利用对数疲劳寿命标准差的经验取值，得出了焊接接头对应一定置信度下不同安全概率的低温疲劳寿命表达式。
By means of the experiential value of logarithmic fatigue life standard error, the safety fatigue life of welded joints was obtained at different safety probability with certain confidence level.
碳钢具有高温和低温强度，具有很高的韧度和优异的抗疲劳强度。
Carbon steel has high and low temperature strength is very tough and has excellent fatigue strength.
球铁经常使用在高温、低温循环的环境中，它的热疲劳性能被认为是最重要的性能之一。
The ductile iron is often used in high and low cyclic temperatures condition, its thermal fatigue property is regarded as one of the importantest material properties.
经室内路用性能试验验证，用本方法设计的沥青混合料具有优良的抗滑、防渗、抗车辙以及耐低温和疲劳的性能。
Through evaluating the pavement performance of asphalt mixture in laboratory, the asphalt mixture designed by the method has a super pavement performance.
通过管节点模型试样的低温和常温疲劳试验，得出了低温环境对试样疲劳s - N曲线的影响系数。
The fatigue performances of welded specimen of tubular joints are tested at low temperature and normal temperature.
沥青混凝土的累积耗散能与疲劳寿命成正比，低温时在消耗相同能量时的疲劳寿命比常温时高。
Cumulated dissipated energy of asphalt concrete is proportional to the fatigue life, which is longer at the lower temperature than at the room temperature while the consumed energy is the same.
本文还对裂纹扩展途径与断口形貌之间的关系进行了分析，对进一步研究低温用钢的疲劳特性和低温下工程结构的失效分析具有重要意义。
We also analyse the relationship between crack growth track and fractography. Thereforde, it is significant for studying the fatigue property of the steel used and its fatigue analy…
结果表明，机械应力下疲劳强度的劣化是低温电树枝化的重要因素。超高分子量聚乙烯具有低温性能好。
The test results with the needle-plane electrode system under ac voltage at 77 K indicate that the fatigue break in UHMW-PE under mechanical forces during the electrical treeing is a critical factor.
结果表明，机械应力下疲劳强度的劣化是低温电树枝化的重要因素。超高分子量聚乙烯具有低温性能好。
The test results with the needle-plane electrode system under ac voltage at 77 K indicate that the fatigue break in UHMW-PE under mechanical forces during the electrical treeing is a critical factor.
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