查询词典 fatigue

In the meantime, a new relation between the coefficient of variation for a normal variate and its sample size is achieved, where the probability to make mistake Ⅱ is considered 5 The probability distribution of fatigue strength at given life under large sample size determined by a new method is found to follow the log-normal distribution and normal distribution, and a new method are developed to estimate the characteristic parameters of probability distribution of fatigue strength from the probability distribution of traditional tensile properties.

根据P-S-N曲线的要求，采用概率统计方法，导出了考虑犯Ⅱ类错误的概率时获取给定精度P-S-N曲线所需的最少子样容量，引入了不同方法获取的P-S-N曲线结果是否趋同的判别标准，得到了P-S-N曲线的寿命求解法和系数求解法获得趋同结果的条件。 5）研究了大子样条件下指定寿命时疲劳强度的概率分布，并提出了根据拉伸性能的分布估算材料疲劳强度概率分布参数的一种方法。

This paper summarizes the research on fatigue of steel bridges and orthotropic steel bridge decks in the world, which give an important reference to the fatigue research and design of steel bridges in our country.

本文对国外钢桥及正交异性钢桥面板的疲劳研究作了详细的综述，这对于我国钢桥疲劳研究和设计具有重要的参考和借鉴作用。

To the question of fatigue invalidating of strain gages in dynamic test(normally the zero drift value being bigger than the permissible value),the equations for calculating the fatigue life of the strain gages are derived on the basis of the fracture mechanics theory.

针对应变片在长时间的动态测试中疲劳失效(一般是测量误差超过允许值)问题，本文从疲劳断裂力学的基本理论出发，导出了应变片疲劳寿命的计算公式；实验表明，实验曲线与理论曲线吻合，这证明我们推导的公式的正确性，为应变片的疲劳寿命的预测、许可载荷的确定、失效判据的确立提供了理论基础。

The results indicate that, the inte r face of laminated composites plays a significant role in fatigue crack growth. T he fatigue crack propagation is arrested by the interface delamination in the ex plosive bonded LY12 laminate.

结果表明，层合板中的层间界面性能对其疲劳性能具有重要影响，在LY1 2 爆炸复合板中，垂直板面L-S取向和L-T取向的疲劳裂纹在扩展过程中都发生了明显的止裂。

The calculating formula for fatigue reliability of single component was deduced. A criterion of fatigue failure of integral platform and the method for determining key failure mode of platform were suggested,and the computing method for failure probability of integral platform was presented.

在此基础上给出了单个构件的疲劳可靠性计算公式，提出了平台整体疲劳失效的简化判断依据和平台关键失效模式的确定方法，并给出了平台整体失效概率的计算方法。

The results show that the fracture mode of blade is vibration fatigue and the main cause of initiation of fatigue crack is the mismatch between rabbet and tongue-and-groove.

结果表明，叶片的断裂模式为振动疲劳，叶片榫头与榫槽配合不当是萌生疲劳裂纹的主要原因。

It is successful to obtain the S-N curve by linear regression from the relative coefficient of low temperature fatigue experimental data. Different safety fatigue life can be estimated according to different safety probability.

从低温疲劳实验的相关系数可以看出，用线性拟合来回归中值S-N曲线是成功的，而且根据不同的安全概率，可以计算出不同的安全疲劳寿命。

The uncertain parameters of cylindrical spiral spring fatigue strengthen analysis are analyzed and described as interval variables, and an interval analysis model is established, and the non-probabilistic reliability index of cylindrical spiral spring fatigue strengthen is presented.

分析圆柱螺旋弹簧疲劳强度分析中的不确定性，将圆柱螺旋弹簧设计中不确定参数描述为区间变量，建立圆柱螺旋弹簧疲劳强度非概率可靠性分析的区间模型，提出圆柱螺旋弹簧疲劳强度非概率可靠性的指标。

After shape memory treatment at 673～773K,the transformation type of this alloy was .The Ti-Ni SMA spiral spring had longer fatigue limit when heat treatment at 773K.The fatigue ...

结果表明，在 673～ 773K热处理状态下，该合金的相变类型为，经 773K热处理后，弹簧有较高的疲劳寿命；用冷加工率较小的Ti Ni丝绕制的弹簧疲劳寿命较高；喷丸处理可有效提高该弹簧的疲劳寿命。

ST5BZThe effect of the temperature of shape memory treatment,cold working rate and shot-peening process on the fatigue limit of Ti-50.2Ni shape memory alloy spiral spring had been studied by differential scanning calorimetry and thermal cycling fatigue test.

利用示差扫描热分析仪和热循环疲劳试验，研究了形状记忆处理温度、冷加工率和喷丸工艺对Ti 50 2Ni形状记忆合金弹簧疲劳寿命的影响。

Hanna: That's over now, isn't it?

都结束了，对吗

You must be ill. You look so pale.

你一定是病了，你的脸色苍白。