| About this Abstract |
| Meeting |
2020 TMS Annual Meeting & Exhibition
|
| Symposium
|
Fracture Modeling of Composite Materials
|
| Presentation Title |
An Improved Fracture Mechanics-informed Multiscale Thermomechanical Damage Model for Ceramic Matrix Composites |
| Author(s) |
Travis D. Skinner, Jacob Schichtel, Aditi Chattopadhyay |
| On-Site Speaker (Planned) |
Travis D. Skinner |
| Abstract Scope |
A multiscale damage model is proposed to model the nonlinear mechanical behavior of silicon carbide (SiC) ceramic matrix composites (CMCs). The material stress-strain constitutive relationship will be derived using internal state variable (ISV) theory with a tensorial damage ISV, which will be defined to capture the effects of both micro- and macroscale matrix cracks initiating from manufacturing induced cavities, and a void nucleation ISV, which will capture the effects of void nucleation and coalescence due to grain boundary slipping and material diffusion. Fracture mechanics and crack growth kinetics will govern the progression of cracking and the temporal evolution of the damage ISV, while grain boundary slippage and material diffusion laws will govern the nucleation and coalescence of matrix voids. High temperature effects, which significantly affect CMC mechanical behavior, will be included in the thermomechanical formulations of the ISVs. |
| Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |