The originating mechanism of fatigue damage of sliding friction couples is analyzed and that the ultimate causation of fatigue damage is dynamical stress state is pointed out.
分析了滑动摩擦副疲劳损伤的产生机理， 指出疲劳损伤产生的根本原因是动应力状态。
Therefore, it is necessary to analyze the mechanism of the fatigue damage of bridge expansion device and estimate its fatigue life by theories and experiment.
因此有必要通过实验及理论研究等工作，对公路桥梁伸缩装置进行疲劳破坏机理分析和疲劳寿命估算。
The mechanism of Fe-based alloy coating for thermal fatigue damage resistance of wheel cast steel was analyzed by SEM.
用扫描电镜分析研究了铁基合金涂层对车轮铸钢材料抗热疲劳损伤机制的影响。
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