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Abstract
Compression after impact (CAI) strength is a key design criteria for composite structure. In this study, impact damage and CAI strength were simulated by progressive damage analysis. The LaRC03 failure criteria which consider fiber kink failure mode was employed for each lamina, and cohesive zone modelling was applied for interlaminar resin layer. In these analyses, impact load and static compression load were applied successively. The simulated impact damage area and CAI strength were compared to tests results. Consequently, simulation well predicted test results for both of impact damage and CAI strength. In addition, it was suggested that CAI failure is caused by fiber kink in each lamina, not by propagation of delamination.
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