Fractals and Scaling in Fracture Induced by Microcrack Coalescence
文献类型：期刊论文
| 作者 | Lu CS(卢春生) ; Mai YW; Bai YL(白以龙)
|
| 刊名 | Philosophical Magazine Letters
 |
| 出版日期 | 2005 |
| 卷号 | 85期号:2页码:67-75 |
| 通讯作者邮箱 | chunsheng.lu@aeromech.usyd.edu.au |
| 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 |
| 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. |
入库方式： OAI收割
来源：力学研究所
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