1) threshold stress of crack propagation
疲劳门槛应力
2) fatigue threshold
疲劳门槛
1.
The effect of Mode Ⅲ overload with different parameters on Mode Ⅰ fatigue threshold was investigated for Ouenching-Tempering 40Cr steel in the near-threshold region.
研究了不同参数的Ⅲ型过载对近门槛区调质 40Cr钢Ⅰ型疲劳门槛的影响。
2.
The effect of single overload on ModeⅠfatigue threshold was studied for 40Cr steel with different treating conditions in the near threshold region.
研究了近门槛区单周过载对 40Cr钢热处理组织Ⅰ型疲劳门槛的影响。
3.
It was in-dicated that whether fatigue threshold as a design param-eter depended mainly on fatigue design philosophy, fa-tigue load spectrum and non--destructive inspection tech-nique.
介绍了疲劳设计准则的基本类型,说明了疲劳门槛的意义及其在疲劳设计中的作用,指出疲劳设计准则、疲劳载荷谱及无损检测技术是决定疲劳门槛能否作为疲劳设计参数的三个主要因素。
3) fatigue threshold
疲劳门槛值
1.
The fatigue threshold ofⅠ,Ⅰ+Ⅱ,Ⅰ-Ⅲmixed-mode cracks in 35CrMo steel quenched at 860℃,then tempered at 200,300,400,550,650℃respectively was studied.
研究了35CrMo钢试样在860℃淬火+不同温度回火态的复合型裂纹疲劳门槛值。
2.
According to the analysis of some theoretical models for predicting fatigue threshold of a cracked body, it is held that the tensile properties of structural steels and the stress ratio under recycle loading are main dominant factors of the fatigue threshold.
通过对各种疲劳门槛值的理论模型的分析 ,认为结构钢的拉伸性能指标和循环加载条件是裂纹体疲劳门槛值的决定因素 。
3.
The As-cast ferrite ductile iron specimens with the same chemical composition but the differ-ent graphite nodule sizes and numbers are obtained,through controlling reasonably inoculation condi-tion and cooling rate,The fatigue threshold △K_(th) and the metallographic structure near the crack are de-tected.
通过合理地控制孕育条件和冷却速度，获得了化学成分基本相同，而石墨大小、数量互异的铸态铁素体球铁试样，测定了它们的疲劳门槛值△Ｋ＿（ｔｈ）。
4) fatigue threshold value
疲劳门槛值
1.
001) and fatigue threshold value △Ktn.
本文通过对此３种材料施以不同预变形，研究了Ｃｏｔｔｒｅｌｌ气团对初始屈服抗力σ_０和疲劳门槛值△Ｋ_（ｔｈ）的影响。
5) fatigue crack threshold
疲劳裂纹门槛值
6) fatigue initiation threshold
疲劳启裂门槛值
1.
In this paper,the experimental results of fatigue initiation threshold at sharp notch are reported for two groups of Q 235 steel under plane stress and plane strain conditions.
文章报告了两组 Q2 3 5钢小缺口试件在平面应力与平面应变条件下的疲劳启裂门槛值的测定结果。
补充资料：极限疲劳应力
分子式：
CAS号：
性质：当疲劳寿命曲线变得与lgN轴基本平行时相应的周期性应力振幅(N表示周期次数)。由于疲劳试验无法长时间无限制地进行下去，一般当周期次数N达到107时，材料仍未发生破坏，此时对应的周期性应力振幅上限值称极限疲劳应力，又称条件极限疲劳应力。
CAS号：
性质：当疲劳寿命曲线变得与lgN轴基本平行时相应的周期性应力振幅(N表示周期次数)。由于疲劳试验无法长时间无限制地进行下去，一般当周期次数N达到107时，材料仍未发生破坏，此时对应的周期性应力振幅上限值称极限疲劳应力，又称条件极限疲劳应力。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条