Fractals and Scaling in Fracture Induced by Microcrack Coalescence

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)

	Fractals and Scaling in Fracture Induced by Microcrack Coalescence
	Lu CS(卢春生); Mai YW; Bai YL(白以龙)
刊名	Philosophical Magazine Letters
	2005
通讯作者邮箱	chunsheng.lu@aeromech.usyd.edu.au
卷号	85 期号:2 页码:67-75
ISSN号	0950-0839
通讯作者	Lu, C (reprint author), Univ Sydney, Sch Aerosp Mech & Mechatron Engn J07, CAMT, Sydney, NSW 2006, Australia.
中文摘要	A numerical model is proposed to simulate fracture induced by the coalescence of numerous microcracks, in which the condition for coalescence between two randomly nucleated microcracks is determined in terms of a load-sharing principle. The results of the simulation show that, as the number density of nucleated microcracks increases, stochastic coalescence first occurs followed by a small fluctuation, and finally a newly nucleated microcrack triggers a cascade coalescence of microcracks resulting in catastrophic failure. The fracture profiles exhibit self-affine fractal characteristics with a universal roughness exponent, but the critical damage threshold is sensitive to details of the model. The spatiotemporal distribution of nucleated microcracks in the vicinity of critical failure follows a power-law behaviour, which implies that the microcrack system may evolve to a critical state.
学科主题	力学
类目[WOS]	Physics, Condensed Matter
研究领域[WOS]	Physics
关键词[WOS]	SELF-ORGANIZED CRITICALITY ; EVOLUTION-INDUCED CATASTROPHE ; STATISTICAL PROPERTIES ; DISORDERED MATERIALS ; AVALANCHE BEHAVIOR ; DIMENSION ; SURFACES ; FAILURE ; MODEL ; SENSITIVITY
收录类别	SCI
语种	英语
WOS记录号	WOS:000230131900003
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/311007/16591]
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	Lu CS,Mai YW,Bai YL. Fractals and Scaling in Fracture Induced by Microcrack Coalescence[J]. Philosophical Magazine Letters,2005,85(2):67-75.
APA	卢春生,Mai YW,&白以龙.(2005).Fractals and Scaling in Fracture Induced by Microcrack Coalescence.Philosophical Magazine Letters,85(2),67-75.
MLA	卢春生,et al."Fractals and Scaling in Fracture Induced by Microcrack Coalescence".Philosophical Magazine Letters 85.2(2005):67-75.