Abstract
Experimental and numerical studies have been carried out to predict the behavior of composite laminates under low-velocity impact loads. Numerical models were built based on shell elements in order to simulate it efficiently. A strain-based failure theory was employed to predict the damaged area of laminates using a user-defined subroutine. Drop-weight impact tests were performed for verifying the analysis results of the low-velocity impact. The damaged areas were inspected using ultrasonic C-scans, and three types of thick composite laminates were examined. The impactor velocity was measured at time before and after contact with the target. Finally, the proposed numerical model with the failure theory was verified in that it well predicted the impact damage of the three composite laminates chosen for this study.
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