Open Access

ARTICLE

Numerical Simulation of Dynamic Elasto Visco-plastic Fracture Using Moving Finite Element Method

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1 Kobe University, Kobe, Japan

Computer Modeling in Engineering & Sciences 2006, 11(2), 91-102. https://doi.org/10.3970/cmes.2006.011.091

Abstract

In the dynamic fracture of metallic material, some cracks propagate with the incidence of plastic deformation, and distinct plastic strain remains near the post-propagation area. In order to elucidate these dynamic nonlinear fracture processes, the moving finite element method is developed for nonlinear crack propagation. The T* integral is used as the parameter to estimate crack tip condition. First, the effect of material viscosity and crack propagation velocity have been discussed based on the numerical results for fracture under pure mode I high speed loading. Under mixed mode loading, numerical simulations for fracture path prediction are demonstrated for various crack propagation velocities. In these numerical simulations, the maximum hoop stress criterion is used to predict the fracture path.

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Keywords

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