Ductile fracture at the high triaxiality regime is well-known to be controlled by void
nucleation, growth and coalescence. However, under low stress triaxiality conditions and …

This contribution provides an improvement on GTN model upon the prediction of fracture
location within low level of stress triaxiality. In the proposition, two distinct damage …

Continuous damage accumulation resulting from void nucleation, growth, and coalescence
leads to the final ductile fracture. The Gurson–Tvergaard–Needleman (GTN) model and its …

A two-dimensional finite element (FE) model is presented to model the nucleation and void
growth stages in ductile damage phenomena on the microstructure scale. This model is …

One of the major drawbacks of the Gurson-type of porous plasticity models is the inability of
these models to predict material failure under low stress triaxiality, shear dominated …

Based on two ductile fracture mechanisms, a new modification to the Gurson–Tvergaard–
Needleman (GTN) model is proposed for the simulation of ductile fracture behaviors under …

One of the main shortcoming of existing damage models when applied to the simulation of
metal forming operations is their limited validity under low stress triaxiality conditions. An …

Damage initiation in high-strength aluminum alloys with a precipitate-rich matrix is typically
particle-driven. In AA7075-O temper, particle cracking and decohesion are the primary void …

Fracture micro mechanisms of ductile porous solids are substantially researched worldwide
since last 60 years through different experiments, theories, thermodynamics and computer …

The effects of stress triaxiality and initial porosity on void growth and coalescence are
studied in this paper. The representative material volume (RMV) is modeled by two …