CSE Community Seminar
December 6, 2024, 12-1PM
Conference Room 45-432 in Building 45
A Large-Scale Computational Thermo-Chemo-Mechanics Simulation Framework for the Analysis of Material and Structural Failures in Hypersonic Environments
Daniel Pickard
PhD Student, Aeronautics and Astronautics, MIT
Abstract:
In this seminar, we present a thermo-chemo-mechanics computational framework for the analysis of material and structural degradation and failure under hypersonic flight conditions. The approach is based on a unified discontinuous Galerkin formulation of the coupled equations describing the solid mechanics, the heat transfer, and the chemical reaction problems. The framework incorporates a broad spectrum of constitutive response models for complex phenomena such as surface ablation, oxidation, pyrolysis, inelastic deformation, fracture, and thermochemical transport or the resistance to transport across crack surfaces.
In the second portion of this talk, we demonstrate the versatility of our computational framework with simulations tailored to the hypersonic environment, focusing on ultra-high temperature ceramic fracture and coating delamination. We present quasi-static, oxidation-driven delamination simulations that provide a detailed, three-dimensional description of the evolving delamination front and the associated fracture-dependent oxidation problem. The numerical results are compared with experimental observations and provide mechanistic insight into the driving force for delamination. Additionally, we present thermal shock-induced cracking simulations, which highlight our framework’s capability to model complex fracture morphologies. Our computational studies showcase potential applications of this methodology to the analysis of materials exposed to a variety of extreme conditions.
December 6, 2024, CSE Community Seminar
Daniel Pickard
PhD Student, Aeronautics and Astronautics, MIT