Simulating Crack Initiation and Propagation in Ceramic Matrix Composites using Peridynamics
AuthorMITTS, CODY AARON
MetadataShow full item record
PublisherThe University of Arizona.
RightsCopyright © is held by the author. Digital access to this material is made possible by the University Libraries, University of Arizona. Further transmission, reproduction, presentation (such as public display or performance) of protected items is prohibited except with permission of the author.
AbstractThis study uses Peridynamics (PD) to predict the crack propagation in ceramic matrix composites (CMC). This investigation employs both the strong and weak form of the PD equations of motion. The solution approach based on the strong form of PD was applied to three-dimensional models. The weak form was developed to apply natural and essential boundary conditions. It was subsequently applied to axisymmetric problems. Both solution methods were executed using a high-performance computer to simulate the damage propagation of a CMC. For both approaches the results indicate that the critical stress ratio and fracture energy ratio between the coating and matrix have a strong influence on crack deflection in a CMC. Also, it was observed that the smaller these ratios are the earlier the crack deflection in the coating occurs.
Degree ProgramGraduate College