Analysis of Thick-Walled Composite Cylindrical Pressure Vessels Under The Effect of Cyclic Internal Pressure And Cyclic Temperature

A problem common to the pressure vessels’ designer and engineers is the evaluation of stresses due to the effect of both cyclic temperature and pressure. In this research، analysis of thick walled hybrid laminated composite pressure vessels subjected to both cyclic internal pressure and temperature، is investigated. At first، stress and strain equations by theoretical methods are evaluated and then the time dependent temperature distribution due to internal cyclic temperature within the wall of vessel using a numerical model basis of the finite difference technique is evaluated. Consecutively stresses and strains distribution versus time، effect of fiber angle on these stresses and strains، effect of vessel thickness and effect of layer number and fiber angle on pressure-temperature vessel capacity are investigated. Pressure-temperature curve is presented for static pressure and steady state temperature using Hoffman theory for vessel with different laminate boron-epoxy and Graphite-epoxy composites.