Structural Analysis Of Filament-wound Thick Wall Vessel With Carrying Liner

FW thick wall pressure vessel with carrying liner does not only utilize machining property, airproof property and high intension high toughness that liner materials have, but also utilize the merits of high stiffness and intension, design property, which composite materials have. So FW thick wall pressure vessel with carrying liner is compared with mental vessel, which does not decrease the weight of vessel, but also increase safety. It cannot bring mental fragility. All of these make the FW pressure vessel with excellent properties and commercial values, which are light weight, good safety and high capability price ratio. Because FW thick wall pressure vessel with carrying liner has good capability and commercial value, the structural analysis of FW thick wall pressure vessel with carrying liner has great values. The importantly theoretic task to structural design and optimal design of FW thick wall vessel is declared.Firstly, structural analysis for FW thick wall pressure vessel with carrying liner is obtained by two-dimensional and three-dimensional elastic-plastic theory. Stress and strain distribution through wall of vessel is presented during variable mechanical states. Elastic and plastic terminal of vessel, maximum internal pressure that metal liner can't be yielded in the opposite direction and basic condition that vessel works on stable state are presented. The basic distribution regulations for remnants stress in vessel and application of remnants stress in autofrettage are analyzed.Secondly, stress and strain distribution regulations in cylinder during two-dimensional and three-dimensional elastic-plastic estate and autofrettage back and forth are analyzed by chart. That the structural parameters of pressure vessel have an effect on the mechanical properties of vessel is analyzed. That the fatigue life and carrying capacity of pressure vessel can be improved by autofrettage is researched.Lastly, stress distribution law of pressure vessel through wall of vessel is obtained by finite element analysis, which is used to testify the validity of structurally theoretic analysis of FW pressure vessel.