neutral axis

基本解释

First, by placing the concrete slab above the neutral axis of the steel, our COS Decks maximize the strengths of both steel and concrete.
首先，通过把混凝土板置于钢筋中轴之上，我们的这款桥面最大限度地加大了钢铁和混凝土的强度。
www.e-gtm.com.cn
In the elastic region of the cross-section, the stress distribution varies linearly from the neutral axis to the beginning of the yielded area.
在界面的弹性变形区域的应力分布呈直线型，这种线性分布从截面中性轴开始到其屈服区域结束。
Elementary Elastic Bending theory requires that bending stress varies linearly with distance from the neutral axis, but plastic bending shows a more accurate and complex stress distribution.
基本弹性弯曲理论要求弯曲应力均随到中性轴的距离而线性变化，但塑性弯曲理论揭示了一个更加精确的和复杂的应力分布。

Even neutral countries, however, participated quietly on one side or the other, Spain and Switzerland closer to the Axis Powers, and the others helping the Allies.
FORBES: Meditation On A Shrinking Planet

the line or plane through the section of a beam or plate which does not suffer extension or compression when the beam or plate bends