Misfit dislocation dipoles in wire composite solids

X. Wang, E. Pan*, P. W. Chung

*此作品的通信作者

研究成果: Article同行評審

24 引文 斯高帕斯(Scopus)

摘要

Developed in this note is a theoretical model describing the mobility of a misfit screw dislocation dipole in a wire composite consisting of a stiff cylindrical substrate covered by a soft co-axial cylindrical film. A critical value of the film thickness, which is a function of the parameter measuring the stiffness of the film with respect to the substrate, is identified. It is observed that: (i) there exist two equilibrium positions of the misfit dislocation dipole (one stable and the other one unstable) when the film is thicker than the critical value; (ii) the two equilibrium positions of the misfit dislocation dipole converge to a single saddle point equilibrium position which is neither stable nor unstable when the thickness of the film is at the critical value; (iii) there exists no equilibrium position of the misfit dislocation dipole when the thickness of the film is below the critical value. These features could be useful to the design of wire composites and to the dislocation-related plasticity analysis.

原文English
頁(從 - 到)1415-1420
頁數6
期刊International Journal of Plasticity
26
發行號9
DOIs
出版狀態Published - 9月 2010

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