Application of the Dung's Microscopic Damage Model to Predict Ductile Fracture of the Deep Drawn Aluminum Alloy Sheets

摘要

In this paper, a mechanistic model to predict failure voided ductile materials is developed based on the Dung's microscopic damage model (Dung, N.L., 1992, Three Dimensional Void Growth in Plastic Materials, Mechanics Research Communications, Vol. 19, No. 3). The model incorporates the Hill's quadratic anisotropic yield criterion (1948) to account for anisotropy of sheet metals. The model is implemented as a vectorized user-defined material (VUMAT) subroutine in the ABAQUS/Explicit commercial finite element code. Predictions of ductile crack behavior based on void nucleation, growth and coalescence by the Dung's model are compared with Gurson-Tvergaard-Needleman (GTN) model and published experimental data.