低周期疲劳是机械设备众多破坏因素之一，其特点是频率低，作用时间长，不会产生巨大变形和裂痕扩散缓慢。它经常使设备未达到极限载荷的......

The low cycle fatigue (LCF) behavior of two high strength steels, with nominal chemical compositions (mass fraction, %)o......