There is significant closure in weldedspecimen due to the effect of welding residual stress.
在焊接试件中有显著的裂纹闭合现象，其原因是焊接残余应力的作用。
2
The fatigue performances of weldedspecimen of tubular joints are tested at low temperature and normal temperature.
通过管节点模型试样的低温和常温疲劳试验，得出了低温环境对试样疲劳s - N曲线的影响系数。
3
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 weldedspecimen.