Crack growth measurement and <i>J</i> ‐integral evaluation of additively manufactured polymer using digital image correlation and FE modeling

This paper presents and compares two combined experimental-numerical techniques for the investigation of fracture properties additively manufactured polymer parts using digital image correlation (DIC) measurements. The first method only uses measured kinematic fields, second is based on finite element simulations driven by boundary conditions. A mini single edge notched tensile sample fused filament fabrication with ABS studied. It shown that both methods locally extract J-integrals, crack tip accurately located FE-based method. By comparing computed displacements to those via DIC, it possible check validity numerical model. initiation propagation stages are analyzed independently thanks different magnifications acquired series.