介绍了复杂载荷下疲劳裂纹形成寿命预测的方法。
The methods of fatigue crack initiation life predictions under complex load are introduced in this paper.
本文提出一种零部件的裂纹形成寿命的类比估算方法。
A method for crack initiation life prediction of components is presented.
采用此方法确定疲劳缺口系数，获得的损伤参量与裂纹形成寿命关系的数据分散带最窄。
If the plastoelastic fatigue notch factor was regarded as the transforming factor of damage calculation, the data scattering zone of life curve was most narrow.
结果表明：加入微量镁，不仅能延长合金的蠕变裂纹形成寿命，而且能提高合金的蠕变韧性。
The results show that addition of small amounts of Mg can not only notably increase the creep crack growth life but also increase creep toughness.
通过对结构疲劳裂纹形成寿命和裂纹扩展寿命的研究，提出了连接件疲劳全寿命的计算方法。
A calculating method of the total fatigue life of structural joints is proposed based on a study on both the fatigue crack initiation life and crack growth life of joints.
特别是运输机谱中的地—空—地循环，在裂纹扩展的公式中对裂纹形成寿命的贡献估计不足。
Especially the contribution to crack initiation life of the ground-air-ground circle in the crack growth formula is underestimated under the transport spectra.
对于不同应力水平作用下的循环时间可计时累加并再现，可为疲劳裂纹形成寿命的预测提供依据。
The circle time under different stress level is accumulated and can be reappeared, so that the basis data is provided to predict surface fatigue crack forming life.
预应变可以延长疲劳裂纹形成寿命，提高疲劳裂纹形成的抗力系数和裂纹形成的当量应力门槛值；
The pre-straining prolonged the fatigue crack initiation life, and increased resistance coefficient and equivalent stress threshold of the fatigue crack initiation.
用该方法分析了一个缺口试件在随机谱载下的裂纹形成寿命，结果比常规的有效系数和雨流法更接近试验结果。
The fatigue life of a notched specimen under random loading spectrum is evaluated by means of the present method.
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。
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.
机械零（构）件的寿命由裂纹形成时间（即疲劳寿命）和裂纹扩展寿命两部分组成。
The whole life of an equipment part consists of the crack forming life (i. e. , the fatigue life or the damage accumulation life) and the crack extension life.
本文讨论在复杂载荷下疲劳（裂纹形成）寿命的估算方法。
Fatigue (information) life predictions under complex loading are discussed in this paper.
本文讨论在复杂载荷下疲劳（裂纹形成）寿命的估算方法。
Fatigue (information) life predictions under complex loading are discussed in this paper.
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