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疲劳极限

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A kind of method to evaluate and test the tension-compression fatigue strength of gray cast iron was introduced in this paper.

介绍了一种评价与测试灰铸铁铸件的拉压疲劳极限的方法。

Researches on the earth's land surface processes and the geological environment essential factor and its dynamic mechanism have demonstrated that only with the equilibrant system of the low-temperature and low-stress and the scattered as well as dense multi-grains, the boundary condition for the slow, long-term and intermittent pulsation action can meet the formation conditions of such a rock deformation structure.

通过物理模型分析和试验变形比对等综合材料证明,变形砾石是遭受了既密集、又分散、还具有同时发生作用的长时期的多边界外力条件及平衡力系,内部形成破裂其应力传递过程和性质改变与变形形迹转变及其做功连续扩展,是由低于疲劳极限的具有脉动性作用微弱应力造成的。

The stress concentration factor is introduced to modify the fatigue limit and a practical damage evolution equation is established.

引入应力集中因子修正疲劳极限,提出一种实用有效的损伤演化方程。

Center sill and body bolster are important component of gondola car, and it is a big threat to the safety operation when the component occurs fracture, so the fatigue limit with high confidence level and high reliability must be gained first.

中梁和枕梁是敞车的重要组件,如果该组件发生断裂,会对行车安全构成极大威胁,所以首先要得到该组件具有高置信度、高可靠度的疲劳极限

Extreme Small Sample; Bayes Method; Virtual Expanding Method; Reliability; Fatigue Limit; Center Sill and Body Bolster; Gondola Car

极小子样; Bayes方法;虚拟增广方法;可靠性;疲劳极限;中枕梁结构;敞车

Because the HMA fatigue limit is the theoretical base of perpetual pavement design, to grasp the strain distribution and strain action of HMA layer is key for perpetual pavement design.

沥青混合料疲劳极限的存在是永久路面结构设计的主要理论依据,因此掌握沥青层底应变的分布和应变行为规律是永久路面设计的关键。

Second, the random variables in reliability analysis of the steel rail are discussed. These random variables include the wheel load, the stiffness of the rubber pad and the bed, the temperature stress and the fatigue ultimate strength of the steel rail. And their probability distributions and parameters are discussed thoroughly.

其次,对钢轨可靠度分析中涉及的随机变量如轮载力、轨下胶垫刚度、道床路基联合刚度、温度应力及钢轨疲劳极限强度的概率分布类型和统计特征进行了详细讨论。

A technique for dealing with confidence limit-reliability-stress curves of up-and-down test was presented to obtain a more accurate endurance limit.

为获得安全可靠的疲劳极限,提出了处理升降法试验数据置信限-可靠度-应力曲线方法。

The endurance limit of the composite was about 750 MPa, which is much higher than about 600 MPa of the SCS6 fiber reinforced Ti matrix composites.

研究结果表明,(Al2O3)f/Al复合材料的疲劳极限为750 MPa,远高于SCS-6碳化硅纤维增强钛基复合材料。

Endurance—Alternate term for Fatigue Limit.

耐久力—疲劳极限的另一个术语。

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Chrysanthemum of 10 thousand birthday is lax to edaphic requirement, with the arenaceous qualitative loam with fecund, good drainage had better.

万寿菊对土壤要求不严,以肥沃。排水良好的砂质壤土为好。

He unstepped the mast and furled the sail and tied it.

他拔下桅杆,把帆卷起,系住。

Therefore, positively advances the interest rate marketability reform is one of current our country finance reform important tasks.

因此,积极推进利率市场化改革是当前我国金融改革的重要任务之一。