Investigation Of Mode Ii Crack Growth Following A Very High Speed Impact
文献类型：期刊论文
| 作者 | Ma W(马维) ; Duan ZP(段祝平)
|
| 刊名 | Journal of Mechanics of Materials And Structures
 |
| 出版日期 | 2008 |
| 卷号 | 3期号:2页码:271-290 |
| 通讯作者邮箱 | watwm@imech.ac.cn ; zpduan@imech.ac.cn |
| 关键词 | Plate Impact Tests Dynamic Fracture Failure Mode Transition Intersonic Crack Extension Discontinuous Crack Growth Model Dynamic Fracture Propagation Transitions Initiation Plate |
| ISSN号 | 1559-3959 |
| 通讯作者 | Ma, W (reprint author), Chinese Acad Sci, Inst Mech, 15 Beisihuanxi Rd, Beijing 100080, Peoples R China. |
| 中文摘要 | 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. |
| 类目[WOS] | Materials Science, Multidisciplinary ; Mechanics |
| 研究领域[WOS] | Materials Science ; Mechanics |
| 关键词[WOS] | DYNAMIC FRACTURE ; PROPAGATION ; TRANSITIONS ; INITIATION ; PLATE |
| 收录类别 | SCI |
| 原文出处 | http://dx.doi.org/10.2140/jomms.2008.3.271 |
| 语种 | 英语 |
| WOS记录号 | WOS:000256438800005 |
| 公开日期 | 2009-08-03 ; 2009-09-14 |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/26022]  |
| 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 | Ma W,Duan ZP. 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.(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. |
入库方式： OAI收割
来源：力学研究所
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