Abstract
Analysis of fracture mechanics of the compression after impact (CAI) test for carbon fiber reinforced plastics (CFRPs) has been carried out in order to clarify the factors controlling the fracture process in the test and to establish a simpler small-scale test method. A series of methods of analysis is proposed which enables prediction of the size of the impact-induced damage and the inplane compression strength of the damaged plate based on basic properties such as the elastic modulus and the mode I and II interlaminar fracture toughness of the CFRP. The method has been applied to the standard-size and small-scale CAI tests, and it was found that the results of both tests can be predicted by the method. It was also shown that the CAI strength obtained from the standard-size test can be predicted from the small-scale test results.
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