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Research On The Relevance Between The Burst Pressuree Of Composite Pressure Vessel And The Basic Mechancial Properties Of Materials

Posted on:2020-12-06Degree:MasterType:Thesis
Country:ChinaCandidate:W J JiFull Text:PDF
GTID:2392330590973557Subject:Materials engineering
Abstract/Summary:PDF Full Text Request
The increasing tendency of the application of hydrogen energy asks for higher demand of hydrogen storage,which leads to the urgent research of cylinders to satisfy the strict requirement of the hydrogen storage.Composite pressure vessel,with its advantages of light weight,high strength,safety and reliability attracts a lot of scholars' attention,especially the numerical simulation analysis of the stress of composite pressure vessel.The effective simulation of burst pressure of pressure vessel can not only predict the burst pressure of pressure vessel,but also relate the basic mechanical properties of composite material system with the burst pressure of pressure vessel.Therefore,this paper uses the finite element software ABAQUS to simulate the burst pressure of pressure vessel,aiming to establish a relatively accurate finite element model,and explore the correlation between burst pressure of pressure vessel and the basic mechanical properties of composite material system.Firstly,the microscopic interfacial wet properties of three kinds of materials were characterized by dynamic contact angle testing of carbon fiber T700/ e-51 epoxy resin,carbon fiber T700/TDE85 epoxy resin and aramid fiber/e-51 epoxy resin.The interfacial shear properties of the three materials were characterized by microdroplet debonding test.The mechanical properties of three materials were characterized by tensile,compression,bending and interlaminar shear tests used universal testing machine.According to the data,the mechanical properties is in accordance with excellent microscopic interface performance,which is carbon fiber T700/TDE85 epoxy resin > carbon fiber T700/ e-51 epoxy resin > aramid fiber/e-51 epoxy resin,and provided data basis for finite element analysis.Secondly,the burst pressure of pressure vessel was analyzed through the method of finite element analysis.In order to obtain the influence of mechanical property parameters on burst pressure of pressure vessel,the basic mechanical property parameters of carbon fiber T700/TDE85 epoxy resin material were adjusted for virtual test.The influence of each mechanical property parameter on burst pressure and burst position of composite pressure vessel was obtained.The shear modulus has the greatest influence on the burst pressure of composite pressure vessel,followed by the main direction tensile modulus and poisson's ratio,and the longitudinal tensile modulus has the least influence.Finally,two composite pressure vessels mentioned above are prepared by experiments,and tested burst pressure by hydrostatic burst testing.The burst pressures of carbon fiber T700/E51 epoxy resin and carbon fiber T700/TDE85 epoxy resin composite pressure vessels were respectively measured to be 17 Mpa and 22 Mpa.It is found that the predicted value and tested value with a deviation within 3%,which indicated that the method is reliable to simulate the burst pressure of composite pressure vessels.
Keywords/Search Tags:composite pressure vessel, finite element, carbon fiber T700, mechanical propertis, burst pressure
PDF Full Text Request
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