疲劳抗力（fatigue performance）材料或零件抵抗循环应力作用而不发生断裂的能力。
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The stress concentration in the part of welded structure of the body results in cracking when the stress born exceeds the fatigue resistance of the material.
机体焊接结构存在局部应力集中，导致其所受应力超过材料疲劳抗力而产生裂纹。
参考来源 - 内燃机车柴油机铸焊机体工艺优化研究·2,447,543篇论文数据，部分数据来源于NoteExpress
随热循环上限温度升高，其热疲劳抗力降低。
The thermal fatigue resistance cuts down with the thermal cyclic upper temperature rising.
材料的断裂韧性可充分满足焊缝细节疲劳抗力的发挥。
The material fracture toughness was adequate to ensure development of the full fatigue resistance of the weld detail.
同时，对该合金优良的接触疲劳抗力的来源进行了探讨。
The mechanism of the good contact fatigue resistance of the alloy was investigated.
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