The bending fatigue tests of single-wall and double-wall corrugated paperboards were conducted to obtain the ε_rms–N curves under sinusoidal and random loads in this paper. The ε_rms–N equation of corrugated paperboard can be described by modified Coffin–Manson model considering the effect of mean stress. Four independent fatigue parameters are obtained for single-wall and double-wall corrugated paperboards. The ε_rms–N curve under random load moves left and rotates clockwise compared with that under sinusoidal load. The fatigue life under random load is much less than that under sinusoidal load, and the fatigue design of corrugated box should be based on the fatigue result under random load. The stiffness degradation and energy dissipation of double-wall corrugated paperboard before approaching fatigue failure are very different from that of single-wall one. For double-wall corrugated paperboard, two turning points occur in the stiffness degradation, and fluctuation occurs in the energy dissipation. Different from metal materials, the bending fatigue failure of corrugated paperboard is a process of wrinkle forming, spreading, and folding. The results obtained have practical values for the design of vibration fatigue of corrugated box.

本文通过单壁和双壁瓦楞纸板的弯曲疲劳试验，得到了正弦载荷和随机载荷下的ε _rms – N曲线。考虑到平均应力的影响，瓦楞纸板的ε _rms – N方程可以用修正的Coffin-Manson 模型来描述。获得了单壁和双壁瓦楞纸板的四个独立的疲劳参数。的ε_均方根- ñ随机载荷下的曲线与正弦载荷下的曲线相比向左移动并顺时针旋转。随机载荷下的疲劳寿命远小于正弦载荷下的疲劳寿命，瓦楞纸箱的疲劳设计应基于随机载荷下的疲劳结果。双壁瓦楞纸板在接近疲劳破坏之前的刚度退化和能量耗散与单壁瓦楞纸板有很大不同。对于双壁瓦楞纸板，刚度退化出现两个转折点，能量耗散出现波动。与金属材料不同，瓦楞纸板的弯曲疲劳失效是一个起皱、展开、折叠的过程。所得结果对瓦楞纸箱振动疲劳设计具有实用价值。