Multiscale Thermomechanical Damage Model with Internal State Variables for Ceramic Matrix Composites
- Arizona State University; Arizona State University
- Arizona State University
A length scale-dependent matrix damage model has been developed to simulate the response of ceramic matrix composites (CMCs). This model captures damage initiation and propagation in the brittle matrix material by employing internal state variable (ISV) theory within a multiscale modeling framework to obtain damaged matrix stress-strain constitutive relationships at each length scale. Material degradation due to matrix cracking is captured by a damage variable determined using fracture mechanics and the self-consistent scheme. An additional state variable is introduced to capture the nucleation and growth of matrix porosity, a key mechanism contributing to matrix nonlinearity. Porosity occurs as a result of material diffusion around grain boundaries and the growth of the porosity state variable is related to the material entropy dissipation and the volumetric strain. The nonlinear predictive capabilities of the material model are demonstrated for monolithic silicon carbide, unidirectional (UD) carbon fiber/silicon carbide matrix (C/SiC) CMC, and five-harness satin (5HS) woven C/SiC CMC.
- Research Organization:
- Arizona State University
- Sponsoring Organization:
- USDOE
- DOE Contract Number:
- FE0031759
- OSTI ID:
- 2395950
- Report Number(s):
- DOE-0031759
- Conference Information:
- Journal Name: AIAA Scitech 2020 Forum
- Country of Publication:
- United States
- Language:
- English
Similar Records
An Improved Fracture Mechanics-Informed Multiscale Thermomechanical Damage Model for Ceramic Matrix Composites
Woven ceramic matrix composite surrogate model based on physics-informed recurrent neural network
High-fidelity micromechanical modeling of the effects of defects on damage and creep behavior in single tow ceramic matrix composite
Conference
·
Tue Feb 11 23:00:00 EST 2020
· The Minerals, Metals & Materials Series TMS 2020 149th Annual Meeting & Exhibition Supplemental Proceedings
·
OSTI ID:2394693
Woven ceramic matrix composite surrogate model based on physics-informed recurrent neural network
Journal Article
·
Mon Nov 07 19:00:00 EST 2022
· Composite Structures
·
OSTI ID:2394692
High-fidelity micromechanical modeling of the effects of defects on damage and creep behavior in single tow ceramic matrix composite
Journal Article
·
Mon Dec 12 19:00:00 EST 2022
· Journal of Composite Materials
·
OSTI ID:1903392