SIMULATION OF FATIGUE CRACK GROWTH IN A2024-T351 T-WELDED JOINT
Abubakr Krаedegh1, Wei Li2, Aleksandar Sedmak1, Aleksandar Grbovic1, Nataša Trišović1, Radivoje Mitrović1, Snežana Kirin3
1)University of Belgrade, Faculty of Mechanical Engineering, Serbia,
2)Xidian University, School of Mathematics and Statistics, Xi'an China
3)University of Belgrade, Innovation Centre of the Faculty of Mech. Engng., Belgrade, Serbia
Fatigue crack growth in friction stir welded T joints under three point bending is simulated numerically using the Extended Finite Element Method (XFEM). Three point bending fatigue load stress is applied at the centre of the plate opposite to the initial crack, with a ratio of stress intensity R = 0 and maximum stress σ = 10 MPa. The material properties of all welded regions in the joint, made of aluminium alloy A2024-T351, are adopted from available experiments. All fatigue crack propagation and growth including crack front coordinates (x, y, z) and stress intensity factors (KI, KII, KIII i Kef) are extracted from the analysis results.
Keywords: friction stir welding, aluminium alloys, fatigue crack growth, extended finite element method, fatigue life