Fractals and Scaling in Fracture Induced by Microcrack Coalescence

doi:10.1080/09500830500153917

IMECH-IR > 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); Lu, C (reprint author), Univ Sydney, Sch Aerosp Mech & Mechatron Engn J07, CAMT, Sydney, NSW 2006, Australia.
发表期刊	Philosophical Magazine Letters
	2005
卷号	85 期号:2 页码:67-75
ISSN	0950-0839
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.
学科领域	力学
DOI	10.1080/09500830500153917
收录类别	SCI
语种	英语
WOS记录号	WOS:000230131900003
关键词[WOS]	SELF-ORGANIZED CRITICALITY ; EVOLUTION-INDUCED CATASTROPHE ; STATISTICAL PROPERTIES ; DISORDERED MATERIALS ; AVALANCHE BEHAVIOR ; DIMENSION ; SURFACES ; FAILURE ; MODEL ; SENSITIVITY
WOS研究方向	Physics
WOS类目	Physics, Condensed Matter
引用统计	被引频次：7[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/311007/16591
专题	力学所知识产出(1956-2008)
通讯作者	Lu, C (reprint author), Univ Sydney, Sch Aerosp Mech & Mechatron Engn J07, CAMT, Sydney, NSW 2006, Australia.
推荐引用方式 GB/T 7714	Lu CS,Mai YW,Bai YL,et al. 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,&Lu, C .(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.

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