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Damage Progression in the Vicinity of a Hole

Numerical simulations of damage progression in laminated composites with a hole are presented. The finite element procedure which incorporates two-phase continuum damage constitutive relations is utilized for the numerical predictions. The pre dictions from the numerical simulations are compared with the experimental results. The similarities and contradictions between predictions and experimental observations are dis cussed. Overall, the predictions are qualitatively close to experimental observations. The qualitative difference between predictions and experimental observations is obvious in laminates where delamination and edge stresses play a significant role in damage evolution up to ultimate failure. The discrepancy in results in these cases is due to limitation of the failure modes incorporated in the model and the damage induced by the out-of-plane stresses.