Abstract
A cohesive zone model (CZM) based approach is applied with 3D finite element method to simulate stable tearing crack growth events in Arcan specimens made of 2024-T3 aluminum alloy. The CZM parameter values are calibrated for a triangular cohesive law under Mode I condition. Simulation prediction of the load-crack extension curve compares reasonably well with experimental data. With the same set of CZM parameter values, simulations are performed for mixed Mode I/II stable tearing crack growth events as well. A good agreement is also reached between the simulation predictions and the experimental results. The CTOD variation with crack extension is also checked under both Mode I and mixed-mode I/II conditions. The results suggest that CZM based simulations can predict the critical CTOD value, which conventionally is used as an input in CTOD based stable tearing simulations and is obtained from experimental measurements. The findings of the current study establish a connection between CTOD and CZM based simulation approaches.KeywordsCohesive zone modelingFinite element analysisCrack growthMixed-mode fractureStable tearing
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