Non-linear Analysis of Cylindrical Pressure Hull with Functionally Graded Materials

The pressure hull is one of the main structures of underwater vehicle, mainly designed to withstand the compressive forces associated with hydrostatic pressure. The ring-stiffened cylindrical hulls have better structural performances and are widely used in underwater vehicles and submarines. Functionally Graded Material (FGM) may be characterized by the variation in structure and composition gradually over volume, resulting in corresponding changes in the material properties. FGM found its applications in marine, submarine industry and defence especially for pressure hull and bullet proof underwater vehicle. In this study, non-linear static and dynamic analysis on cylindrical pressure hull with FGM has been done using ANSYS Mechanical APDL. The study included modelling and analysis of cylindrical pressure hull with different materials such as Steel, Titanium, Steel-Aluminium FGM and Titanium-Aluminium FGM with fixed and pinned boundary conditions. Deflection, von-Mises stress and von-Mises strain of different models were compared.