Rock cross crack destruction analysis based on peridynamic theory
This article used the single bond dual parameter bond type peridynamic method to simulate the process of rock cross crack failure.Compared to traditional bond type peridynamic,this article considered the normal and radial movement of material point pairs,breaking through the limitations of Poisson's ratio,and introduced a linear loading algorithm to avoid sudden changes in displacement when applying loads.A peridynamic model that could accurately describe rock failure was established,thereby simulating the initiation and nucleation process of cross orthogonal cracks in rocks.This experiment compared and analyzed the crack propagation path of initial cross crack specimens with different positions and inclination angles under axial compression with experimental results.The effects of factors such as crack center spacing and crack inclination angle on crack initiation and propagation were studied,and the simulation results were in good agreement with the experimental results.
rock failurecrack propagationperidynamiclinear loadingnumerical simulationcross orthogonal crack
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