Biaxial stress controlled three-dimensional helical cracks
文献类型：期刊论文
| 作者 | Wang, Li2,4; Ji, Xiang-Ying3; Wang, Nu; Wu, Jing1; Dong, Hua2,4; Du, Jiexing1; Zhao, Yong1; Feng, Xi-Qiao3; Jiang, Lei1,2 |
| 刊名 | NPG ASIA MATERIALS
 |
| 出版日期 | 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 |
| WOS记录号 | WOS:000303612500003 |
| 出版者 | NATURE PUBLISHING GROUP |
| 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). |
入库方式： OAI收割
来源：化学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。