根据一系列常幅疲劳试验，分析了抗弯加固rc梁中FRP疲劳应变的变化规律和关键影响因素。
Based on a series of fatigue tests, the change laws and the main influence factors of FRP strain of strengthened RC beams under cyclic bending loads were analyzed.
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.
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.
结果表明，含氮量对滚动接触疲劳寿命及平面应变断裂韧性具有很显著的影响，而对耐磨性影响很小。
The results show that nitrogen has remarkable influences on rolling contact fatigue life and plain strain fracture toughness, and little influences on wear resistance.
沥青混合料疲劳试验的荷载控制模式有应力控制模式和应变控制模式。
There are two kinds of load controlling mode for asphalt mixtures fatigue testing:stress controlling mode and strain controlling mode.
沥青混合料疲劳试验的荷载控制模式有应力控制和应变控制两种。
There are two kinds of load controlling mode for asphalt mixture fatigue testing-stress controlling mode and strain controlling mode.
对调质处理的45碳索结构钢进行了应变循环低周疲劳实验以及应力控制棘轮失效实验。
The cyclic strain low cycle fatigue and cyclic stress ratcheting failure of 45 carbon steel treated by quenching and tempering were experimentally investigated.
还列表给出车轮钢的全部应变疲劳参数和与之对应的静态参数，可供设计选材，寿命估算时使用。
Moreover, this paper lists both static and strain fatigue parameters of this material for material design, selecting and life prediction.
结果表明，在中等应变幅值之下，材料的疲劳寿命随温度的增加而降低。
At low and intermediate total strain amplitudes, the fatigue life was found to decrease with the increasing of temperature.
试验结果表明，数字图像相关方法具有可行性，能够有效地测量混凝土在疲劳荷载作用下的位移和应变。
Test results demonstrated that digital image correlation method was effective, which could precisely measure the displacement and strain distribution in concrete under fatigue loading.
本文对45号钢在静载荷下与在循环加载下的本构关系进行了探讨，并给出了低周与高周应变循环的疲劳寿命表达式。
The 45 steel natural relation of dead load with cyclic load and low frequency and high frequency strain cycling fatigue life are studied.
再列举了几种典型机车车辆用橡胶零件的有限元分析和产品试验结果对比情况，包括应力、应变、产品的疲劳性能、刚度性能等。
The FEA and test results of typical rubber components in the railway vehicle are listed, including the stress, strain, fatigue performance and stiffness etc.
在应变疲劳曲线上，弹性线和塑性线的交点随弹簧钢回火后硬度的升高而向低循环寿命移动；
The point of intersection of elastic line and plastic line moves toward the low cycle life with the hardness of the spring steel raised after tempering from the strain fatigue curve.
因此，全厚式沥青路面沥青混合料的疲劳试验更适宜采用应变控制的荷载模式。
It is shown that strain controlling mode is adequate for asphalt mixtures of asphalt stabilized base course as for fatigue test.
给出了一种快干肢的工作环境和适用温度，讨论了常规应变片疲劳波形和在测试中出现的问题。
Operational environment and applying temperature of quick - drying cement are given. Fatigue waveform of conventional strain gauge and some questions in the test are discussed in the paper.
应用随机循环应变载荷-强度干涉模型，建立了基于应变的疲劳可靠性分析新方法。
A new method for strain-based fatigue reliability analysis is constructed by considering interference between the random fatigue strain applied and capacity histories.
从钢铁结构工程应用的角度，迫切需要一种既能检测构件应力大小、分布以及构件的疲劳，而不通过测量应变而测应力，就能瞬时、定点、在线的检测方法。
Therefore a method for testing the magnitude and distribution of residual and fatigue lives of structure and member inside iron and steel components without testing their strains is urgently needed.
通过应变分布影响系数把应变疲劳与应力疲劳联系起来。
Strain fatigue and stress fatigue are related by the influence coefficient of strain distribution.
由等幅疲劳残余应变，定义了损伤变量，得到了相应的损伤积累和演化规律。
The damage variable is defined as the residual strain of concrete under constant amplitude fatigue loading, and the law of cumulative damage and its evolution are obtained.
使用有限元分析测定的关键部位格林-拉格兰奇应变评价橡胶部件的疲劳破坏参数。
The Green-Lagrange strain at the critical location determined from the finite element analysis was used for evaluating the fatigue damage parameter of the rubber components.
将建筑结构钢抗震性能作高应变低周疲劳问题处理。
The anti-seismic properties of building structural steels was treated as a problem of high strain low cycle fatigue.
因蠕变加载作用时间缩短和疲劳载荷变化更频繁，导致在较小的应变下结束普弹应变阶段并进入延迟弹性变形的平台应变阶段。
The shortness of creep loading time and the faster frequency of fatigue load change induce general elastic strain stage to end and delayed elastic strain platform stage to begin under shorter strain.
研究了铸态和挤压态az91镁合金的室温应变疲劳行为。
The fatigue behavior of as-cast and as-extruded AZ91 magnesium alloys was investigated under total strain amplitude control mode.
反应器的疲劳试验结果充分反映了反应器材料在不同应力应变水平下的疲劳寿命。
The results of fatigue test of reactor manifest the fatigue life of the reactor materials under different strain and stress condition.
本文研究了SCT试样高应变区的疲劳裂纹闭合效应和疲劳裂纹扩展速率。
The fatigue crack closure and fatigue crack growth rate in the high strain region of SCT specimen are studied.
疲劳是沥青路面设计标准之一，沥青混凝土的疲劳失效与沥青层底拉应变值的大小相关。
Fatigue is one of criterions in asphalt concrete pavement design, failure of asphalt concrete fatigue has correlation with the magnitude of tensile strain of asphalt layer bottom.
研究疲劳应力应变滞后环对探讨疲劳积累损伤很重要。
It is important to study fatigue stress - strain hysteresis Loop on cumulative fatigue damage.
预应变可以延长疲劳裂纹形成寿命，提高疲劳裂纹形成的抗力系数和裂纹形成的当量应力门槛值；
The pre-straining prolonged the fatigue crack initiation life, and increased resistance coefficient and equivalent stress threshold of the fatigue crack initiation.
引入了概率循环应变—寿命曲线描述低周疲劳循环应变—寿命试验数据的分散性。
To model the random cyclic strain life relations during low cycle fatigue, probability based cyclic strain life curves are suggested.
结果表明，扭转预应变降低低周疲劳寿命，循环应力随扭转预应变的增大而增大。
The results show that low cycle fatigue life is reduced and cyclic stress is raised by torsional prestrain raising.
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