FINITE-DEFORMATION IRREVERSIBLE COHESIVE ELEMENTS FOR THREE-DIMENSIONAL CRACK-PROPAGATION ANALYSIS
FINITE-DEFORMATION IRREVERSIBLE COHESIVE ELEMENTS FOR THREE-DIMENSIONAL CRACK-PROPAGATION ANALYSIS
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DOI：
10.1002/(sici)1097-0207(19990330)44:9
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发表时间：
1999-03
影响因子：
2.9
通讯作者：
M. Ortiz;A. Pandolfi
中科院分区：
文献类型：
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作者：
M. Ortiz;A. Pandolfi
本文提出了一种三维有限变形凝聚元和一类不可逆凝聚律，使动态扩展裂纹的精确跟踪成为可能。内聚元素控制裂纹的分离，根据不可逆的内聚定律，最终导致自由表面的形成，并与传统的尼特元素离散的散装材料是兼容的。该方法的通用性和预测能力，通过模拟的落锤动态断裂试验类似于那些报道的Zehnder和Rosakis。[1]特别值得注意的是，该方法能够近似实验观察到的裂纹尖端轨迹。版权所有？John Wiley & Sons，Ltd.
SUMMARY We develop a three-dimensional nite-deformation cohesive element and a class of irreversible cohesive laws which enable the accurate and ecient tracking of dynamically growing cracks. The cohesive element governs the separation of the crack anks in accordance with an irreversible cohesive law, eventually leading to the formation of free surfaces, and is compatible with a conventional nite element discretization of the bulk material. The versatility and predictive ability of the method is demonstrated through the simulation of a drop-weight dynamic fracture test similar to those reported by Zehnder and Rosakis. 1 The ability of the method to approximate the experimentally observed crack-tip trajectory is particularly noteworthy. Copyright ? 1999 John Wiley & Sons, Ltd.