A finite element study of the effects of material characteristics and crack tip constraint on dynamic ductile fracture initiation

摘要

In this work, 2-D (plane strain) finite element analyses of a ductile three-point bend fracture specimen subjected to Mode Ⅰ, dynamic (impact-like) loading are conducted. The initiation of a hole by debonding around a large inclusion and its interaction with the notch tip is simulated. The background material is represented by the Gruson constitutive model and micro-void Nucleation at uniformly fistributed small size particles is also taken into account.