| About this Abstract |
| Meeting |
MS&T23: Materials Science & Technology
|
| Symposium
|
2023 Undergraduate Student Poster Contest
|
| Presentation Title |
A Coupled Multi-phase-Field modeling and Experimental Damage Characterization in CMCs |
| Author(s) |
Lucas M. Rackers, Jeremy Watts, Arezoo Emdadi |
| On-Site Speaker (Planned) |
Lucas M. Rackers |
| Abstract Scope |
Materials' macroscopic damage capabilities and failure mechanisms are dependent on their microstructure. This dependency is especially pronounced in brittle materials like ceramic matrix composites (CMCs), which have structural applications in extreme environments. Phase field (PF) modeling is a powerful tool to investigate the complex fracture mechanisms in CMCs due to their complicated micro- and meso-structures. In this study, a multi-scale computational model based on the regularized formulation of Griffith’s theory and PF modeling was developed to study fracture behavior in CMCs. The developed model was validated using in-situ tensile testing on Ox-Ox specimens and high-resolution SEM imaging. At the micro-scale, information from the SEM micrographs was used to construct random representative fiber distributions. Then, Crack initiation, deflection, and coalescence were studied using the PF model. Micro-scale data was used to develop a mesoscale model that captured crack deflection around fiber tows and delamination features. |