材料中的杂质影响疲劳寿命。
该方法也可用于材料的疲劳寿命预测。
Crey forecast method can be used to forecast the fatigue life of materials, too.
比较了不同初始裂纹尺寸对疲劳寿命的影响。
Effect of different initial crack sizes on fatigue life was compared.
桥梁伸缩装置疲劳寿命要受到各种因素的影响。
The fatigue life of the bridge expansion device are influenced by many factors.
疲劳寿命估算。
所得结果可以为预测复合材料结构的声疲劳寿命提供参考。
The results can provide references for forecasting acoustic fatigue life of composite structures.
最后还给出了相应的表层组织结构分析和疲劳寿命试验结果。
At last, the corresponding analysis of surface structure and testing of fatigue life were given.
腐蚀会降低材料的疲劳寿命而超载则对疲劳寿命有增益作用。
Corrosion results in decrease of metal fatigue life and overload can result in prolonging of fatigue life.
介绍了一种预测受多轴交变载荷工程构件的低周疲劳寿命的方法。
A method is outlined for making low cycle fatigue life prediction for engineering components subject to multiaxial loading.
因此，考虑热老化对材料性能的影响可能得到更准确的疲劳寿命预报。
So considering thermal aging effect to rubber may give an accurately result to predict the fatigue life.
最近，本文第二作者提出了一种海洋结构物疲劳寿命预报的统一方法。
There have been some fatigue life prediction methods in the recent decades, but most of them cannot explain some known fatigue phenomena.
此外，凸耳孔壁表面的加工缺陷也是降低凸耳疲劳寿命的一个重要因素。
In addition, another important factor of decreasing lives of lugs is machining defects in hole wall surfaces of lugs.
给出高强钢焊趾表面裂纹在压弯组合应力下应力强度因子及其疲劳寿命计算式。
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses have been presented.
该方法所需机时较少，可用于工程实际构件的疲劳寿命预估及抗疲劳优化设计。
This method requires not much of CPU time and can be applied to engineering practice in estimating lives and designing against fatigue.
给出了高强钢焊趾表面裂纹在压弯组合应力下应力强度因子及其疲劳寿命计算式。
The formulae for calculating SIF and fatigue life of surface crack at weld toe of the high-strength steel under the combination stresses were given out.
利用自制的球-棒疲劳试验机，研究了纳米金刚石粉对钢球接触疲劳寿命的影响。
Effects of nano diamond particles on contact fatigue life of steel ball were evaluated on a self-made ball-rod contact fatigue tester.
一个如图83所示的平均应变或预应变，在某种情况下，能够缩短以后的疲劳寿命。
A mean strain or prestrain, as in FIG. 83, can under certain conditions reduce the subsequent fatigue life.
多年来，波音公司可能已经积累了比任何其他飞机制造商更多的有关飞机机体疲劳寿命的数据。
Over the years, Boeing has probably accumulated more data on the fatigue life of airframes than any other plane-maker.
疲劳强度分析、疲劳寿命预报和疲劳行为的评估具有重要的工程背景和理论研究价值。
Fatigue strength analyses, prediction of fatigue life and assessment about fatigue behaviors have important engineering background and particular theoretic value.
对含中央疲劳损伤裂纹钢板粘贴CFRP加固，改善其剩余疲劳寿命进行了理论分析。
It is conducted a theoretical analysis of improving the residual fatigue life of a steel plate with central fatigue damage cracks, which is strengthened by CFRP.
根据疲劳寿命预测理论，建立了某机车车轮受力危险点在不同路况下的疲劳寿命曲线。
Based on fatigue life prediction theory, fatigue life curve of dangerous points of wheels under force of a certain locomotive was established.
通过非线性有限元分析，计算出焊点疲劳寿命对下部填充料基本热力学性质的依赖关系。
Through non-linear finite analysis , the dependence of fatigue life of solder joint on thermomechanical properties of underfill was calculated.
疲劳寿命的计算采用断裂力学方法，建立疲劳裂纹扩展模型和失效模式的极限状态方程。
Fatigue damage estimation of the tendons was made using fracture mechanics approach, establishing the fracture crack growth rate model and limit state equations for failure modes.
这一循环参数分析和疲劳寿命估算方法为典型机翼下壁板结构的疲劳寿命估算建立了基础。
Through the cyclic parameter analysis and the method of fatigue life estimation, a basis for fatigue life estimation of typical lower-wing structure is established.
累积塑性应变能随着加载频率及应力水平的增加而增加，与疲劳寿命在半对数坐标下呈线性关系。
The cumulative plastic strain energy increases with the increase of the loading frequency and stress level, which is linear with fatigue life on semilog coordinate.
本文提出了一种新的钢轨疲劳寿命的可靠度估算方法，使可靠性分析第一次进入钢轨的寿命估算。
This paper proposes a new estimating method which, for the first time. introduces reliability analysis into the life estimation of railway rails.
本文提出了一种新的钢轨疲劳寿命的可靠度估算方法，使可靠性分析第一次进入钢轨的寿命估算。
This paper proposes a new estimating method which, for the first time. introduces reliability analysis into the life estimation of railway rails.
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