A new dynamic model for study of dislocation pattern formation

IMECH-IR > 力学所知识产出(1956-2008)

	A new dynamic model for study of dislocation pattern formation
	Duan ZP(段祝平); Wang WB(王文标); Zheng QR; Huang GJ(黄国君); Chen DW; Duan, ZP (reprint author), CHINESE ACAD SCI,LNM,INST MECH,BEIJING 100080,PEOPLES R CHINA.
发表期刊	Acta Mechanica Sinica
	1996
卷号	12 期号:3 页码:200-212
ISSN	0567-7718
摘要	Based on the principle given in nonlinear diffusion-reaction dynamics, a new dynamic model for dislocation patterning is proposed by introducing a relaxation time to the relation between dislocation density and dislocation flux. The so-called chemical potential like quantities, which appear in the model can be derived from variation principle for free energy functional of dislocated media, where the free energy density function is expressed in terms of not only the dislocation density itself but also their spatial gradients. The Linear stability analysis on the governing equations of a simple dislocation density shows that there exists an intrinsic wave number leading to bifurcation of space structure of dislocation density. At the same time, the numerical results also demonstrate the coexistence and transition between different dislocation patterns.
关键词	Dislocation Patterning Diffusion Reaction Dynamics Variation Principle Bifurcation Analysis Metals
收录类别	SCI ; EI
语种	英语
WOS记录号	WOS:A1996VF43200002
关键词[WOS]	METALS
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/311007/39110
专题	力学所知识产出(1956-2008)
通讯作者	Duan, ZP (reprint author), CHINESE ACAD SCI,LNM,INST MECH,BEIJING 100080,PEOPLES R CHINA.
推荐引用方式 GB/T 7714	Duan ZP,Wang WB,Zheng QR,et al. A new dynamic model for study of dislocation pattern formation[J]. Acta Mechanica Sinica,1996,12,3,:200-212.
APA	段祝平,王文标,Zheng QR,黄国君,Chen DW,&Duan, ZP .(1996).A new dynamic model for study of dislocation pattern formation.Acta Mechanica Sinica,12(3),200-212.
MLA	段祝平,et al."A new dynamic model for study of dislocation pattern formation".Acta Mechanica Sinica 12.3(1996):200-212.

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