Combined XFEM-cohesive finite element analyses of single-lap joints
Keywords:single-lap joint, cohesive zone model, extended finite element method, process zone, aluminium adherends
Cohesive Zone Modelling (CZM) and eXtended Finite Element Modelling (XFEM) available in Abaqus® are used together to simulate the behaviour and strength of a single-lap adhesively bonded joint. A distinct CZM model is also used. The variation of the peeling and shearing stresses in the process zone is shown and explained before and after damage initiation. Shearing and peeling stress fields along the overlap of the single-lap joint are compared by using both the XFEM-cohesive model and the cohesive model at damage initiation and propagation for two different thicknesses of the aluminium adherends. The two simulation models were tested successfully. However the XFEM-cohesive model is recommended only for particular applications. The cohesive model proved to be more accurate and easier to be used.
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