PSI - Issue 39

M.R.M. Aliha et al. / Procedia Structural Integrity 39 (2022) 393–402 Author name / Structural Integrity Procedia 00 (2021) 000–000

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Fig. 5. Fracture path simulation for the BI-SBB specimen subjected to mixed mode I/II ( α = 30 o ) loading using the incremental crack growth method (based on MTS criterion).

4.2. Based on the hybrid XFEM-CZM approach In Figure 6 the FE model of BI-SBB specimen was created based on the combination of XFEM and surface-based CZM with a total number of 8200 CPE4 (i.e. A 4-node bilinear plane strain quadrilateral) elements. Creating a finite element model of the BI-SBB specimen was the first step in implementing approach. Based on the XFEM, the adhesive layer was defined in the second step as a region of enriched elements where the crack can expand in any arbitrary direction. This region was defined as the cohesive surface along with the interface between the adherents and the adhesive. Finally, the model was loaded under three-point bending conditions to determine its damage and failure response.

Fig. 6. Finite element model of BI-SBB specimen based on XFEM-CZM approach.