一个中心有切口的薄壁构件进行随机加载，尽管应力远远低于材料的屈服值，它仍然有可能会因为疲劳产生破坏。经过长时间加载后的破坏分析。使用 Rainflow 计数算法来定义了载荷情况，Palmgren-Miner 线性破坏模型计算破坏。-A center with a cut of the thin-walled member for random loading, although the stress is much lower than the yield value of the materi