The results show that the crack growth rate under high-low cycle complex fatigue load is greater than that under low cycle fatigue load, and so the fatigue life is obviously reduced.
结果表明：与纯低周载荷作用相比，高低周复合载荷下球墨铸铁的裂纹扩展速率明显加快，极大地降低材料的疲劳寿命。
The individual cycle-strain hysteresis loops were recorded, and the cycling response and high temperature low cycle fatigue life were obtained.
记录了各自的循环应力—应变滞后环，得出了试样的循环响应特征和各试样的高温低周疲劳寿命。
Based on the orthogonal test design, this paper studied the effect of low cycle stress, high-low cycle stress ratio , high cycle number and high cycle frequency on complex fatigue life.
在高低周复合疲劳研究中采用了正交试验设计的方法，并以此为基础综合研究了低周应力、高低周应力比、高周循环次数和高周循环频率对复合疲劳寿命的影响及其机理。
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