Influence and sensitivity of inertial effect on void growth behavior in ductile metals

Started from the law of conservation of energy, the growth equation of micro-voids is gained, in which inertial effect has been taken into account. Based on Gurson model, the growth equation of voids is introduced into Gurson model through VUMAT subroutine in ABAQUS software, and the void growth behavior affected by inertial effect is investigated. The results show that inertial effect decreases the rate of void grows, and with the increasing of the loading rate, the decreasing effect becomes more remarkable. Inertial effect is very sensitive to the initial damage of the material and the distribution of the void density. The larger the initial damage and the sparser the void density, the stronger the inertial effect on the void growth.