But steel alloys subjected to cyclic stress levels below their endurance limit rarely fail as a result of fatigue.

但是在钢铁合金的耐用度限制下，作为疲劳的结果，它们经受周期压力级别很少失灵。

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Fatigue strength is less than static stress strength such as elasticity limit, yield strength.

疲劳强度低于弹性极限或屈服强度等静应力强度。

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The primary cause of breakage is that the dynamic stress exceeded the allowable fatigue limit of the beam, and another cause is that the structure of the beam is unreasonable.

通过计算证明引起断裂的根本原因是动应力超过了梁的许用疲劳极限，另一原因是梁的结构不合理。

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For those of you who push yourselves to the limit, remember that fatigue is notoriously destructive.

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But steel alloys subjected to cyclic stress levels below their endurance limit rarely fail as a result of fatigue.

ECONOMIST: Aircraft fatigue