International Journal of Research and Innovation in Applied Science (IJRIAS) |Volume VII, Issue IX, September 2022|ISSN 2454-6194
Feysal Mohamed Shirwa
Masters in Structural Engineering, BSc in Civil Engineering
Senior Lecturer at Department of Civil Engineering of Zamzam University of Science and Technology
Somali International University, University of Somalia, Mogadishu, Banadir, Somalia
Abstract: This paper discusses the stresses developed in the pressure vessels having various thicknesses. Pressure vessels are intended to hold gases or liquids at a pressure substantially different from atmospheric pressure. Equations of static equilibrium along with free body diagrams will be used to determine the normal stress σ1 in the hoop direction and σ2 in the longitudinal direction also the von misses’ stresses. Also we will discuss the deformations and displacements to the pressure vessel using commercial finite element software called ANSYS for modelling and analyzing of the vessels. And the main results we found is that there is stress and deformation variation in the vessel according to thickness.
Key words: Analysis, pressure vessel, ANSYS, stresses, APDL, cylindrical, spherical, vertical
I. INTRODUCTION
A pressure vessel is defined as a container with a pressure differential between inside and outside. The inside /internal pressure is usually higher than the outside, except for some isolated situations.
Pressure vessels are compressed gas storage tanks intended to hold gases or liquids at a pressure substantially different from the ambient pressure. The analysis of pressure vessels encompasses many combinations of stresses. The safe design, installation, operation, and maintenance of pressure vessels are in accordance with codes such as American Society of Mechanical Engineers boiler and pressure vessel code. Longitudinal and hoop stresses are produced due to internal pressure and variable bending stress due to bending moment caused by wind loads. Therefore, a designer has to keep all the probable loads and moments on a pressure vessel [1].
Tanks, vessel and pipelines that carry, store or receive fluids are called pressure vessel. A pressure vessel is defined as a container with a pressure differential between inside and outside. The inside pressure is usually higher than the outside. The fluid inside the vessel may undergo a change in state as in the case of steam boiler or may combine with other reagent as in the case of chemical reactor. Pressure vessel often has a combination of high pressure together with high temperature and in some cases flammable fluids or highly radioactive material. Because of such hazards it is imperative that the analysis be such that no leakage can occur. Pressure vessels