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	Numerical Simulation of Graphite Properties Using X-ray Tomography and Fast Multipole Boundary Element Method
	Wang, H. T. ; Hall, G. ; Yu, S. Y. ; Yao, Z. H.
	2010-10-12 ; 2010-10-12
关键词	boundary element fast multipole nuclear graphite microstructure INTEGRAL-EQUATION METHOD CARBON-NANOTUBE COMPOSITES NUCLEAR GRAPHITE REINFORCED COMPOSITES NEUTRON-IRRADIATION ELECTROMAGNETIC SCATTERING POLYCRYSTALLINE GRAPHITE MECHANICAL-PROPERTIES EXTRACTION PROGRAM POTENTIAL PROBLEMS Engineering, Multidisciplinary Mathematics, Interdisciplinary Applications
中文摘要	Graphite materials are widely used in gas-cooled nuclear reactors as both moderators and reflectors. The graphite properties change when the microstructure damage occurs due to the in-core radiation and oxidation, thereby having a strong impact oil the service life of graphite. In this paper, the X-ray tomography and the boundary element method (BEM) are introduced to the microstructure modeling and numerical simulations of both the mechanical and thermal property changes of nuclear graphite due to radiolytic oxidation. The model is established by the three-dimensional X-ray scan oil the isotropic nuclear graphite Gilsocarbon, which is used in the UK commercial reactors. The BEM is accelerated by the fast multipole method (FMM) in allowing large scale simulations of the model to be performed on one desktop computer. The efficiency of the fast multipole BEM is evaluated numerically in comparison with other algorithms. The effects of the volume fractional porosity on both the bulk Young's modulus and thermal conductivity of graphite are evaluated. The numerical results are compared with the experimental data due to radiolytic oxidation and good agreement is observed. It is demonstrated that the presented model and the associated simulation method are beneficial to the understanding of graphite property changes froth micro-structural views.
语种	英语 ; 英语
出版者	TECH SCIENCE PRESS ; NORCROSS ; 6825 JIMMY CARTER BLVD, STE 1850, NORCROSS, GA 30071 USA
内容类型	期刊论文
源URL	[http://hdl.handle.net/123456789/79308]
专题	清华大学
推荐引用方式 GB/T 7714	Wang, H. T.,Hall, G.,Yu, S. Y.,et al. Numerical Simulation of Graphite Properties Using X-ray Tomography and Fast Multipole Boundary Element Method[J],2010, 2010.
APA	Wang, H. T.,Hall, G.,Yu, S. Y.,&Yao, Z. H..(2010).Numerical Simulation of Graphite Properties Using X-ray Tomography and Fast Multipole Boundary Element Method..
MLA	Wang, H. T.,et al."Numerical Simulation of Graphite Properties Using X-ray Tomography and Fast Multipole Boundary Element Method".(2010).

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