| About this Abstract |
| Meeting |
MS&T21: Materials Science & Technology
|
| Symposium
|
Preceramic Polymers; Synthesis, Processing, Modeling, and Derived Ceramics
|
| Presentation Title |
Evolutive State and Damage Modeling and Characterization for PIP-based Hypersonic Vehicle Materials |
| Author(s) |
Rick Hall, Zlatomir Apostolov, Ashley Hilmas, George Jefferson, Vikas Varshney, Michael Cinibulk, Robert Brockman, Rebecca Hoffman, Thomas Key, Derek King |
| On-Site Speaker (Planned) |
Rick Hall |
| Abstract Scope |
While it allows for scale, relative expediency, and extreme durability, the unpredictable nature of microstructural evolution during PIP processing in the form of cracks, pores, and strain rates leads to significant variability in final CMC properties and shape. This is currently the most significant obstacle towards broader CMC utilization. The proposed work will develop material models driven by detailed experimental observations to better understand the variability in microstructural evolution during PIP processing, and the consequent effects on the composite’s ability to function as intended in hypersonic environments. The modeling aspect of this work will feature the precursor chemomechanical evolution during infiltration, cure, and pyrolysis of C/SiC, along with C/SiC oxidation behavior under representative in-service environments. A continuum/discrete damage and porosity simulation framework is being developed, which is capable of rendering the coupling between pyrolytic, oxidative, large volumetric, thermal and viscous responses of the constituent materials during multiple PIP processing cycles. |