疲劳极限

The fatigue or endurance limit is the maximum stress below which a material can presumably endure an infinite number of stress cycles.

疲劳忍耐极限是指材料在趋向无穷多的应力循环下能够承受的最大应力。

The fatigue limit of the S-N curve is found to be about 30% of the ultimate static failure stress, which validates the value suggested by the UK guidance.

其疲劳极限值约为静载作用下极限界面主应力的30%，与英国规程中的规定相符。

At last, making use of load stress chart of old steel bridge, and looking facture criterion as ultimate state equation to carry through reliability analysis. Adopting Probabilistic fracture mechanics to estimate remaining fatigue life of old steel bridge under given reliability.

最后结合我国老钢桥的载荷应力谱，以断裂判据为极限状态方程进行可靠性分析，并利用概率断裂力学方法对给定可靠度下老钢桥的剩余疲劳寿命进行预测。

The faults include the fracture of saddle support mat , the breakdowns of saddle support bolt and pin spindle.

其中，鞍座底板断裂、鞍座连接螺栓和销轴断裂，通过断口形貌和受力分析，判断故障原因为典型的疲劳断裂；大小齿面磨损变形严重是齿轮硬度不足、齿面接触应力超过材料抗剪屈服极限及润滑方法不当造成。

The faults include the fracture of saddle support mat, the breakdowns of saddle support bolt and pin spindle. Based on the analysis on the fracture and surface, the fault causes are analyzed, for the conclusions of the normal fatigue fracture, as well as the deficient gear hardness, higher contact stress of tooth face than the yield limit under shear of material and improper lubrication method, which bring serious abrasion deformation of tooth face.

其中，鞍座底板断裂，鞍座连接螺栓和销轴断裂，通过断口形貌和受力分析，判断故障原因为典型的疲劳断裂；大小齿面磨损变形严重是齿轮硬度不足，齿面接触应力超过材料抗剪屈服极限及润滑方法不当造成。

Slower reactions in the individual; a marked increase in cases of battle fatigue, and a lower standard of battle efficiency—all showed quite clearly that the limit was fast approaching.

个体反应越发迟钝；一个标志是战斗疲劳病例猛增，以及低水准战斗效率——所有人均非常明显表现出极限很快到来。

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。