On composite-structure weaknesses: Part I. Simulation, properties, and numerical approach

doi:10.1007/s11661-002-0052-2

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	On composite-structure weaknesses: Part I. Simulation, properties, and numerical approach
	Li, XD
刊名	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
	2002-07
卷号	33 期号:7 页码:2205-2215
ISSN号	1073-5623
DOI	10.1007/s11661-002-0052-2
英文摘要	Composite material samples were created by means of computer simulation to duplicate short-fiber-reinforced metal-matrix composites (MMCs). Each sample contains a fairly large number of Voronoi grains and ellipsoidal short fibers, which orient and distribute in a random manner, to mimic composite microstructures for investigating the coherent interconnections of composite-structure weaknesses (CSWs) with local microstructure. It is supposed that the samples are subjected to coupled boundary traction due to mechanical loading and thermal cycling. A Kroner-Kneer structure-based model and Waldvogel-Rodin algorithm were used for numerical computations of the mesoscopic stress distribution in constituent grains. The computations are based on the grain-volume average of local fields. Polycrystal elastic/thermal properties and effective elastic/thermal properties of simulated MMC samples were predicted, respectively, in terms of micromechanics models, in favor of incorporating the influences of macroscopic material properties on the formation of CSWs. An analytically-numerically-based approach is proposed for analyzing peak mesoscopic stress and strain distributions in short fibers. Three crucial aspects constitute a kernel of the approach, i.e., (1) segmentation of short fibers, (2) establishment of the geometric relations of a short fiber to the surrounding grains, and (3) the local nature of micromechanics. The analytically-numerically-based approach takes into account the grain orientation, fiber orientation, grain geometry, fiber geometry, and macroscopic properties of simulated MMC samples. The Numerical Assessment of Computer-Imitated Weaknesses-MMCs (NACIW-MMCs) software program has been developed for performing simulation of the microstructure of short-fiber-reinforced MMCs and executing all involved numerical computations.
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000176532600032
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/35908]
专题	兰州理工大学
通讯作者	Li, XD
作者单位	Gansu Univ Technol, Coll Mat Sci & Engn, Lanzhou 730050, Gansu Province, Peoples R China
推荐引用方式 GB/T 7714	Li, XD. On composite-structure weaknesses: Part I. Simulation, properties, and numerical approach[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2002,33(7):2205-2215.
APA	Li, XD.(2002).On composite-structure weaknesses: Part I. Simulation, properties, and numerical approach.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,33(7),2205-2215.
MLA	Li, XD."On composite-structure weaknesses: Part I. Simulation, properties, and numerical approach".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 33.7(2002):2205-2215.