Prediction of the Direction of XFEM Crack Based on Von Mises Around the Crack-tip under Mode-I

Abstract

The extended finite element method (XFEM) is now widely used in crack simulations and the direction of propagation of the XFEM crack in SS-304 has been quite interesting. This paper discusses the direction,θ(+ve in anti-clockwise direction), of the XFEM crack (under mode-I) propagation based on the von Mises stress-field around the crack-tip for static loading under the light water reactors (LWRs) conditions. The Mises core region from the crack-tip is chosen for β=〖90〗^o, the angle between the load and the initial crack. Experimental data for LWRs’environment is obtained and the simulations have been carried out applying three different static loads and results for the direction of the crack are calculated by measuring the stress-field around the crack-tip. It has been found that the direction of the XFEM varies inversely as the stress-field around the crack tip is increased. The computational results have been compared with the numerical results based on the minimum strain energy density criterion[S-criterion].

Simulation and research on fracture behavior of vehicle structural alloy materials based on XFEM

“…And learned that when analyzing fracture toughness problems, the simulation results of the 3D finite element model are better. Bashir R et al [5] combined the Von Mises criterion to analyze the stress field near the mode Ⅰ crack tip and predict the crack propagation direction. Nur Azam Abdullah et al [6] and R Rashnooie et al [7] evaluated the intralaminar and interlaminar damage of composite laminates and the damage behavior of composite-metal bonding surfaces and predicted fatigue life based on the XFEM method.…”