Abstract:Ductile fracture in metals is the accumulative result of damage. The basic mechanisms of ductile fracture
are divided into two modes (tension-type mode and shear-type mode) according to voids evolution model and meso-
damage mechanism. A unified ductile fracture criterion is proposed for wide applicable range. The proposed ductile
fracture criterion is implemented into quasi-static finite element method through a compilation of user’s material subroutine
VUMAT of the commercial finite element platform ABAQUS. The ductile fracture model is validated by comparing
between experimental data and numerical results. It is shown that the proposed ductile fracture model can accurately
and effectively predict the whole damage process of ductile metals including crack initiation, propagation and final
fracture. Ductile metallic materials voids-fracture mechanism studies show that the formation of macroscopic crack
monotonic in the loading process are the growth of voids in the inclusions and second phase particles around the nucleation
until the polymerization.
