Fatigue crack propagation within Al-Cu-Mg single crystals based on crystal plasticity and XFEM combined with cohesive zone model

A method combining crystal plasticity (CP), the eXtended Finite Element Method (XFEM), and cohesive zone model (CZM) with traction separation law is developed for an Al-Cu-Mg alloy to predict effect of grain orientation on fatigue crack propagation (FCP) during stage ?? within a single crystal. The simulation results show that all orientations, Goss possesses largest deflection, then followed by Cube orientation. Comparatively, Brass, Copper, S Random grains have relatively small deflection angles. Besides, it found lowest FCP rate as compared other orientations. simulations are consistent previous experimental observations. This indicates this coupled CP XFEM CZM capable well predicting