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| Mechanical effects of the self-organization of dislocations and related critical characteristics | |
Huang GJ(黄国君) ; Duan ZP(段祝平); Huang, GJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Non Linear Mech, Beijing 100080, Peoples R China.
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| Source Publication | Acta Mechanica Sinica
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| 2000 | |
| Volume | 16Issue:2Pages:173-182 |
| ISSN | 0567-7718 |
| Abstract | The effects of the dislocation pattern formed due to the self-organization of the dislocations in crystals on the macroscopic hardening and dynamic internal friction (DIF) during deformation are studied. The classic dislocation models for the hardening and DIF corresponding to the homogeneous dislocation configuration are extended to the case for the non-homogeneous one. In addition, using the result of dislocation patterning deduced from the non-linear dlislocation dynamics model for single slip, the correlation between the dislocation pattern and hardening as well as DIF is obtained. It is shown that in the case of the tension with a constant strain rate, the bifurcation point of dislocation patterning corresponds to the turning point in the stress versus strain and DIF versus strain curves. This result along with the critical characteristics of the macroscopic behavior near the bifurcation point is microscopically and macroscopically in agreement with the experimental findings on mono-crystalline pure aluminum at temperatures around 0.5T(m). The present study suggests that measuring the DIF would be a sensitive and useful mechanical means in order to study the critical phenomenon of materials during deformation. |
| Subject Area | 力学 |
| Indexed By | SCI ; EI ; CSCD |
| Language | 英语 |
| WOS ID | WOS:000087513300009 |
| WOS Research Area | Engineering ; Mechanics |
| WOS Subject | Engineering, Mechanical ; Mechanics |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://dspace.imech.ac.cn/handle/311007/16365 |
| Collection | 力学所知识产出(1956-2008) |
| Corresponding Author | Huang, GJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Non Linear Mech, Beijing 100080, Peoples R China. |
| Recommended Citation GB/T 7714 | Huang GJ,Duan ZP,Huang, GJ . Mechanical effects of the self-organization of dislocations and related critical characteristics[J]. Acta Mechanica Sinica,2000,16,2,:173-182. |
| APA | 黄国君,段祝平,&Huang, GJ .(2000).Mechanical effects of the self-organization of dislocations and related critical characteristics.Acta Mechanica Sinica,16(2),173-182. |
| MLA | 黄国君,et al."Mechanical effects of the self-organization of dislocations and related critical characteristics".Acta Mechanica Sinica 16.2(2000):173-182. |
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