Crack propagation in amorphous Si₃{N}₄$ films is investigated with large-scale molecular-dynamics simulations on parallel machines. We observe a correlation between the speed of crack propagation and the morphology of fracture surfaces. Initially, as the crack propagates slowly, the roughness exponent for fracture surfaces is found to be 0.44. However, beyond a certain speed of crack propagation, the exponent crosses over to 0.8. This crossover behavior is similar to the recent experimental finding by Bouchaud and Nav\'eos.
No takes yet. Share an insight, caveat, or question.
Nakano et al. (1995) studied this question.
Synapse has enriched 4 closely related papers on similar clinical questions. Consider them for comparative context: