Biaxial stress controlled three-dimensional helical cracks

doi:10.1038/am.2012.26

CORC > 化学研究所 > 中国科学院化学研究所

	Biaxial stress controlled three-dimensional helical cracks
	Wang, Li 2,4; Ji, Xiang-Ying 3; Wang, Nu ; Wu, Jing 1; Dong, Hua 2,4; Du, Jiexing 1; Zhao, Yong 1; Feng, Xi-Qiao 3; Jiang, Lei 1,2
刊名	NPG ASIA MATERIALS
	2012-04-01
卷号	4
关键词	Biaxial Stress Crack Helical
ISSN号	1884-4049
DOI	10.1038/am.2012.26
英文摘要	Cracks are Janus-faced, which cause material failure on one hand and serve as a powerful approach for material processing on the other. To predict cracks and control them in a desired manner, foundational fracture mechanisms are continuously being pursued, based on simplified modes of planar cracks. In reality, cracks usually occur in a three-dimensional (3D) irregular manner. Prediction of 3D fractures is of particular significance for understanding the fundamental fracture mechanisms. However, controlling cracks in typical 3D modes is rare. Here we report that controllable 3D helical cracks on heterogeneous spindle knots are induced by biaxial thermal stresses. The thermal expansion mismatch between the tough core and brittle shell during the heating process generates biaxial stresses in the axial and circumferential directions. Surface cleavage and interface delamination driven by the release rate of elastic strain energy are harmonized due to the unique spindle geometry and cooperate to produce a 3D helical crack. This finding is helpful for understanding complex cracking mechanisms and provides a promising prospect for controlling or eliminating 3D cracks. NPG Asia Materials (2012) 4, e14; doi:10.1038/am.2012.26; published online 20 April 2012
语种	英语
出版者	NATURE PUBLISHING GROUP
WOS记录号	WOS:000303612500003
内容类型	期刊论文
源URL	[http://ir.iccas.ac.cn/handle/121111/49211]
专题	中国科学院化学研究所
通讯作者	Zhao, Yong
作者单位	1.Beihang Univ, Sch Chem & Environm, Minist Educ, Key Lab Bioinspired Smart Interfacial Sci & Tech, Beijing 100191, Peoples R China 2.Chinese Acad Sci, Inst Chem, Key Lab Organ Solids, BNLMS, Beijing 100080, Peoples R China 3.Tsinghua Univ, Dept Engn Mech, AML, Beijing 100084, Peoples R China 4.Chinese Acad Sci, Grad Univ, Beijing, Peoples R China
推荐引用方式 GB/T 7714	Wang, Li,Ji, Xiang-Ying,Wang, Nu,et al. Biaxial stress controlled three-dimensional helical cracks[J]. NPG ASIA MATERIALS,2012,4.
APA	Wang, Li.,Ji, Xiang-Ying.,Wang, Nu.,Wu, Jing.,Dong, Hua.,...&Jiang, Lei.(2012).Biaxial stress controlled three-dimensional helical cracks.NPG ASIA MATERIALS,4.
MLA	Wang, Li,et al."Biaxial stress controlled three-dimensional helical cracks".NPG ASIA MATERIALS 4(2012).