Power law singularity of catastrophic rupture in heterogeneous media

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	Power law singularity of catastrophic rupture in heterogeneous media
	Hao SW(郝圣旺); Lu MF; Ke FJ(柯孚久); Xia MF(夏蒙芬); Bai YL(白以龙)
	2009
会议名称	Mesomechanics 2009 Conference
会议日期	JUN 24-26, 2009
会议地点	Oxford, ENGLAND
通讯作者	Bai, YL (reprint author), CAS, Inst Mech, State Key Lab Nonlinear Mech, Beijing 100190, Peoples R China.
中文摘要	Catastrophic rupture in heterogeneous media, such as earthquake in crust, has long been a topic of scientific and societal importance. However, there has been no reliable approach to its prediction. Recently, our experimental study of rocks unveiled a power law singularity ahead of catastrophic rupture, namely the response of the rock specimen R (the ratio of the increments of sample deformation u and controlling crosshead displacement U) can be expressed as R similar to (1-U/U(F)) (-beta) with beta = 0.51+/-0.10 (mean+/-s.d.) ahead of the catastrophic rupture U(F). Numerical simulations also demonstrate the power law singularity ahead of catastrophic rupture. Theoretical analysis gives the power law singularity with the critical exponent beta = 1/2. In addition, other tests with cement specimens showing gradual failure without catastrophic rupture do not demonstrate such a singularity. (C) 2009 Elsevier B.V. All rights reserved
收录类别	CPCI-S ; EI
会议网址	10.1016/j.proeng.2009.06.031
会议录	MESOMECHANICS 2009
会议录出版者	ELSEVIER SCIENCE BV
会议录出版地	AMSTERDAM
语种	英语
WOS记录号	WOS:000275988600030
内容类型	会议论文
源URL	[http://dspace.imech.ac.cn/handle/311007/58882]
专题	力学研究所_非线性力学国家重点实验室
推荐引用方式 GB/T 7714	Hao SW,Lu MF,Ke FJ,et al. Power law singularity of catastrophic rupture in heterogeneous media[C]. 见:Mesomechanics 2009 Conference. Oxford, ENGLAND. JUN 24-26, 2009.10.1016/j.proeng.2009.06.031.