Based on the modification of Gurson-Tvergaard-Needleman(GTN)model for shear failure by Nahshon and Hutchinson,a void-based meso-damage constitutive model was implemented into an implicit finite element code via a user defined material subroutine(UMAT)in ABAQUS.Two critical numerical procedures,integration of the rate form constitutive equations as well as linearization of consistent tangent modulus,involved in developing the constitutive model were illustrated in detail.Examples for single-element models un...