Comparison of failure modes and damage mechanisms of CFRP and C/C composite joints under out-of-plane loading

In this paper, by use of test combined with numerical simulation, the out-of-plane loading-bearing failure process of CFRP and C/C joints were studied, while Hashin failure criterion was selected to predict the damage and the failure morphologies were observed. Results show that the failure process of CFRP joint is characterized by a three-peak mechanical response and bending failure accompanied the failure mechanism of interface debonding and cracking of fiber and matrix, and that of C/C joint is characterized by pseudoplasticity and shearing failure accompanied a large number of matrix cracks, local interface debonding and fiber kink and buckling.