|
Vol.13, No3, 2013, pp.179–188 |
|
CRACK GROWTH ANALYSIS IN FRICTION STIR WELDED JOINT ZONES USING EXTENDED FINITE ELEMENT METHOD Danijela Živojinović1, Aleksandar Sedmak2, Aleksandar Grbović2 1)Technical College, bul. Zorana Djindjića 152-a, Belgrade, Serbia, danijela.zivojinovic@yahoo.com 2)University of Belgrade, Faculty of Mechanical Engineering, Belgrade, Serbia |
|
Abstract Presented in this paper is the analysis of crack growth in zones of a welded joint, obtained by Friction Stir Welding - FSW. Plates of aluminium alloy 2024-T351 are frontally welded using the FSW procedure. Plate models are made using ABAQUS software. Material properties in the weld zones are adopted from papers by other authors. The plate is subjected to tensile fatigue loading with cycle asymmetry factor of R = 0. The crack growth is observed (for a non-stationary crack) and stress intensity factors are analysed around the crack tip for every crack front. The eXtended Finite Element Method (XFEM) in this analysis has enabled automatic mesh generation around the crack tip for every step of its growth. The aim of this paper is the integrity assessment of a structure that is produced by friction stir welding with an initial crack Keywords: aluminium, crack, fracture, friction stir welding (FSW), extended finite element method (XFEM), fatigue |
|
full article (1310 kB)
|
