|About this Abstract
||2016 TMS Annual Meeting & Exhibition
||Fatigue in Materials: Fundamentals, Multiscale Modeling and Prevention
||Thermal Fatigue as the Origin of Rock Break-up on Asteroids
||Kavan Hazeli, Stefanos Papanikolaou, Charles El Mir, Marco Delbo, K. T. Ramesh
|On-Site Speaker (Planned)
Space missions and thermal infrared observations have revealed that asteroids are covered by a layer of unconsolidated rocks that sit atop a layer of bedrock known as regolith. The origin and evolution of regolith is a matter of debate. In addition to space weathering, thermal fatigue processes may have a significant contribution to formation and evolution of regolith on asteroids since they experience extreme diurnal temperatures variation. To assess the role of thermal fatigue, we present in situ full-field strain map evolution as a function of temperature and microstructure and we construct a microstructure-based model that quantitatively compares with our experimental observations. We observe and theoretically justify the underlying mechanisms associated with thermal fatigue crack propagation in astoroidal rocks.
||Planned: Publication Outside of TMS (Indicate publication title and publisher if known.)