| Summary: | 碩士 === 國立臺灣大學 === 機械工程學研究所 === 89 === The Analysis of Stress Field and Image Force due toDislocations in Anisotropic Multi-layered Medium
Hsin-Tai Lu
Abstract
Dislocations pile up in elastic materials is treated as the important cause of plastic deformation. The study of dislocation’s behavior is very important for micro-structure. By calculating the image force of dislocations, we could know the magnitude and direction of dislocation’s movement. By differentiating the position and stability of equilibrium points (zero force point), we could predict the position where the dislocations will pile up. And then we could analyze and design the materials we want.
Since the analytic method in this paper in fact is the use of image method, we have an advantage in calculating the image force of dislocations. Because of the popularly use in engineering, the study of composite materials is very important. In this paper chapter 2 and chapter 3, we analyze screw dislocations in anisotropic multi-layered medium. And because of the huge use in semi-conductor industry, the thin film material system is the other important point of our study. In this paper chapter 4 we analyze edge dislocations in anisotropic thin film material system.
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