基于能量耗散法,推导出了复合材料厚壁圆筒的疲劳损伤和疲劳寿命函数;在此基础上,采用有限元软件ABAQUS建立复合材料圆筒模型,进行了模拟周期内压载荷作用下的疲劳仿真计算,得到了随着循环数的增加,疲劳损伤变量不断增大和材料性能不断退化的损伤规律。以同样的方法和载荷边界条件计算了全金属圆筒疲劳损伤的起始和演化。对比结果表明:相同循环次数作用下,后者的裂纹扩展长度和张开位移更大;随着循环次数的增加,后者的疲劳破坏比前者更剧烈,更难预测。 Based on the energy dissipation method, the fatigue damage and fatigue life functions of the composite thick-walled cylinder were deduced. Based on this, the composite cylindrical model was established by the finite element software ABAQUS, and under the action of the pressure load in the simulation period Fatigue simulation calculation, with the increase of the number of cycles, fatigue damage variable increasing and material properties deteriorating the law of degradation. The same method and load boundary conditions were used to calculate the onset and evolution of fatigue damage of all-metal cylinder. The comparison results show that the crack propagation length and the open displacement of the latter are larger under the same number of cycles. The fatigue damage of the latter is more severe and more difficult to predict with the increase of the number of cycles.