Equipment life-span diagnoses mainly research the variation rules of unit part in unsteady temperature and thermal stress, fatigue characteristic of metals and life deterioration of equipments.
设备寿命诊断主要研究设备部件在非稳态下的温度及热应力变化规律、金属材料的疲劳特性以及部件的寿命损耗。
Three variables as temperature, load frequency and stress ratio are the critical parameters affecting fatigue crack growth behaviour in metallic material.
温度、载荷频率和应力比是影响材料疲劳裂纹扩展行为的主要因素。
Fatigue property of lean concrete should be studied when the material is set as base course since it withstands the repeated actions of load stress and temperature stress.
贫混凝土用于路面基层时，由于受到荷载应力和温度应力的反复作用，需研究其疲劳特性。
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。
Fracture morphology is more rough in room temperature, low fatigue stress and more fatigue cycles, but the length of fiber pullout is longer.
室温及疲劳循环应力低、循环周次多的断口粗糙度大，纤维拔出较长；
The effects of thickness, temperature and stress ratio on fatigue crack growth behavior were studied separately.
分别研究了厚度、温度、应力比等因素对直接时效GH 4169高温合金疲劳裂纹扩展性能的影响。
High temperature isothermal mechanical fatigue and in phase thermomechanical fatigue (TMF) tests in stress control were carried out on a molybdenum alloy.
对钼合金进行了应力控制高温低周等温疲劳和同相位热机械疲劳试验。
The results show that the increase of stress range value would result in decreasing the high temperature fatigue lifetime of the alloy and the difference of the deformation mechanism.
结果表明，应力幅值的增加会导致合金高温疲劳寿命的下降及使变形机制改变。
The results presented here in can be used to predict transient temperature field, transient stress field, and fatigue lifetime of the steam turbine rotor.
所得结果可用于转子的动态温度场和应力场计算以及疲劳寿命预测。
The fatigue tests were performed at room temperature and cyclic strain and stress ratio of 0.1 with triangle load wave.
实验温度为室温，循环应变比和应力比均为0.1，载荷波形为三角波。
The main reason of inclined pipe fracture was low frequency stress fatigue failure at temperature field.
斜管开裂的主要原因是温度场下的低频应力疲劳破坏。
The main reason of inclined pipe fracture was low frequency stress fatigue failure at temperature field.
斜管开裂的主要原因是温度场下的低频应力疲劳破坏。
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