Fiber path design and mechanical performance analysis of asymmetric dome composite pressure vessels

Abstract

Fiber path design plays a pivotal role in determining the forming quality of composite pressure vessels. Current methodologies for asymmetric dome structures predominantly rely on constant slippage coefficient non-geodesic trajectories, which significantly constrain design flexibility. To overcome this limitation, this study proposes a fiber path design method for asymmetric dome composite pressure vessels based on a variable slippage coefficient non-geodesic trajectories. The research framework comprises three principal components: First, development of a novel fiber trajectory model through variable slippage coefficient non-geodesic formulation. Second, systematic establishment of five distinct fiber path design patterns with corresponding implementation schemes for cylindrical sections. Additionally, simulation analyses are conducted on the winding angle, slippage coefficient, and the five fiber path winding types using MATLAB. Finally, under internal pressure strength requirements, Barlow’s formula and netting theory are applied to design the liner and fiber layers, respectively. ABAQUS is employed for modeling and mechanical performance analysis. The results demonstrate the feasibility of the proposed variable slippage coefficient non-geodesic filament winding method for asymmetric dome pressure vessels. Finite element analysis confirms the structural reliability of the composite pressure vessel under internal pressure. This study provides valuable reference for fiber path design in asymmetric dome composite pressure vessels.