Damage Localization--A Precursor to Failure

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	Damage Localization--A Precursor to Failure
	Bai YL(白以龙); Xu XH; Xia MF; Ke FJ; Bai YL(白以龙)
	2005-10-26
会议名称	International Conference on Mechanical Engineering and Mechanics
会议日期	OCT 26-28, 2005
会议地点	Nanjing Univ Sci & Technol, Nanjing, PEOPLES R CHINA
通讯作者	白以龙
中文摘要	This paper reviews the concept of damage localization and its application to time-independent (quasi-static) and time-dependent processes in heterogeneous materials. For quasi-static process in a heterogeneous material with Weibull distribution, damage can be expressed by a function of state variable. Accordingly, the criterion for damage localization depends on Weibull modulus m. In particular, damage localization can appear even though stress gradient remains fixed and it is closely related to strain localization. For time-dependent process, damage evolution law can be expressed by a function of stress and damage f(sigma,D). Accordingly, the criterion for damage localization can be expressed by f(D)>f/D. Provided damage evolution law can be expressed by kinetics of microdamage, it is found that intrinsic Deborah number D* plays a key role in damage localization. The criterion for damage localization has been applied to two extremes of time-dependent processes: spallation under wave loading and creep.
收录类别	CPCI-S
会议录	Proceedings of the International Conference on Mechanical Engineering and Mechanics,2005,1&2:29-33
学科主题	力学
语种	英语
WOS记录号	WOS:000232717800005
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/13832]
专题	力学研究所_力学所知识产出(1956-2008)
通讯作者	Bai YL(白以龙)
推荐引用方式 GB/T 7714	Bai YL,Xu XH,Xia MF,et al. Damage Localization--A Precursor to Failure[C]. 见:International Conference on Mechanical Engineering and Mechanics. Nanjing Univ Sci & Technol, Nanjing, PEOPLES R CHINA. OCT 26-28, 2005.