封头开有极孔的CFRP压力容器壳体的有限元分析

Finite Element Analysis of CFRP PRESSURE VESSEL with Opening Polar Hole in Its Head

首先利用网格理论计算出碳纤维缠绕复合材料压力容器的缠绕角、环向和螺旋向缠绕纤维的厚度及各相应的层数。由于碳纤维复合材料包括纤维和树脂基两种材料,在考虑纤维体积含量的情况下计算了环向和螺旋向单层纤维的厚度。使用ANSYS有限元软件建立了碳纤维缠绕复合材料压力容器模型,对金属材料的接头与碳纤维复合材料的筒体及封头分别定义了不同的单元类型,并对接头和封头连接的薄弱区域进行了补强。最后加载求解,结果显示最大应力出现在筒身处,与爆破试验相吻合。

First the winding Angle,the thickness of the hoop and spiral winding fiber and the corresponding layers of the carbon fiber winding composite material pressure vessel were calculated by using the grid theory.Due to the carbon fiber composite materials is constituted of fiber and resin base,the thickness of single hoop and spiral winding were calculated on condition of considering the fiber volume content.The model of carbon fiber winding composite material pressure vessel was established by using ANSYS finite element software.Joint with metal materials and the barrel and its head with carbon fiber composite material were defined different element types.And the weak area of connection of the head and the joint was reinforced.At last the model was loaded and solved.The results showed that the maximum stress of the model appeared in the cylinder shell.The result was better consistent in the blasting test.