(171e) Parametric Study of Type-IV Hydrogen Pressure Vessel to Predict the Buckling of Polymeric Liner Under Thermo-Mechanical Load

Hydrogen fuel is a clean & eco-friendly energy carrier for the modern world to decarbonize a range of industrial sectors including the automotive industry. But, the volumetric density of hydrogen gas is very low at ambient conditions. Therefore, to overcome this problem hydrogen gas should be stored at high pressure up to 700bar in advanced composite pressure vessels. Type-IV pressure vessel which is carbon fiber-epoxy overwrapped on a polymeric liner provides higher strength to weight ratio as compared to conventional metallic pressure vessels. However, the Thermoplastic liner is the most fragile part in the Type-IV pressure vessel that can lead to instability or buckling of the entire liner under the excessive compression load, which is generated during the filament winding process, rapid pressurization and depressurization of hydrogen gas rate. High fiber tension is key to the strength of the vessel through it generates more compressive load and buckling depends on material stiffness properties. Therefore, linear and nonlinear Buckling models are simulated in ANSYS 19.2 to study the effect of vessel geometry and manufacturing parameters such as length to diameter ratio, radius to thickness ratio, winding tension, winding angle and filament winding bandwidth under thermo-mechanical load for different liner material (HDPE, PA6, and PET), that determines the safe operational parameters for Type-IV hydrogen pressure vessel.