Design of Compressed Natural Gas Pressure Vessel (Type II) to Improve Storage Efficiency and Structural Reliability
- 28 October 2019
- journal article
- research article
- Published by ASME International in Journal of Pressure Vessel Technology
- Vol. 142 (1)
- https://doi.org/10.1115/1.4045027
Abstract
Type II storage vessel, which consists of liner hoop wrapped with a carbon fibre-resin composite to work at high pressure, has been widely adopted as the fuel container for CNG vehicles. The general vessel, manufactured by welding to connect open-end cylinder with end closures, shows uniform thickness throughout the whole liner, while the high pressure vessel, fabricated by the D.D.I. and spinning processes, has the integral junction of cylinder and ends and shows increment of the end thickness along the meridian direction. This study established a design method for improvement of failure resistance and inner capacity of the seamless CNG pressure vessel (Type II) through finite element analysis with consideration of thickness variation. Autofrettage pressure to enhance fracture performance and fatigue life of the vessel was suggested, and variations of stress behaviors in the liner and composite were analyzed during the autofrettage process, and influence of the composite on generation of compressive residual stress was investigated. In order to verify advantages of the D. D. I. and the spinning processes for structural safety at end, the stress distribution considering thickness variation was compared with that with uniform thickness, and maximum inner capacity satisfying structural reliability was obtained. The inner capacity of the proposed model with the ratio of major axis to minor axis, 2.2, was expanded by 4.5%, compared to the existing one, and theoretical equivalent stresses were compared with those from the simulations, and the technique of FEM was verified.Keywords
Funding Information
- National Research Foundation of Korea (2019R1F1A1058521)
This publication has 16 references indexed in Scilit:
- Determination of the autofrettage pressure and estimation of material failures of a Type III hydrogen pressure vessel by using finite element analysisInternational Journal of Hydrogen Energy, 2012
- Shape optimization of thin-walled pressure vessel end closuresStructural and Multidisciplinary Optimization, 2012
- Autofrettage of layered and functionally graded metal–ceramic composite vesselsComposite Structures, 2010
- Residual stress analysis of autofrettaged thick-walled spherical pressure vesselInternational Journal of Pressure Vessels and Piping, 2010
- Buckling of multilayered metal domesThin-Walled Structures, 2009
- Fracture analysis of hydrogen storage composite cylinders with liner crack accounting for autofrettage effectInternational Journal of Hydrogen Energy, 2009
- Autofrettage and Reautofrettage of a Spherical Pressure VesselJournal of Pressure Vessel Technology, 2006
- Minimization of stress concentration factor in cylindrical pressure vessels with ellipsoidal headsInternational Journal of Pressure Vessels and Piping, 2002
- Design, Analysis, Manufacture, and Test of Shallow Water Pressure Vessels Using E-Glass/Epoxy Woven Composite Material for a Semi-Autonomous Underwater VehicleJournal of Composite Materials, 2002
- Discontinuity stress analysis of pressure vessels using the finite element methodNuclear Engineering and Design, 1975