而在管线钢基材中裂纹闭合现象较小，闭合原因是裂纹尖端尾部的残余塑性变形。
Crack closure of base metal is caused by the residual plastic plastic deformation remaining in the wake of an advancing crack tip and is not as significant as in welded specimen.
采用数值分析方法对冲击压痕法测量残余应力的弹塑性变形过程进行了理论分析。
The indentation method of residue stress measurement depends on strain measurement around an indention caused by an impacting sphere.
残余压应力作用在塑性变形层内。
研究了塑性变形对残余热应力的影响；
The effect of plasticity deformation on residual thermal stress was investigated.
筒形件强旋时，由于不均匀的塑性变形，在旋压件内产生残余应力。
Because of the nonuniform plastic deformation, residual stresses occur in spun parts.
结果表明，疲劳裂纹是在残余拉应力和循环压应力作用下萌生和扩展的，压塑性变形是裂纹萌生和扩展的必要条件。
The result shows: the local residual tensile stress and cyclic compressive loading thrust fatigue crack initiation and propagation in the size of compressive plastic zone.
后轮将焊缝金属的纵、横向压缩塑性变形充分碾展，减小了工件的残余变形和应力。
The rear impact roller stretches the weld longitudinally with transverse compressive plastic deformation of the weld, thus reducing the residual deformation and stresses in the bead.
产生这种误差的原因主要是由小孔边缘发生塑性变形、超出弹性范围所致。采用了一种改进方法对焊接残余应力重新测试，使误差大为减小。
The errors are mainly produced by the plastic deformation around the drilled hole, which may be reduced by the method introduced in this paper.
本文研究了宏观残余应力对微塑性变形行为与抗力的影响。
The effect of residual stress on microplastic deformation behavior and microyield strength has been investigated.
振动时效使残余应力峰值降低并得到均化的主要原因是材料内部微塑性变形的局部性。
Vibratory stress relief (VSR) can reduce the residual stress in component. The mainly cause is microcosmic plastic deformation of local region.
应用有限元分析程序对300MW汽轮机转子直轴进行了应力计算，并对各影响因素进行了分析，结果表明退火处理过程中残余应力产生的塑性变形量不可忽略。
Finite element analysis program was used to calculate the stress of 300mw turbine rotor in straightening the axle, and the effect of each factor is analyzed combined with the trial result.
应用有限元分析程序对300MW汽轮机转子直轴进行了应力计算，并对各影响因素进行了分析，结果表明退火处理过程中残余应力产生的塑性变形量不可忽略。
Finite element analysis program was used to calculate the stress of 300mw turbine rotor in straightening the axle, and the effect of each factor is analyzed combined with the trial result.
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