疲劳极限

Comparison of bounding surface model and traditional elastic mechanics model of concrete

模型中采用了基于应变能量释放率空间的边界面模型，通过极限断裂面的不断移动模拟疲劳过程中损伤阈值的不断变化。

Main objectives of medium-temperature tempering: to get high elastic limit and yield strength as well as certain toughness and anti-fatigue.

中温回火的目的是获得高的弹性极限和屈服强度，并具有一定的韧性和抗疲劳能力。

The limit state equation of the component is constructed by the use of the new cumulative fatigue damage model.

利用本文提出的疲劳累积损伤模型，建立零件的极限状态方程。

The Royal Air Force pilots have reached the limit of fatigue, are still beyond the limit to continue fighting.

这些皇家空军的飞行员已经到了疲劳的极限，却还在超越极限地继续战斗。

The fatigue test of CFRP bars was carried out at the different cyclic stress, choose the 70% ultimate tensile stress of CFRP bar as the maximum cyclic stress, under the cyclic ratios of R=0.5 （the minimum-to-maximum stress ratio） and R=0 and the fatigue behavior of CFRP bars was investigated.

进行了不同循环应力下CFRP筋的常温疲劳试验，选取CFRP筋70％的极限拉伸应力作为最大循环应力，在R=0.5（最小循环应力与最大循环应力的比）和R=0的应力率下，测量了CFRP筋的疲劳寿命曲线，研究了CFRP筋的疲劳性能。

The pilots in the RAF reached the limits of exhaustion and then went beyond those limits, still fighting.

这些皇家空军的飞行员已经到了疲劳的极限，却还在超越极限地继续战斗。

We study the profile alloy fatigue endurance limit for product design fatigue performance indicators.

研究铝合金型材的疲劳持久极限，为产品设计提供疲劳性能指标。

Unlike steel, aluminum does have a fatigue and endurance limit.

与钢铁，铝也有疲劳和耐力极限。

Unlike steel, aluminum does have a fatigue and endurance limit.

与钢铁，铝的确有疲劳和耐力极限。

There are two causes leading fractures of the endodontic instruments. Firstly as the value of the toque inc1ases beyond the limited toque, the instrument will twist with no increase in toque and will fracture soon. The value of limited toque is proportional to 3 squares of the file radius.

根管器械断裂的原因主要有2个：一是扭转超过极限扭距，器械顺着扭转的方向发生塑性扭转直至断裂，圆杆的极限扭距与其半径的3次方成正比；二是器械在循环载荷下发生疲劳损伤，最后突然断裂。

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。