Statistical and stochastic description of microvoid evolution observed in dynamic failure of ductile materials

CORC > 力学研究所 > 中国科学院力学研究所 > 力学所知识产出(1956-2008)

	Statistical and stochastic description of microvoid evolution observed in dynamic failure of ductile materials
	Huang ZP(黄筑平); Li HL
刊名	Key Engineering Materials
	2000
卷号	177-180 期号:Advances in Engineering Plasticity 页码:1-12
ISSN号	1013-9826
通讯作者	Huang, ZP (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
合作状况	国内
中文摘要	A brief review is presented of statistical approaches on microdamage evolution. An experimental study of statistical microdamage evolution in two ductile materials under dynamic loading is carried out. The observation indicates that there are large differences in size and distribution of microvoids between these two materials. With this phenomenon in mind, kinetic equations governing the nucleation and growth of microvoids in nonlinear rate-dependent materials are combined with the balance law of void number to establish statistical differential equations that describe the evolution of microvoids' number density. The theoretical solution provides a reasonable explanation of the experimentally observed phenomenon. The effects of stochastic fluctuation which is influenced by the inhomogeneous microscopic structure of materials are subsequently examined (i.e. stochastic growth model). Based on the stochastic differential equation, a Fokker-Planck equation which governs the evolution of the transition probability is derived. The analytical solution for the transition probability is then obtained and the effects of stochastic fluctuation is discussed. The statistical and stochastic analyses may provide effective approaches to reveal the physics of damage evolution and dynamic failure process in ductile materials.
学科主题	力学
类目[WOS]	Materials Science, Ceramics ; Mechanics ; Metallurgy & Metallurgical Engineering ; Materials Science, Composites
研究领域[WOS]	Materials Science ; Mechanics ; Metallurgy & Metallurgical Engineering
关键词[WOS]	BRITTLE-FRACTURE ; SOLIDS ; MODELS
收录类别	SCI
原文出处	http://www.scientific.net/KEM.177-180.1
语种	英语
WOS记录号	WOS:000089404200001
公开日期	2007-06-15 ; 2007-12-05 ; 2009-06-23
内容类型	期刊论文
源URL	[http://dspace.imech.ac.cn/handle/311007/17680]
专题	力学研究所_力学所知识产出(1956-2008)
推荐引用方式 GB/T 7714	Huang ZP,Li HL. Statistical and stochastic description of microvoid evolution observed in dynamic failure of ductile materials[J]. Key Engineering Materials,2000,177-180(Advances in Engineering Plasticity):1-12.
APA	Huang ZP,&Li HL.(2000).Statistical and stochastic description of microvoid evolution observed in dynamic failure of ductile materials.Key Engineering Materials,177-180(Advances in Engineering Plasticity),1-12.
MLA	Huang ZP,et al."Statistical and stochastic description of microvoid evolution observed in dynamic failure of ductile materials".Key Engineering Materials 177-180.Advances in Engineering Plasticity(2000):1-12.