Knowledge Management System of Institue of Mechanics, CAS
| Investigation Of Mode Ii Crack Growth Following A Very High Speed Impact | |
Ma W(马维) ; Duan ZP(段祝平); Ma, W (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China.
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| Source Publication | Journal of Mechanics of Materials And Structures
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| 2008 | |
| Volume | 3Issue:2Pages:271-290 |
| ISSN | 1559-3959 |
| Abstract | A recoverable plate impact testing technology has been developed for studying fracture mechanisms of mode II crack. With this technology, a single duration stress pulse with submicrosecond duration and high loading rates, up to 10(8) MPam(1/2)s(-1), can be produced. Dynamic failure tests of Hard-C 60# steel were carried out under asymmetrical impacting conditions with short stress-pulse loading. Experimental results show that the nucleation and growth of several microcracks ahead of the crack tip, and the interactions between them, induce unsteady crack growth. Failure mode transitions during crack growth, both from mode I crack to mode II and from brittle to ductile fracture, were observed. Based on experimental observations, a discontinuous crack growth model was established. Analysis of the crack growth mechanisms using our model shows that the shear crack extension is unsteady when the extending speed is between the Rayleigh wave speed c(R) and the shear wave speed c(S). However, when the crack advancing speed is beyond c(S), the crack grows at a steady intersonic speed approaching root 2c(S). It also shows that the transient mechanisms, such as nucleation, growth, interaction and coalescence among microcracks, make the main crack speed jump from subsonic to intersonic and the steady growth of all the subcracks causes the main crack to grow at a stable intersonic speed. |
| Keyword | Plate Impact Tests Dynamic Fracture Failure Mode Transition Intersonic Crack Extension Discontinuous Crack Growth Model Dynamic Fracture Propagation Transitions Initiation Plate |
| DOI | 10.2140/jomms.2008.3.271 |
| URL | 查看原文 |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000256438800005 |
| WOS Keyword | DYNAMIC FRACTURE ; PROPAGATION ; TRANSITIONS ; INITIATION ; PLATE |
| WOS Research Area | Materials Science ; Mechanics |
| WOS Subject | Materials Science, Multidisciplinary ; Mechanics |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/26022 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Ma, W (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China. |
| Recommended Citation GB/T 7714 | Ma W,Duan ZP,Ma, W . Investigation Of Mode Ii Crack Growth Following A Very High Speed Impact[J]. Journal of Mechanics of Materials And Structures,2008,3,2,:271-290. |
| APA | Ma W,Duan ZP,&Ma, W .(2008).Investigation Of Mode Ii Crack Growth Following A Very High Speed Impact.Journal of Mechanics of Materials And Structures,3(2),271-290. |
| MLA | Ma W,et al."Investigation Of Mode Ii Crack Growth Following A Very High Speed Impact".Journal of Mechanics of Materials And Structures 3.2(2008):271-290. |
| Files in This Item: | Download All | |||||
| File Name/Size | DocType | Version | Access | License | ||
| ja495.pdf（2350KB） | 期刊论文 | 出版稿 | 开放获取 | CC BY-NC-SA | View Download | |
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