The results of fatigue tests of samples made of S355JR steel under random tension-compression with nonzero mean stress are presented. The procedure of experimental research is described. The obtained experimental results are presented with the use of Wöhler fatigue graphs. The algorithm for the determination of the fatigue life uses, among other things, a rainflow cycle counting procedure, as well as the Palmgren–Miner linear damage accumulation hypothesis and six selected models that take into account the effect of mean stress on the tested durability. We also display the plots for comparison of the experimental and computed lives. It is indicated, which of the considered models describes the impact of the mean stress on the fatigue life of the tested material within the scatter error 3.

中文翻译：

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S355JR钢在单轴恒幅随机加载条件下的疲劳寿命

介绍了 S355JR 钢样品在非零平均应力随机拉压条件下的疲劳试验结果。描述了实验研究的过程。使用 Wöhler 疲劳图呈现获得的实验结果。用于确定疲劳寿命的算法使用雨流循环计数程序，以及 Palmgren-Miner 线性损伤累积假设和六个选定的模型，这些模型考虑了平均应力对测试耐久性的影响。我们还显示了用于比较实验和计算寿命的图。指出了所考虑的模型中的哪一个描述了平均应力对散射误差 3 内被测材料疲劳寿命的影响。