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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

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

A Reactive Molecular Dynamics Study on the Mechanical Properties of Alumina/Carbon Nanotube Composites
An Improved Fracture Mechanics-informed Multiscale Thermomechanical Damage Model for Ceramic Matrix Composites
An Integrated Computational and Experimental Framework to Understand the Competing Failure Mechanisms in Metal Matrix Composites
Computational Polyethylene-ceramic Composite Plate Design and Optimization
Developing a Virtual Damage Sensor Using a Multiscale Coupled Electro-mechanical FE Model of a Piezoelectric Material

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