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1)  local stress-strain method
局部应力-应变法
1.
Based on the local stress-strain methodof notched component with even property and line elastic fracture mechanics method,and bytaking into account the variabilities due to welding such as geometrical shapes, residualstresses and material properties etc.
基于均质缺口件的局部应力-应变法和线弹性断裂力学方法,通过考虑焊接过程中几何形状、残余应力和材料特性等因素的变化,建立了焊接接头低周疲劳寿命估算的一般技术流程。
2.
The life prediction methods of notched specimen are reviewed,especially on nominal stress approach,local stress-strain method and stress field intensity approach.
概述了含缺口构件疲劳寿命预测方法,重点介绍了名义应力法、局部应力-应变法和应力场强法,总结了这些方法预测含缺口构件疲劳寿命的原理、应用方法、适用范围、优缺点,并介绍了近几年来这些预测方法在国内外的研究现状和进展。
2)  Local stress strain method
局部应力-应变法
1.
Based on the local stress strain method, the fatigue life of large bellows expansion joints is predicted.
鉴于大型波纹管膨胀节全尺寸疲劳寿命试验在工程上实现的困难性,研究了基于局部应力-应变法预测大型波纹管的疲劳寿命。
3)  local stress strain method
局部应力应变法
1.
As we know, it is very hard to get an accepted accuracy in high cycle fatigue life prediction by the local stress strain method.
以往用局部应力应变法计算结构高周疲劳寿命不好的主要原因是在损伤与寿命计算中没有考虑缺口应力梯度等因素的影响。
2.
This paper introduces the method and steps of the local stress strain method to analyze the fatigue with the application of ANSYS,uses this method to analyze and calculate the fatigue-life of the press-sensor shaft both before the optimization and after the optimization to give the basis of the judgement of how the optimization influences the fatigue damage of the shaft.
详细介绍了疲劳分析中的局部应力应变法分析方法和步骤,同时结合ANSYS,运用局部应力应变法中的稳态法对优化设计前后的压力传感器轴销分别分析、计算出了疲劳寿命,为优化设计对其抗疲劳性能的影响提供了客观的判断依据;对一般零部件的疲劳寿命的计算也有一定的参考价值。
4)  local stress-strain method
局部应力应变法
1.
The blade fatigue damage during start-up is computed by means of local stress-strain method.
应用局部应力应变法估算6号机组启动过程对叶片疲劳的损伤,结果表明6号机组在启动26次左右就有可能出现裂纹,得出启动中引起的叶片中过大动应力是叶片开裂的主要原因。
2.
The fatigue life is obtained by using specimens without crack and by a special analysis based on local stress-strain method in which remembrance characteristics are considered.
采用无裂纹缺陷试件进行疲劳试验得到试件的疲劳寿命,同时利用考虑了记忆特性的局部应力应变法对试件的疲劳寿命进行定量分析。
3.
Local stress-strain method was applied to determine fatigue crack initiation life of engineering structure or components.
采用局部应力应变法预测复杂载荷下结构或构件的疲劳裂纹形成寿命 ,最关键的是疲劳缺口系数Kf 的确定。
5)  local strain-life method
局部应力应变-寿命法
6)  probabilistic local stress-strain approach
概率局部应力应变法
补充资料:动态应力-应变曲线
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性质: 在具有强迫正弦振荡的动态试验中,让黏弹性体作稳定振动,以力对变形作图,在十个周期中的轨迹为一封闭曲线,称之为动态应力-应变曲线。动态试验的结果取决于试验条件:试样形状、形变方式、应变振幅、应变历程、频率和温度。从动态应力-应变曲线可以求得黏弹性体的许多动态力学性能,如从封闭曲线面积可以求得在一个周期内材料内部的发热量。

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