Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure

doi:10.1016/j.mechmat.2005.05.009

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	Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure
	Wang HY(汪海英); Bai YL(白以龙); Xia MF(夏蒙棼); Ke FJ(柯孚久); Wang, HY (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
发表期刊	Mechanics of Materials
	2006
卷号	38 期号:1-2 页码:57-67
ISSN	0167-6636
摘要	The process of damage evolution concerns various scales, from micro- to macroscopic. How to characterize the trans-scale nature of the process is on the challenging frontiers of solid mechanics. In this paper, a closed trans-scale formulation of damage evolution based on statistical microdamage mechanics is presented. As a case study, the damage evolution in spallation is analyzed with the formulation. Scaling of the formulation reveals that the following dimensionless numbers: reduced Mach number M, damage number S, stress wave Fourier number P, intrinsic Deborah number D, and the imposed Deborah number De, govern the whole process of deformation and damage evolution. The evaluation of P and the estimation of temperature increase show that the energy equation can be ignored as the first approximation in the case of spallation. Hence, apart from the two conventional macroscopic parameters: the reduced Mach number M and damage number S, the damage evolution in spallation is mainly governed by two microdamage-relevant parameters: the Deborah numbers D* and De. Higher nucleation and growth rates of microdamage accelerate damage evolution, and result in higher damage in the target plate. In addition, the mere variation in nucleation rate does not change the spatial distribution of damage or form localized rupture, while the increase of microdamage growth rate localizes the damage distribution in the target plate, which can be characterized by the imposed Deborah number De.
学科领域	力学
DOI	10.1016/j.mechmat.2005.05.009
收录类别	SCI
语种	英语
WOS记录号	WOS:000233519500007
关键词[WOS]	SPALL DAMAGE ; SOLIDS ; METALS
WOS研究方向	Materials Science ; Mechanics
WOS类目	Materials Science, Multidisciplinary ; Mechanics
引用统计	被引频次：8[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/17512
专题	力学所知识产出(1956-2008)
通讯作者	Wang, HY (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100080, Peoples R China.
推荐引用方式 GB/T 7714	Wang HY,Bai YL,Xia MF,et al. Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure[J]. Mechanics of Materials,2006,38,1-2,:57-67.
APA	汪海英,白以龙,夏蒙棼,柯孚久,&Wang, HY .(2006).Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure.Mechanics of Materials,38(1-2),57-67.
MLA	汪海英,et al."Microdamage Evolution, Energy Dissipation and Their Trans-Scale Effects on Macroscopic Failure".Mechanics of Materials 38.1-2(2006):57-67.

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