|About this Abstract
||2017 TMS Annual Meeting & Exhibition
||Characterization of Minerals, Metals, and Materials
||In Situ Mechanical and Thermal Damage Mechanisms Investigation in Asteoridal Rocks
||Jefferson Cuadra, Kavan Hazeli, Harry Martz, KT Ramesh
|On-Site Speaker (Planned)
Rock fracturing on the surface of planetary bodies has traditionally been attributed to the meteorite impacts. Note that the ejecta velocities for small kilometer-sized asteroids typically exceed the gravitational escape velocity, which limits the amount of retained ejecta following a high-velocity impact event. The objective of this study, therefore, is to identify and quantify the sensitivity of meteorite samples to crack initiation and propagation as a result of diurnal temperature variations. We use in situ X-ray computed tomography to obtain quantitative information of the damage process under thermal fatigue and mechanical loading. The presented results demonstrate that the dissimilarity in physical properties of the constituent phases results to a different damage pattern under thermal fatigue versus mechanical stress. The presented damages assessment methodology, which is capable of resolving 3D geometry, shows promise in differentiating of the dominant damage mechanisms activated under mechanical disruption against thermal disaggregation in heterogeneous materials.
||Planned: Stand-alone book in which only your symposium’s papers would appear (indicate title in comments section below)