Mechanical effects of the self-organization of dislocations and related critical characteristics

IMECH-IR > 力学所知识产出(1956-2008)

	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.
发表期刊	Acta Mechanica Sinica
	2000
卷号	16 期号:2 页码:173-182
ISSN	0567-7718
摘要	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.
学科领域	力学
收录类别	SCI ; EI ; CSCD
语种	英语
WOS记录号	WOS:000087513300009
WOS研究方向	Engineering ; Mechanics
WOS类目	Engineering, Mechanical ; Mechanics
引用统计
文献类型	期刊论文
条目标识符	http://dspace.imech.ac.cn/handle/311007/16365
专题	力学所知识产出(1956-2008)
通讯作者	Huang, GJ (reprint author), Chinese Acad Sci, Inst Mech, State Key Lab Non Linear Mech, Beijing 100080, Peoples R China.
推荐引用方式 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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