On the Dynamic Energy Release Rate in Elastic Crack Propagation.
CARNEGIE-MELLON UNIV PITTSBURGH PA DEPT OF MATHEMATICS
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It is the purpose of this paper to give a unified treatment of the dynamic energy release rate, E, for a sharp, straight crack in a hyperelastic body undergoing finite strain. As our main result we decompose E into the usual quasi-static energy release rate plus a nonpositive dynamic contribution thus for a dynamic solution the energy release rate computed using the classical quasi-static formula is larger than the actual dynamic energy release rate.