The computation expression for the strain neutral layer of stress and plastic bending was introduced and so the thinning coefficient computing formula of sheet metal was deduced.
给出了板料弯曲的应力应变中性层和纯弯曲应变中性层的计算公式，并推出板料弯曲时的变薄系数计算公式。
2
Under normal physiologic condition, the stress in posterior extension is greater than that in anterior flexion, but less than in neutral position.
正常生理状态下斜扳，后伸位应力大于前屈位而小于自然中立位。
3
In the elastic region of the cross-section, the stress distribution varies linearly from the neutral axis to the beginning of the yielded area.