The results show that the fatigue damage variable of pearlite ductile cast iron as a function of fatigue cycle varies according to the index law.
结果表明：球墨铸铁的疲劳损伤变量随疲劳周数呈指数规律变化；
During the experiment, the fatigue-loading was paused after fixed fatigue cycle and the white-light speckle patterns were acquired without loading.
在疲劳加载过程中，按一定的疲劳周次在零载荷状态下停机，并采集试件表面上预先制备的白光散斑图。
Since then, the maintenance man can grasp the equipment fatigue cycle, can predict in advance the operating state of mechanical and electrical equipment to ensure normal operation of equipment.
从此，维修工可及时掌握设备的疲劳周期，能够提前预知机电设备的运转状态，保障设备正常运转。
The probability fatigue life - span of pressure vessel under the action of different cycle load is closely related to the cycle load with high stress.
承受不同循环载荷共同作用的压力容器，其概率疲劳寿命和在高应力水平上的循环载荷有着密切的关系。
Low cycle multiaxial fatigue failure is the main failure mode of aeroengine compressor disk.
低循环多轴疲劳失效是航空发动机低压压气机轮盘的主要失效形式。
The fatigue properties were researched and found that the crack propagation velocity and the decline of rigidity were related to the maximum cycle stress.
通过对其疲劳性能的实验研究，发现裂纹扩展速率的大小及刚度的下降与加载的最大循环应力密切相关的规律。
A method is outlined for making low cycle fatigue life prediction for engineering components subject to multiaxial loading.
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。
Whatever the cause, the end result can be a murky cycle of excessive fatigue, hormonal changes that lead to more snacking and.
不管原因是什么，最终的结果都会变成过度疲劳的恶性循环，激素紊乱导致饮食不规律。
Solder joint fatigue life is generally ascertained through accelerated temperature cycle test on electrical subassembly.
焊点疲劳寿命通常是通过电子组件进行温度循环加速试验来确定。
In addition, the FORTRAN calculation program of this method is compiled in this paper, by which the low cycle fatigue life of bellows expansion joints can be calculated accurately.
本文同时编写了该方法的Fortran计算程序，利用该程序可以比较准确地计算出膨胀节的低循环疲劳寿命。
The synthesis of thermal, centrifugal and aerodynamic stresses may cause the low cycle fatigue failure of the blades.
这种热应力与离心应力、气动应力合成的综合应力可能引起涡轮叶片的低循环疲劳失效。
The estimating formulae of nonsymmetry cycle fatigue limits for aluminium alloy smooth specimens are presented in this paper.
提出铝合金光试样非对称循环疲劳极限的估算公式。
High temperature low cycle fatigue (HLF) life prediction models have great significance for design of high temperature structure under cycLic loading.
高温低周疲劳(HLF)寿命预测方法对于承受变幅载荷的高温构件的设计具有重要意义。
The results show that the crack growth rate under high-low cycle complex fatigue load is greater than that under low cycle fatigue load, and so the fatigue life is obviously reduced.
结果表明：与纯低周载荷作用相比，高低周复合载荷下球墨铸铁的裂纹扩展速率明显加快，极大地降低材料的疲劳寿命。
The factor of life scatter is used for depicting the dispersibility of fatigue strength in low cycle fatigue, but in high cycle fatigue is the fatigue strength reduction factor.
低周疲劳常采用寿命分散系数描述结构疲劳强度的固有分散性，而高周疲劳采用疲劳强度减缩系数来描述。
Ultrasonic fatigue tests were carried out on Q235B base metal and welded joints by an ultrasonic fatigue test equipment in order to investigate their super high cycle fatigue properties.
用超声疲劳试验装置对Q235B母材及焊接接头试件进行超声疲劳试验，研究其在超高周疲劳寿命区间的疲劳性能。
Simple tensile tests and low-cycle fatigue tests under stress control at different temperature were conducted to investigate the effects of temperature on fatigue behavior and fatigue strength.
通过不同环境温度下的简单拉伸试验和应力控制下的低周疲劳试验，找出了环境温度对应力控制下的疲劳行为和疲劳强度的影响。
The main destruction of constructions suffering from earthquake is brought by the accumulated damage of structures under low cycle fatigue.
建筑结构在地震作用下的破坏主要是由结构的低周疲劳累积损伤引起的。
The results show that low cycle fatigue life is reduced and cyclic stress is raised by torsional prestrain raising.
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。
Low cycle fatigue (LCF) tests of a directionally solidified nickel base superalloy were conducted at elevated temperatures.
本文研究了一种定向凝固镍基高温合金的高温低周疲劳行为。
The cyclic strain low cycle fatigue and cyclic stress ratcheting failure of 45 carbon steel treated by quenching and tempering were experimentally investigated.
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。
Influence of rare earth elements on high-cycle fatigue properties of AZ91D alloy was investigated and the fatigue fracture morphology was also analyzed.
研究了稀土元素对AZ 91 D压铸镁合金高周疲劳性能的影响，并对疲劳断口的组织形貌进行了分析。
The results show that K40S alloy possesses high low cycle fatigue resistance in comparison with X-40 alloy.
结果表明：与传统X-40合金相比，K40S合金具有优异的抗高温低周疲劳性能；
The micro morphology of low carbon steel cyclic deformed with low cycle impact fatigue was investigated it was found that the cycle deformation is caused by slipping.
观察了低碳钢在低周冲击疲劳过程中循环形变的显微特征。结果表明：循环形变主要由滑移引起。
To model the random cyclic strain life relations during low cycle fatigue, probability based cyclic strain life curves are suggested.
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。
The results show that fatigue, creep and oxidation damage always develops simultaneously during low cycle fatigue at high temperature.
试样的微观断口分析显示了在高温应变疲劳试验中同时存在疲劳、蠕变和氧化损伤。
The paper also presents the low cycle fatigue life and creep life's quantificational method of steam turbine's main stop valve and control valve, and applied examples.
提出了汽轮机主汽阀和调节阀阀壳低周疲劳寿命和蠕变寿命的定量设计方法，并给出了应用实例。
Through analysis, the failure reason was confirmed as that the low cycle fatigue caused by plastic deformation occurred in the lead alloy, thus the fracture occurred.
分析其失效原因为铅合金在外力作用下，产生塑性变形引起的低周疲劳，造成断裂。
Through analysis, the failure reason was confirmed as that the low cycle fatigue caused by plastic deformation occurred in the lead alloy, thus the fracture occurred.
分析其失效原因为铅合金在外力作用下，产生塑性变形引起的低周疲劳，造成断裂。
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