机械零件在随机载荷作用下产生疲劳失效。
The machine parts occurred fatigue failures under the actions of random loads.
多数汽门簧的失效是正应力引起的疲劳失效。
The failure of most valve springs is due to the applied positive stress resulting in the fatigue fracture.
在钻具失效事故中，钻铤的疲劳失效尤为突出。
In the event failures of boring tools, the fatigue failure of the drill collar is especially prominent.
结果表明，该中间拉杆的破断属腐蚀疲劳失效。
The results showed that the intermediate tie rod was fractured by corrosion fatigue.
研究表明，表面缺陷是螺旋弹簧疲劳失效的主要原因。
Research indicate that the surface defect is main reason for fatigue losing efficacy of coil spring.
一种疲劳失效类型，循环应力是由于交变热应力引起的。
Thermal fatigue. A type of fatigue failure wherein the cyclic stresses are introduced by fluctuating thermal stresses.
针对电动车后避震的疲劳失效损坏，提出疲劳损坏概率估计。
Aimed at the fatigue failure of electric bike shock absorber, a probabilistic estimation method is put forward.
指出了疲劳失效分类以及疲劳裂纹的产生、扩展和断裂机理。
It points out that the classification of fatigue failure and the mechanism of fatigue cracks, expansion and fracture.
由于扭杆受到的是循环应力，因此设计时考虑了疲劳失效问题；
The fatigue failure has been considered as torsion bar spring are subject to periodic forces.
接触疲劳失效系指轴承工作表面受到交变应力的作用而产生失效。
Bearing contact fatigue failure of the working surface by means of alternating the role of stress arising from failure.
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。
Low cycle multiaxial fatigue failure is the main failure mode of aeroengine compressor disk.
在本试验条件下，接触疲劳失效的主要形式为深层剥落和浅层剥落。
Under the condition of our experiments, the main forms of contact fatigue failure are deep-spalling and shallow - spalling.
经多次分析，确定主要原因是应力集中和表面质量差引起的疲劳失效。
Through analysis many times, the main reason is fatigue failure that is caused by stress concentration and surface quality.
电疲劳失效是阻碍铁电陶瓷材料应用于微驱动和微执行器件的主要原因。
The electric fatigue and failure have significantly impeded the commercial applications of ferroelectric ceramics in micro-actuator and micro-performer devices.
这对预防车轮疲劳失效、优化车轮设计，保障行车安全，具有重要意义。
It is very important to prevent fatigue failure, optimize wheel design and secure the safety of rolling stock.
但是目前对于超硬涂层材料滚动接触疲劳失效机理的研究还处于探索之中。
But the study on the rolling contact fatigue failure mechanism of super hard material coati-ngs is in grope.
认为短管失效为疲劳失效，疲劳强度低，振动载荷大是短管失效的主要原因。
The efficacy losing of short pipe is due to the fatigue of the short pipe, the main reasons are the low fatigue strength and heavy vibration load.
对在役钢结构吊车梁进行定期、不定期的检查是避免发生疲劳失效的最有效方法。
It is an effective method to carry out regularly inspection on steel crane girder structures in order to prevent from fatigue failure.
将介绍疲劳强度及失效机制。并提出一个对于机械及生物机械元件疲劳失效的研究。
Fatigue strength and failure mechanisms are presented. A survey of mechanical and biomechanical component fatigue failures is given.
这种容器的最大优点是在绕制过程中获得高预压缩应力，显著减少疲劳失效的危险性。
A tremendous advantage of these vessels is that high compressive stresses are induced during winding. This Prestressing greatly reduces the risk of fatigue failure.
特别是在深井作业中及硬地层，容易发生失效事故，其中疲劳失效是主要的失效形式。
Failure accident are liable to occur in the deep well and hard formation. Fatigue faliure is the main faliure form.
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 synthesis of thermal, centrifugal and aerodynamic stresses may cause the low cycle fatigue failure of the blades.
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.
疲劳失效是钛合金工业应用中最重要的失效方式，疲劳强度是钛合金应用的关键性指标。
Fatigue failure is the most important failure mode in industrial applications of titanium alloys while fatigue strength is the critical mechanical property.
本文建立随机疲劳失效的多维概率模型。论述推导机械零件疲劳失效分布的随机模拟公式。
In this paper, multidimensional probability model of random fatigue failure was established and the random simulating formula of failure distribution function was deduced.
焊点所承受的各种环境应力和工作应力的时间历程（时间应力）是其疲劳失效的直接外因。
The main external factor of solder joints degradation or deviation from an expected normal condition is the time stress such as work and environment stresses.
焊点所承受的各种环境应力和工作应力的时间历程（时间应力）是其疲劳失效的直接外因。
The main external factor of solder joints degradation or deviation from an expected normal condition is the time stress such as work and environment stresses.
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