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A generalized cohesive element technique for arbitrary crack motion

机译:任意裂纹运动的广义内聚元技术

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摘要

A computational method for arbitrary crack motion through a finite element mesh, termed as the generalized cohesive element technique, is presented. In this method, an element with an internal discontinuity is replaced by two superimposed elements with a combination of original and imaginary nodes. Conventional cohesive zone modeling, limited to crack propagation along the edges of the elements, is extended to incorporate the intra-element mixed-mode crack propagation. Proposed numerical technique has been shown to be quite accurate, robust and mesh insensitive provided the cohesive zone ahead of the crack tip is resolved adequately. A series of numerical examples is presented to demonstrate the validity and applicability of the proposed method.
机译:提出了一种通过有限元网格进行任意裂纹运动的计算方法,称为广义内聚元技术。在这种方法中,具有内部不连续性的元素被具有原始和虚构节点组合的两个叠加元素替代。仅限于沿元素边缘的裂纹扩展的常规内聚区建模被扩展为包含单元内混合模式裂纹扩展。如果充分解决了裂纹尖端之前的内聚区,建议的数值技术已被证明是非常准确,鲁棒且对网格不敏感的。给出了一系列数值算例,证明了该方法的有效性和适用性。

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