Simulation of Void Lining during Ductile Fracture

摘要

A computer model is developed for the simulation of low temperature ductile fracture of metals which contain random distributions of voids. Void distributions are modeled in two dimensions as arrays of circular holes which are characterized by area fraction, hole size, and a minimum hole spacing parameter which controls the degree of clustering. Experimentally measured local plasticity near holes provide the basis for the simulation, and predictions are made without the use of parameters to force fit. The simulation, illustrates the process of void linking with strain and correctly predicts the failure strains of aluminum and alpha-brass specimens over a range of hole-void microstructures.