Abstract
The model of a crack with a process zone is considered and generalized to orthotropic materials. It is assumed that a material in the process zone satisfies a strength condition of arbitrary form. Based on the crack model, the fracture of an orthotropic cracked plate under biaxial loading is studied. The crack is directed along one of the anisotropy axes with external loads being applied in parallel and perpendicularly to it. The influence of the biaxiality of external loading on the critical state of the cracked plate is analysed within the framework of the critical crack opening displacement and critical J-integral criteria. Numerical solution is obtained using the Mises-Hill and Gol’denblat-Kopnov strength criteria. Theoretical results are compared with experimental data obtained by testing specimens made of structural metals.
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