cohesive zone model. The presented numericalresults of crack paths are verified by experiments.