带金属接头的复合材料壳体内压变形分析

Numerical analysis of the translation of the filament winding composite case with metal boss

采用数值方法对某2 m纤维缠绕壳体封头在内压作用下的位移进行了分析。采用层合单元建立该纤维缠绕壳体封头的变厚度数值分析模型,得到壳体内压作用下的变形模式。数值分析结果与水压试验得到的封头位移数据基本吻合。研究结果表明,带金属接头的复合材料壳体开口尺寸决定了前后封头的位移模式。前封头以复合材料部分的内压变形为主,在距离极孔约400 mm位置处发生最大位移,其值为21.8 mm。后封头以金属部分的内压变形为主,在后堵盖处发生最大位移,其值为30.4 mm。

A numerical method was used to analyze the displacement field of filament winding composite case subjected to internal pressure.A layered solid element was used to simulate the filament winding composite dome with varying thickness.The numerical analysis results of the displacement fields of the domes agreed with the hydrostatic test results.The research reveals that the displacement fields of the filament winding composite case with metal boss are determined by the size of the boss.The leading displacement of the fore dome is mainly about the composite case subjected to the internal pressure.The maximum value is 21.8 mm and the distance of the region to the polar is 400 mm.On the other hand,the leading displacement of the aft dome is mainly about the metal part subjected to the internal pressure.The maximum value is 30.4 mm and occurs in the aft closure.