Abstract
An elastic-viscoplastic constitutive model is proposed instead of the usual elastoplastic model. It is assumed that when crack-tip is approached the viscosity coefficient lends to zero (η=η0r). Asymptotic analysis of the dynamic field near a propagating crack-tip is given, and the uniparameter solution is obtained. The numerical result is given for various Mach number and viscosity coefficient. Based on the asymptotic solution, a fracture criterion is proposed and the stability of crack propagation is discussed.
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Communicated by Yeh Kai-yuan
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Yu-chen, G. Viscoplastic field near a propagating crack-tip. Appl Math Mech 11, 33–43 (1990). https://doi.org/10.1007/BF02014569
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DOI: https://doi.org/10.1007/BF02014569