Abstract

Model simulations have been carried out to explore the evolution of impact damage in brittle materials. Crack growth is modeled as processes of strain energy dissipation using a cubic lattice system. By supplying a large energy to the center of the system surface, the evolution of cracks initiated by this impact shock is pursued. The results of the simulations reveal a characteristic difference in the pattern of impact cracks. The system with a spatially fluctuating distribution of strain energy is resistant to an impact shock. The system with a relatively uniform distribution shows a deep penetration of impact cracks. The evolution of impact damage is discussed in connection with the resistibility of brittle materials to an impact shock.

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