How stress triaxiality affects cavitation damage in high-density polyethylene: Experiments and constitutive modeling

The aim of this article is to investigate how the stress triaxiality affects plastic deformation behavior high-density polyethylene using an approach combining experiments and micromechanics-based modeling. stress-strain along with cavitation damage accumulation are experimentally quantified under well-controlled transversal response hourglass-shaped tensile specimens different curvature radii in order set triaxial states median cross-section. A constitutive elastic-plastic-damage representation then presented within a continuum-based micromechanical framework. model, constrained by same boundary conditions as experimental tests, used examine effects on separate synergistic plasticity micromechanisms that govern macro-response.