yiqing 发表于 2010-5-21 10:45

几何中心与中和轴

请问一下,几何中心与中性(和)轴的区别是什么,谢谢?

nonlinear 发表于 2010-5-22 09:11

wiki上的解释不错:
The neutral axis is an axis in the cross section of a beam or shaft along which there are no longitudinal stresses or strains. If the section is symmetric and is not curved before a bend occurs, then the neutral axis is at the geometric centroid. All fibers on one side of the neutral axis are in a state of tension, while those on the opposite side are in compression

shiyu0814 发表于 2010-5-23 08:38

回复 楼主 yiqing 的帖子

中和轴是受弯构件截面应力分布中,压应力和拉应力的分界线,并且它和弯曲主轴平行,对于钢材而言,中和轴两侧截面面积是相等的。

zsq-w 发表于 2010-5-23 20:33

几何中心仅仅从几何的角度来计算中心,是一个点
中心轴还得考虑进材性,是一条线
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