tyuuiii 发表于 2010-4-27 12:03

关于位错和滑移

关于位错和滑移有没有人愿意就以下问题给出解释:

1滑移和位错是等价的概念吗?还是有包含关系?
2它们应该如何量化,是不是可以用类似应变和应力的量来描述它们?
3滑移面是发生在一个平面上的吗?有没有三维的滑移情况呢,又该怎么量化?
4向错(disclination)又是一个什么概念

nonlinear 发表于 2010-4-28 22:42

1、这是两个不同的概念,滑移是面缺陷,位错是线缺陷
2、位错有位错密度
3、滑移面是发生在一个平面上。是二维的
4. 摘自wiki:A disclination is a line defect in which rotational symmetry is violated. In analogy with dislocations in crystals, the term, disinclination, for liquid crystals first used by F. C. Frank and since then has been modified to its current usage, disclination. It is a defect in the orientation of director whereas a dislocation is a defect in positional order
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