@article{e3ef50855f0c4bf6a1df0d78b7edf40a,
title = "Stress field analysis in a stony meteorite under thermal fatigue and mechanical loadings",
abstract = "A micromechanical approach relying on 3D image-based finite element (FE) models, together with experimental testing, is employed to investigate the stress distribution in an L6 ordinary chondrite's microstructure subjected to thermal and mechanical loadings. An in-situ X-ray micro-computed tomography (micro-CT) setup capable of applying thermal and mechanical loads shed light on crack initiation mechanisms in chondrite samples. Micro-CT images were further used to reconstruct realistic microstructural models of the samples, which were transformed into FE models using an automated non-iterative mesh generation algorithm. FE approximation of stress fields showed that under mechanical loads, the stress often concentrates in matrix-particle interfacial regions with higher curvatures. This could result in the nucleation and eventually propagation of cracks in such regions. However, when the thermal cycling takes place, the stress concentrates more uniformly along with particle interfaces, resulting in their debonding from the surrounding matrix. Both observations were verified by experimental data obtained from in-situ micro-CT imaging.",
keywords = "Asteroidal rock, Finite element, Mechanical behavior, Thermal fatigue, X-ray micro-CT",
author = "B. Liang and Jefferson Cuadra and K. Hazeli and Soheil Soghrati",
note = "Funding Information: Soghrati and Liang acknowledge the support from the Air Force Office of Scientific Research (AFOSR) under grant number FA9550-17-1-0350 , as well as partial support from the Ohio State University {\textquoteright}s Simulation Innovation and Modeling Center (SIMCenter) and the allocation of computing time from the Ohio Supercomputer Center (OSC). Hazeli would like to thank Dr. Ramesh at the Johns Hopkins University. The experimental portion of this study was initiated during Hazeli's postdoctoral fellowship training under Dr. Ramesh's supervision and the financial support was provided by NASA's Solar System Exploration Research Virtual Institute (SSERVI) program. We would like to thank J. Hoskin, Collection Manager, and Dr. T. McCoy, Curator-in-Charge, Smithsonian Department of Mineral Sciences; Division of Meteorites for providing samples for this investigation. Parts of the experimental work task was performed under the auspices of the U.S. Department of Energy by Lawrence Livermore National Laboratory under Contract DE-AC52-07NA27344 ( LLNL-JRNL-748325 ). The authors would also like to acknowledge Advanced Light Source, which is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DEAC02-05CH11231 and to thank Drs. Alex Dooraghi, Harold Barnard, and Dula Parkinson for their support of the experimental work presented in this manuscript. Funding Information: Soghrati and Liang acknowledge the support from the Air Force Office of Scientific Research (AFOSR) under grant number FA9550-17-1-0350, as well as partial support from the Ohio State University's Simulation Innovation and Modeling Center (SIMCenter) and the allocation of computing time from the Ohio Supercomputer Center (OSC). Hazeli would like to thank Dr. Ramesh at the Johns Hopkins University. The experimental portion of this study was initiated during Hazeli's postdoctoral fellowship training under Dr. Ramesh's supervision and the financial support was provided by NASA's Solar System Exploration Research Virtual Institute (SSERVI) program. We would like to thank J. Hoskin, Collection Manager, and Dr. T. McCoy, Curator-in-Charge, Smithsonian Department of Mineral Sciences; Division of Meteorites for providing samples for this investigation. Parts of the experimental work task was performed under the auspices of the U.S. Department of Energy byLawrence Livermore National Laboratory under ContractDE-AC52-07NA27344 (LLNL-JRNL-748325). The authors would also like to acknowledge Advanced Light Source, which is supported by the Director, Office of Science, Office of Basic Energy Sciences, of the U.S. Department of Energy under Contract No. DEAC02-05CH11231 and to thank Drs. Alex Dooraghi, Harold Barnard, and Dula Parkinson for their support of the experimental work presented in this manuscript. Publisher Copyright: {\textcopyright} 2019 Elsevier Inc.",
year = "2020",
month = jan,
day = "1",
doi = "10.1016/j.icarus.2019.07.015",
language = "English (US)",
volume = "335",
journal = "Icarus",
issn = "0019-1035",
publisher = "Academic Press Inc.",
}