fatigue load action

The probability fatigue life - span of pressure vessel under the action of different cycle load is closely related to the cycle load with high stress.

承受不同循环载荷共同作用的压力容器，其概率疲劳寿命和在高应力水平上的循环载荷有着密切的关系。

Corrosion fatigue damage of concrete is the coupling action result of corrosion medium and load fatigue, and the study on this has been in the stage of theory search.

混凝土腐蚀疲劳破坏是腐蚀介质与交变荷载耦合作用的结果，对其研究目前国内外还仅处于理论探索阶段。

The fatigue damage of the metal material often happens under the action of the dynamic load. The accumulation of fatigue damage of the metal material leads to the result of surface fatigue cracks.

金属构件常常因受到动载荷作用引起疲劳损伤，而疲劳损伤累积的结果往往导致裂纹的产生。