Abstract
Finite element analysis (FEA) and pushout tests have been used to discuss several key elements of interface debonding in continuous fiber ceramic matrix composites. This study includes (i) the interaction between fiber debonding and a matrix crack, (ii) the interface shear- stress distribution, and (iii) the interface de-bonding criterion. The interface debonding process is simulated including a pre-existing crack in the matrix. This simulation shows that the stability of the pre-existing crack may be affected by interface debonding ahead of it. The interfacial shear-stress distribution during the pushout test is also computed and gives useful information about the interface debonding criterion. Moreover, the numerical results also give a rational explanation for the experimentally observed trends, including the effect of thermally induced stress on the interfacial debonding.KeywordsFiber Volume FractionInterfacial Shear StressShear Stress DistributionInterface ProblemNormalize Shear StressThese keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.
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