Ductile fracture of high strength steels with morphological anisotropy, Part II: Nonlocal micromechanics-based modeling

The ductile fracture behavior of a high strength steel is addressed in this two-part study using micromechanics-based approach. objective Part II to propose, identify, and validate numerical model based on the Gurson–Tvergaard–Needleman model. This enhanced by Nahshon–Hutchinson shear modification combination with generalization Thomason coalescence criterion within fully nonlocal form relying damage-to-crack transition technique. material involves parameters different natures either related micro-mechanics porous materials or semi-empirical formalisms. void nucleation elastoplastic have been developed identified I. other are part inverse modeling both results cell simulations experimental measurements. shown adequately predict effect stress triaxiality Lode parameter strain as well anisotropy. While cup-cone slant paths round bars plane specimens, respectively, cannot be captured pure continuum approach, framework reproduces these observations.