某舰的螺旋桨尾轴长期处在恒定载荷作用下，虽然尾轴应力在弹性极限范围内，但是尾轴局部还是很容易发生微量的塑性变形。
Tiny deformation will appear in the local of the propeller shaft of certain ship which is endured an invariableness load, although the shaft stress is within the elastic limit range.
钻孔法测量残余应力的范围是应力不超过材料屈服极限的一半。
The scope of the residual stresses determined by the hole drilling method should not exceed one half of the material's yield strength.
线弹性及非线性分析结果表明，最不利工况下，部分节点局部区域的峰值应力有超过铸钢屈服极限的情况，但屈服区域范围小，同时最大应变值尚小。
Though the peak value of the stress in part areas exceeds the yield limit of the cast steel, as the yielding areas are small an.
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