In this study, the structural integrity of a 6.8 L composite pressure vessel manufactured using H2550 carbon fiber was evaluated by the finite element analysis method, and the reliability of the analysis method was verified by comparing the hydrostatic test and analysis results. The pressure vessel was manufactured using the filament winding method and a hydrostatic test was performed to evaluate the failure mode and burst pressure of the manufactured composite pressure vessel. To construct the finite element model, a cyclic symmetric model, which only considers 1° of the front part, was used to reduce the analysis time and increase the modeling efficiency. As the carbon fiber was wound along the curved surface of the dome part, the winding angle and lamination thickness were modeled to change according to the dome radius. Comparison of the analysis and test results confirmed similar behavior in the axial and hoop strain diagrams due to internal pressure. In addition, it was found that the maximum fiber direction stress of the hoop layer showed an error of 3%, verifying the reliability of the finite element analysis method.

The munitions industry uses high-strength carbon fiber composites imported from other countries because of the lack of the information about the properties that should be satisfied by the domestic high-strength carbon fiber composites. Verification of the applicability of domestic high-strength carbon fiber composites to the munitions industry requires comparison of the fiber strength transition rate between the carbon fiber composites imported from other countries and domestically. A strand test was performed to evaluate in the unit of a fiber the mechanical properties of the imported high-strength carbon fiber composites and domestically. Additionally, a composite pressure vessel was prepared using the filament winding method to perform a hydrostatic pressure test and calculate the fiber strength in the unit of a structure. Comparison of the fiber strength results showed that the fiber strength transition rates of the domestic carbon fiber composites H2550 and H3055, were 86.35 and 74.19%, respectively. Domestic carbon fiber composite material H2550 is expected to be replaceable in the munitions industry.