There are several opinions about the fatigue equivalent damage lines studied broadly at present.
关于疲劳等损伤线的研究目前存在几种观点。
The problems of quantitative expression of equivalent damage lines, the slope change of the lines and life prediction are also discussed.
还讨论了等损伤线的表达式，斜率变化和二级载荷下的疲劳寿命估算等问题。
On the basis of fatigue test under high-low two stresses loading, the paper testifies that the equivalent damage lines do not parallel each other and tend to converge slightly over the fatigue limit.
本文根据高低二级应力作用下的疲劳寿命试验，验证了等损伤线互不平行且向下汇聚。
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