The persistent slip bands were determined by the observations of the substructure near the surface of gear steels on fatigue load.
通过对在疲劳载荷作用下渗碳齿轮钢次表层亚结构的观察发现有持续滑移带形成。
According to fatigue damage accumulation theory, test load of verified fatigue test on rail across beam and welded connections with integral joint of combined steel truss bridge was gotten.
依据疲劳损伤累积理论，确定了公轨两用钢桁桥轨道横梁与整体节点连接头验证性疲劳试验的试验荷载。
The prediction of fatigue life is important for steel towers and so on, because for this type of structure wind load is regarded as the main load.
由于风荷载是钢塔架等钢结构的主要荷载，风荷载作用下上述结构的疲劳寿命预估因而是至关重要的。
Based on the many times tests and analyses, a real time system about spot testing fatigue load spectrum of engineering structure materials was studied and developed.
在多次试验和分析的基础上，研制了一种可用于现场测试的工程结构材料疲劳载荷谱实时测定系统。
A modifying coefficient of load frequency is used to describe the effect of load frequency on fatigue behavior in ultrasonic fatigue testing.
采用一个超声加载频率修正系数对超声疲劳性能试验中载荷频率对疲劳性能的影响进行修正。
The brake rims on drilling rig drawworks are subjected to heat load during string lowering and will end in thermal fatigue failure.
石油钻机绞车刹车鼓在下钻过程中，由于热负荷的作用会发生热疲劳破坏。
Results When continual stress got together to act on tibia bone which exceed its physiological load tibia bone will fatigue, then fatigued fracture will take place.
结果持续高强度应力积累作用于胫骨超过生理载荷能力时，即会出现胫骨疲劳，继而发生胫骨疲劳骨折。
The skid bank fatigue life test of automobile transmission assembly has a long periodic time, which should go on under certain temperature and load.
变速器总成台架疲劳寿命试验周期长，并且要求其在一定温度、载荷下进行。
It is very difficult to predict the fatigue life of the creeper tread because both testing load history and fixing on load locations are not easy to realize.
由于履带板的载荷历程难以测试和载荷作用部位难以确定，疲劳寿命预测很难进行。
An anisotropic damage model for concrete subjected to compressive fatigue load is developed based on continuum damage mechanics and the concept of boundary surface.
基于边界面概念和损伤力学理论，建立了混凝土受压各向异性损伤模型。
The study shows that it is feasible to apply ECCS Recommendation Method to the evaluation and estimation of the fatigue strength of the load carrying parts on welded bogies.
研究表明，ECCS规范方法用于车辆焊接转向架承载构件的疲劳强度评估是可行的。
Conclusion: the Hongxue tea mixture has an obvious effect on the strengthening the adaptability of muscular exercises load and resisting fatigue growth and accelerating fatigue elimination.
结论：红雪茶混合物对增强机体运动负荷的适应能力，抵抗疲劳产生和加速消除疲劳等方面具有明显作用。
The accuracy of fatigue test results depends on the authenticity of the load spectrum.
疲劳试验结果的准确性取决于载荷谱的真实性。
Therefore, we should do research on the time-dependent reliability of cable-suspended pipelines (CSP) under the wind load with comprehensive consideration of strength and fatigue.
因此，综合考虑强度和疲劳问题，研究悬索跨越管道结构在风荷载作用下的时变可靠性对结构的正常使用具有重要意义。
The thought of this paper is to discuss on and analysis to dynamic response of HSMS under impact load, and estimate its mean life based on noted stress fatigue design method.
本文的主导思想是讨沦和分析冲击载荷下螺旋弹簧质量系统的动态响应，并应用名义应力疲劳设计方法估计其平均寿命。
Recent studies on the damage and deterioration of concrete experiencing fatigue load and environmental effects are summarized.
概述了目前关于混凝土在疲劳荷载与环境因素耦合作用下的损伤劣化规律的研究。
High temperature fatigue creep test of 316l stainless steel under 1-step and 2-step load was conducted, the influence of the load history on material behavior was investigated emphatically.
进行316L不锈钢在单级和两级载荷作用下的高温疲劳蠕变试验，研究了载荷历程效应对材料行为的影响。
Found non-linear fatigue damage equation and fatigue failure criterion of concrete under variable amplitude load, and analyze the influence of loading sequence on total fatigue life;
建立了混凝土非线性疲劳损伤方程和变幅荷载下的疲劳破坏准则，分析了加载次序效应对总疲劳寿命的影响；
In chapter 2, the fatigue mechanism of automobile half shaft is studied; and intensified coefficient model based on fatigue failure theory and programmed load spectrum technology is also provided.
第二章研究汽车驱动桥半轴疲劳破坏机理，在零件疲劳损伤理论和程序载荷谱处理技术基础之上给出路面强化系数模型。
Corrosion fatigue damage of concrete is the coupling action result of corrosion medium and load fatigue, and the study on this has been in the stage of theory search.
混凝土腐蚀疲劳破坏是腐蚀介质与交变荷载耦合作用的结果，对其研究目前国内外还仅处于理论探索阶段。
Objective: To study the effects of incremental load training on exercise capacity by establishing exercise fatigue model.
目的：通过建立运动性疲劳的人体实验模型，动态观察递增负荷运动对机体运动能力的影响。
The amplitude and maximum of cyclic load are the most important effect factors on fatigue lifespan of rock.
影响岩石疲劳寿命的主要因素是周期荷载的上限应力和幅值。
Material characteristics, geometrical property of a structural components and the load acted on it are random variables. As a result, its natural frequency and fatigue strength are random ones.
由于构件的材料参数、几何参数及所受的载荷均为随机变量，所以构件振动时其固有频率及疲劳极限亦为随机变量。
The first frequency method of estimating the fatigue serviceability on small and medium span railway concrete bridge is discussed in this paper through three piece test beam under fatigue load.
通过三片模拟梁试验实测结果，探讨了基频法评估铁路桥梁疲劳使用性能的可行性。
Load spectra are important basis on which the classification of cranes, the experimental study of fatigue limit of the crane framework, and the evaluation of its life limit are based.
载荷谱是起重机分级、结构疲劳强度试验研究和寿命估算的重要依据。
And the brush of high temperature gas and impact load speeded failure. The cracks on valve sur-face are primarily emerged due to inter crystalline chap, then fatigue pr...
高温燃气冲刷及冲击负荷的作用，加速了该气门的失效，其过程是由沿晶界龟裂，然后以此为裂源而引起的疲劳扩展。
Finally the threshold value of load amplitude that influences fatigue life of wheelset is calculated based on the principle of equivalent damage and damage distribution agreement.
依据损伤等效和损伤分布一致原则，计算得出了影响轮对疲劳寿命的载荷幅值门槛值。
Finally the threshold value of load amplitude that influences fatigue life of wheelset is calculated based on the principle of equivalent damage and damage distribution agreement.
依据损伤等效和损伤分布一致原则，计算得出了影响轮对疲劳寿命的载荷幅值门槛值。
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