Energy radiation of moving cracks
S. Fratini, O. Pla, P. Gonzalez, F. Guinea, E. Louis
Abstract
The energy radiated by moving cracks in a discrete background is analyzed. The energy flow through a given surface is expressed in terms of a generalized Poynting vector. The velocity of the crack is determined by the radiation by the crack tip. The radiation becomes more isotropic as the crack velocity approaches the instability threshold.
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