Evaluation of the Mutual Effect of Through Crossing Cracks

The results of numerical simulation of biaxial stretching of a thin elastic plate with two orthogonally crossing through cracks are presented in the article. Their mutual effect on the strain-stress state near the crack tips was investigated. Singular (stress intensity factors — SIFs) and non-singular (T-stress) components of the stress field in the vicinity of one of the cracks were determined at various relative sizes and positions of the centers of the cracks, as well as parameters of biaxial loading. The calculations were performed using a parametrical finite element model developed by the authors. It was found that the above-mentioned factors have a significate effect on SIFs and T-stresses. The results obtained show that the mutual effect of crossing cracks should be taken into consideration when calculating resistance to brittle fracture.

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