| Understanding the tensile fracture of deeply-notched metallic glasses | |
| Yang, Guannan1; Qu, Ruitao2; Xu, Guangdong1; Li, Quanzhen1; Cui, Chengqiang1; Zhang, Zhefeng2 | |
| Corresponding Author | Cui, Chengqiang(cqcui@gdut.edu.cn) ; Zhang, Zhefeng(zhfzhang@imr.ac.cn) |
| 2020-12-15 | |
| Source Publication | INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES
 |
| ISSN | 0020-7683 |
| Volume | 207Pages:70-81 |
| Abstract | Deeply-notched metallic glasses can achieve significantly enhanced nominal tensile strain and strength under tension, and show the characteristics of dimples and "cup-and-cone" morphology on the fractographs. It has been expected that this deep-notch enhancement effect is resulted from the suppressed shear banding. In this study, we provided another interpretation for this effect through stress/strain field analyses based on the ellipse criterion. The results revealed the existence of relatively low but highly dispersed stress/strain instead of highly enhanced and localized stress/strain in deeply-notched metallic glasses, and therefore the actual stress is much lower than the nominal value. Owing to the positive third principal stress condition, the failure angle predicted by the ellipse criterion shifted from 45 degrees at the edge of the notch to 90 degrees at the center of the specimen, which was consistent with the "cup-and-cone" fracture morphology. These findings clarify the very high nominal stress/strain and special fracture process in deeply-notched metallic glasses. Our work provides a useful method to predict the shear-to-tensile failure mode transition of metallic glasses under complex loading conditions. (C) 2020 Published by Elsevier Ltd. |
| Keyword | Metallic glasses Deep notch Shear band Ellipse criterion Fracture |
| Funding Organization | National Natural Science Foundation of China ; Fostering Talents Foundation of Guangdong University of Technology |
| DOI | 10.1016/j.ijsolstr.2020.10.004 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[61874155] ; National Natural Science Foundation of China[51771205] ; Fostering Talents Foundation of Guangdong University of Technology[262511006] |
| WOS Research Area | Mechanics |
| WOS Subject | Mechanics |
| WOS ID | WOS:000591771900006 |
| Publisher | PERGAMON-ELSEVIER SCIENCE LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/141376 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Cui, Chengqiang; Zhang, Zhefeng |
| Affiliation | 1.Guangdong Univ Technol, State Key Lab Precis Elect Mfg Technol & Equipmen, Guangzhou 510006, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Lab Fatigue & Fracture Mat, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Yang, Guannan,Qu, Ruitao,Xu, Guangdong,et al. Understanding the tensile fracture of deeply-notched metallic glasses[J]. INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,2020,207:70-81. |
| APA | Yang, Guannan,Qu, Ruitao,Xu, Guangdong,Li, Quanzhen,Cui, Chengqiang,&Zhang, Zhefeng.(2020).Understanding the tensile fracture of deeply-notched metallic glasses.INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES,207,70-81. |
| MLA | Yang, Guannan,et al."Understanding the tensile fracture of deeply-notched metallic glasses".INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES 207(2020):70-81. |
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