The results showed that failure morphology was of typical contact fatigue characteristics, and two modes of fatigue crack formation worked.
结果表明，失效形貌呈典型的接触疲劳特征，两种疲劳裂纹形成模式同时存在。
The results show that metallurgical defect is the main reason leading to early formation of fatigue crack under normal working stress.
认为，该曲轴材料的冶金缺陷是导致疲劳裂纹在正常工作应力下过早形成的原因。
And formation of typical fatigue striation on fatigue crack steady propagation is difficult.
其疲劳裂纹的稳定扩展也较难形成典型的疲劳条带。
The crack formation of thermal shock fatigue is related to the nucleation, growth and join of microvoid.
热冲击疲劳裂纹的形成与微孔洞的形核、长大和连通有关。
The formation mechanism of thermal shock fatigue crack of cemented carbide YG10 was investigated.
研究了YG10硬质合金热冲击疲劳裂纹的形成机制。
The effect of re modification and heat treatment on formation of thermal fatigue crack in low chromium wear-resistant cast iron was investigated.
研究了稀土变质及热处理对低铬耐磨铸铁热疲劳裂纹形成的影响。
During the fatigue process, the formation of the main crack expends most of the whole fatigue life, and once the main crack forms, the crack propagates rapidly and fractures immediately.
疲劳过程中主裂纹的形成消耗了大部分的疲劳寿命，一旦主裂纹形成就快速扩展瞬间断裂。
Based on the practical engineering in Yangtai region, analysis is made on the causes of formation of the non-loaded fatigue crack early in asphalt pavement, and given the preventions.
结合扬泰地区工程实例，分析了沥青路面两类早期非荷载疲劳裂缝产生的原因和开展形式，并提出工程防治措施。
Firstly, the paper analysed the formation mechanism of the fatigue crack in asphalt pavement with semi-rigid base.
首先，论文分析了半刚性基层沥青路面疲劳裂缝的形成机理。
Firstly, the paper analysed the formation mechanism of the fatigue crack in asphalt pavement with semi-rigid base.
首先，论文分析了半刚性基层沥青路面疲劳裂缝的形成机理。
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