A new mixed mode fracture specimen (2MCG): numerical and experimental results

International audienceAn original Mixed Mode Crack Growth specimen (2MCG) providing fracture stability during crack propagation is presented. This geometry is a complex compromise between CTS (Compact Tension Shear) and DCB (Double Cantilever Beam) fracture specimens. Using a CCD camera and a testing machine equipped with data acquisition system, an image analysis protocol allows to plot instantaneous crack propagation is performed and the Force-displacement curves are recorded. With these data, the forces-cracks lengths curves are plotted. As results, the experimental (obtained by the compliance method) and numerical (given by M integral in finite element) energy release rate are compared