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| Fracture criteria for combined cleavage and dislocation emission | |
Wang ZQ(王自强) ; Wang, TC (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA.
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| Source Publication | Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties
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| 1996 | |
| Volume | 74Issue:4Pages:983-1001 |
| ISSN | 0141-8610 |
| Abstract | A general theory of fracture criteria for mixed dislocation emission and cleavage processes is developed based on Ohr's model. Complicated cases involving mixed-mode loading are considered. Explicit formulae are proposed for the critical condition of crack cleavage propagation after a number of dislocation emissions. The effects of crystal orientation, crack geometry and load phase angle on the apparent critical energy release rates and the total number of the emitted dislocations at the initiation of cleavage are analysed in detail. In order to evaluate the effects of nonlinear interaction between the slip displacement and the normal separation, an analysis of fracture criteria for combined dislocation emission and cleavage is presented on the basis of the Peierls framework. The calculation clearly shows that the nonlinear theory gives slightly high values of the critical apparent energy release rate G(c) for the same load phase angle. The total number N of the emitted dislocations at the onset of cleavage given by nonlinear theory is larger than that of linear theory. |
| Keyword | Crack-tip Nucleation |
| Indexed By | SCI ; EI |
| Language | 英语 |
| WOS ID | WOS:A1996VL42300010 |
| WOS Keyword | CRACK-TIP ; NUCLEATION |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering ; Physics |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering ; Physics, Applied ; Physics, Condensed Matter |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/39104 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Wang, TC (reprint author), CHINESE ACAD SCI,INST MECH,LNM,BEIJING 100080,PEOPLES R CHINA. |
| Recommended Citation GB/T 7714 | Wang ZQ,Wang, TC . Fracture criteria for combined cleavage and dislocation emission[J]. Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties,1996,74,4,:983-1001. |
| APA | 王自强,&Wang, TC .(1996).Fracture criteria for combined cleavage and dislocation emission.Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties,74(4),983-1001. |
| MLA | 王自强,et al."Fracture criteria for combined cleavage and dislocation emission".Philosophical Magazine A-Physics of Condensed Matter Structure Defects and Mechanical Properties 74.4(1996):983-1001. |
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