Numerical Simulation of Dynamic Elasto Visco-plastic Fracture Using Moving Finite Element Method
T. Fujimoto; and T. Nishioka

Source CMES: Computer Modeling in Engineering & Sciences, Vol. 11, No. 2, pp. 91-102, 2006
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Keywords Nonlinear fracture, T* integral, Moving finite element method, Wake zone, Non-straight crack propagation
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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