The yield point represents the dividing line or transition from the elastic to the plastic region of the curve. 屈服点是弹性变形区域到塑性变形区域之间曲线的过渡点。
In order to ensure that the structure is stable, the working stresses are kept well below the yield point or the proof stress. 为了保证结构稳定，工作应力应很好地保持在屈服点或弹性极限以下。
