Crack in neck of hollow shaft is a very serious malfunction, main cause of the crack include: foundry defect, centralized stress, quality problems of welding and heat treatment.
中空轴轴颈裂纹是水泥磨的严重故障。中空轴轴颈裂纹产生的原因主要有：铸造缺陷，应力集中，焊接和热处理质量问题等。
But this method is used to determine welding residual stresses in many cases where the stress peaks are often near the material's yield strength.
但是在许多情况下，钻孔法是用于测量焊接残余应力，而该应力峰值往往接近材料的屈服极限。
Controlling on grid welding deformation and welding stress are the key problems for assuring grid quality.
控制网架的焊接变形与焊接应力是保证网架质量的关键之一。
A set of experimental optical lines is designed to calculate welding residual stress.
设计了一套全息干涉的试验光路，以计算焊接残余应力。
On the basis of model selection from the pieces tested and according to elastic mechanics, the relation between minute displacement and welding residual stress is deduced.
对所测试件选取适当的模型，应用弹性力学理论，推导出微小位移与焊接残余应力的关系式。
Evolvement process of longitudinal stress and residual stress field after welding are obtained.
得到了焊接过程中纵向应力的演变规律与焊后应力场的分布情况。
To remove internal stress such as those produced by drawing, bending, or welding.
去除内应力，如用冲压、完全或焊接成型的工件。
Evolvement of longitudinal stress and residual stress field after welding are obtained.
得到了焊接过程中纵向应力的演变规律与焊后应力场的分布情况。
The notch welding stress and the collapse-deformation of steel container directly affects the welding quality and service life of the container.
钢制容器人孔的焊接应力及塌陷变形，直接影响容器的焊接质量和使用寿命。
With the welding spot fatigue lifetime pre-estimation method, by combination of the finite element analysis and stress calculation, the welding spot fatigue damage under actual load can be calculated.
采用焊点疲劳寿命预估方法，通过有限元分析并结合应力计算，即可计算出实际载荷工况下的焊点疲劳损伤。
The paper discusses over the influence exerted by welding residual stress on the static strength, brittle fracture and stress-corrosion cracking of metal structure.
本文介绍了焊接残余应力对金属结构的静强度、脆性断裂以及应力腐蚀开裂的影响。
The prediction and controlling of welding distortion and residual stress is still a very important project in the industry.
焊接变形和残余应力的预测和控制至今仍然是工业生产中需要解决的重要课题。
It can be predicted that the cylindrical shell structure is better than the plane structure in reducing welding residual stress through local loading.
因此可以预见，对于应用局部加载降低结构体焊接残余应力，柱壳结构要比平板结构效果更好。
There is significant closure in welded specimen 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。
Temperature field distribution of weldment, which reflects complex welding heat process, is a basic on studying welding deformation, residual stress and so on.
焊件中的温度场分布反映了复杂的焊接热过程，是研究焊接变形、焊后残余应力等状况的基础。
As for material's performance under the effect of dynamic loading, it plays an important role for welding residual stress in the analysis of material fatigue strength.
对于材料承受动力载荷性能的影响而言，焊接残余应力对材料疲劳寿命的影响是重要的。
Therefore, optimizing welding parameters was a valid means to minish and control welding residual stress and distortion.
因此，优化焊接工艺参数是减小、控制焊接残余变形和残余应力一种有效手段。
Experiment results of welding residual stress and the stress after local post weld heat treatment are compared with numerical simulation.
给出了焊接残余应力与局部焊后热处理应力的试验结果与模拟结果的对比。
The carbon content being high, this kind of welding rod is not fit for welding machine parts that have to withstand high stress.
由于含碳量高，所以这种焊条不宜焊接必须承受高应力的机器部件。
Effects of relieving residual welding stress with different heat treatment methods were studied by the method of drilling little holes.
采用小孔法测定了不同热处理方法消除焊接残余应力的效果。
The macro and micro analysis of fracture indicates that it produces fracture because it doesn′t avoid welding stress in time.
根据断口的宏、微观形貌，认为油管焊接后未及时消除焊接应力，产生了淬硬裂纹；
The whole process of the relief of the welding residual stress through an explosive treatment is simulated by using the nonlinear dynamic finite element method.
利用非线性动力有限元法对爆炸处理消除焊接接头残余应力的全过程进行了数值模拟。
The paper introduces the test of welding residual stress in weldment of constructional machinery and its distribution law.
通过测试工程机械结构件焊接残余应力，分析其分布特点；
Utilizing the transformation of bead metal can reduce tensile stress directly in the course of welding, even produces compressive stress, to improve the service life of welding structure effectively.
利用焊缝金属组织转变的方法可以在焊接过程中直接降低焊接残余拉伸应力，甚至产生残余压缩应力，有效地提高焊接结构的使用寿命。
For welding the extra thick plate of low alloy high strength steel, due to the influence of welding stress, it relatively difficulty for controlling the defect and deformation.
低合金高强钢特厚板的焊接，由于焊接应力的影响，在控制缺陷和变形方面都比较困难。
Die stress analysis results show that the deformation of the die core increases with welding chamber height. For the stress distribution, there exists a best welding chamber height.
模具变形分析结果表明，随着焊合室深度增加，模芯变形程度增大，对应力分布来说，存在一个最佳的焊合室深度。
Compared the welding residual stress with testing data, the both accord each other, and high temperature temper reduce the peak value of welding residual stress effectively.
将计算得到的残余应力分布与实测的残余应力数据进行比较，两者符合较好，而且高温回火有效的降低了焊接残余应力的峰值。
In this paper, the problems on compressive plastic deformation in the weld and the principle of welding stress and strain described by d.
讨论了焊缝是否存在压缩塑性变形问题和拉达伊d应力应变原理图存在的问题。
In this paper, the problems on compressive plastic deformation in the weld and the principle of welding stress and strain described by d.
讨论了焊缝是否存在压缩塑性变形问题和拉达伊d应力应变原理图存在的问题。
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