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Design And Analysis Techniques For Carbon Fibre Composite Pressure Vessel With Aluminum Alloy Liners

Posted on:2008-05-28Degree:MasterType:Thesis
Country:ChinaCandidate:X ZhangFull Text:PDF
GTID:2132360242999107Subject:Aerospace engineering
Abstract/Summary:PDF Full Text Request
The pressure vessel with carbon fiber wound AL alloy internal liner not only has the low density,machining property,airproof property,high toughness and high intension of AL alloy materials,but also has the advantage of lightweight,high ratio stress and ratio modulus,high safety,well design property of carbon fiber materials, which make it having high bearing pressure,long fatigue life and anticorrosive ability.Composite pressure vessel is made of fiber winding composite layers and metal internal liner.The fiber winding layers includes longitudinal winding layers and circular winding layers.The dome is molding by longitudinal fiber winding.Cylindrical part of the vessel is molding by both of the two winding ways.When the composite pressure vessel is under internal pressure,the composite layers suffered 85%to 95%of the pressure while the aluminum internal liner suffered 5%to 15%of that.First,the structure of aluminum alloy internal liner was designed.The dome of aluminum liner was elliptical.The thickness of the wall was designed to 2mm.The ratio of length to radius was 2.7.The composite layers of the pressure vessel were primarily designed.The thickness,the number,the laying ways and the winding angle of the composite part were ascertained.Then the whole structure of the pressure vessel was analyzed by the method of FEA(finite element analysis) in ANSYS.Different element types(SOLID185 and SOLID46) were respectively used for aluminum alloy liner and composite winding layers.The 1/24 of the whole entity model was built and the two cut areas of the model were fixed by symmetry constrains settings.The internal pressure was 90MPa.The calculated results show that the aluminum internal liner was already in the plastic state.The stress of the cylindrical part was from 380 to 410MPa.The maximum stress of the composite part was 2416MPa which was close to the terminal stress 2940MPa.A pressure vessel was manufactured based on the design and the water pressure test was carded out.When the pressure was up to 93MPa,the aluminum internal liner and the composite part were broken almost at the same time.The experimental result fitted the calculating result.
Keywords/Search Tags:carbon fibre composite, Aluminum alloy, filament, finite element analysis, structural analysis
PDF Full Text Request
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