Design of Filament Wound Composite Pressure Tanks Using Finite Element Analyses

摘要

Filament wound structures such as rocket pressure tanks, pipes and motor cases are widely used inaerospace applications. However, most design and manufacturing of wound structures are based onmanufacturing experiences, and there are no established design rules. In this study, finite elementanalyses using ABAQUS were performed to predict the behavior of filament wound structuresconsidering continuous change in winding angle and thickness at the dome part due to fiber build-upnear the metallic boss. In addition, water-pressurizing tests on a motor case were performed to verifythe analysis procedure. Strain gages were attached on the surface in the fiber direction. Progressivefailure analysis predicted slightly higher burst pressure than the experimental results and the weakestregion of the motor case was predicted very well. On the basis of the verified finite element analysismethod, pressure tanks were designed with a load sharing metallic liner. Finally, an optimal designmodel satisfying design requirements was suggested.