The filament-wound pressure vessels are geometrically complex due to various dome shapes. Arbitrary dome shapes with various fiber orientations and thicknesses of pressure vessels make the analysis complicated.
In this study, finite element analysis is carried out to investigate the geometrical nonlinear behavior of filament-wound pressure vessel under internal pressure. The updated Lagrangian formulation of the axi-symmetric degenerated shell element is used for geometric nonlinear shell problems. The Newton-Raphson iterative method is employed to solve incremental nonlinear equations. Dome contour in the pressure vessel is determined by netting analysis. The analysis takes into account the various fiber orientations and thicknesses along the dome contour. Analytical results are presented with displacements and strains including the effect of geometrical nonlinear and the effect of hoop winding thickness and radius of boss. The dome part exhibits significantly nonlinear behavior.
