This paper is devoted to the numerical and experimental study of ductile fracture in bulk metal forming 2017A-T4 aluminum alloy. From an standpoint, alloy investigated under compressive load. Two cross-sections solid hollow specimens are considered. The mechanical behavior microstructure were characterized. It found that well-known barrel shape obtained when a load applied. Analyses topographie...

Ductile fracture through void growth to coalescence occurs at the grain scale in numerous metallic alloys encountered engineering applications. Classical models used perform numerical simulations of ductile fracture, as Gurson–Tvergaard–Needleman model and its extensions, are relevant for case large voids compared size, which a homogenization material behavior over number grains is used. Such m...

Ductile fracture through growth and coalescence of intergranular cavities is a failure mode observed experimentally in many metallic alloys used industrial applications. Simulation this process polycrystalline aggregates requires modeling the plastic yielding porous boundaries. However, classical yield criteria for materials such as Gurson–Tvergaard–Needleman model its current extensions cannot...

A strain gradient void-driven ductile fracture model of single crystals is proposed and applied to simulate crack propagation in oligo-crystal specimens. The based on a thermodynamical framework for homogenized porous solids unifying generalizing existing formulations. This crystal relies multi-surface representation plasticity which the standard Schmid law enhanced account porosity, including ...

This study investigates the effect of material parameters of the Gurson-Tvergaard-Needleman (GTN) model on the failure prediction of cellular structures. The effect of elastic modulus, calibration parameter of GTN model, isotropic hardening, fracture strain, and strut diameter on the load-displacement curve of a lattice structure fabricated by Selective Laser Melting (SLM) has been studied by u...

The concept of the local approach is applied to investigate different damage mechanisms of structural steels by micromechanical material models. Static and dynamic fracture resistance curves for a neutron-embrittled weld material are derived from tensile and Charpy-type specimens with the modified Gurson model. The behaviour of a test piece with a crack in the fenitic base material beneath an a...