Abstract
A unified local criterion for ductile fracture is proposed on the basis of the continuum damage mechanics (CDM) model given by the author in Part I [ Engng Fracture Mech. (submitted)], in which the stress, strain and damage history are included. The new ductile fracture parameter W DC has obvious physical meaning and can be determined by a macroscopic method, which is experimentally verified as a material constant independent of stress states. Comparisons of the present criterion with others are given, which show some advantages of the present criterion over others. The relationship between local parameter W DC and the well known global parameter J C is also established.
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