Identification and validation of an extended Stewart-Cazacu micromechanics damage model applied to Ti–6Al–4V specimens exhibiting positive stress triaxialities

In this research, the Stewart-Cazacu micromechanics coupled damage model is extended and validated adding nucleation coalescence models as new mechanisms. The Ti–6Al–4V titanium alloy chosen a suitable hcp ductile material to be modeled using law. characterization of evolution in addressed throughout quasi-static experimental campaign. Damage relies on situ X-ray tomography data scanning electron microscopy imaging technique. validation procedure consists implementation into finite element research software Lagamine ULiège comparison numerical predictions results. Load–displacement curves damage-related state variables at fracture configuration from smooth notched bar specimens submitted tensile tests are analyzed. extensions well an accurate elastoplastic parameter identification for samples essential features reach model. prediction capabilities exhibited large strains good agreement with results, while near-fracture can still improved.