Effect of strain rate-sensitivity on statistical evolution of microvoids

摘要

The statistical evolution of microvoids under high stress triaxiality is investigated. Based on the expression for the void growth rate in a power-law viscous matrix and the balance law of microvoids’ number, the evolution of microvoids’ number density under dynamic loading is studied. Thus, the si2E distribution functions of microvoids are found from the theoretical analysis, and the effect of strain rate-sensitivity of the matrix on the evolution of microvoids is examined. The present theoretical analysis may provide a reasonable explanation for the experimental phenomena observed by previous researchers.