The Burst Test And Finite Element Analysis Of Carbon Fiber Composite Shell

Due to the carbon fiber composite material with high specific strength, high specificmodulus, corrosion resistance, high temperature etc, it is widely developed in the aviationfield weaponry industry and civilian industry. Because composite pressure vessel startedlate in our country, and is mainly used in the field of aerospace and weaponry industry, thedevelopment of the civilian industrial areas is slow too. There are only two companies areapproved the production of high-pressure composite vessels. In recent years, due to thesharp increase in energy shortage, clean energy, natural gas vehicles, which makes highstrength, high modulus composite pressure vessels are valued at this stage. Finite elementanalysis and burst test of carbon fiber composite pressure vessels were researched in thispaper.Burst pressure, thickness of cylinder fiber and winding angle were calculated throughconsulting lots of literature about classical mechanics of composite materials andcomposite structural mechanics, combining T700carbon fiber mechanical properties, usinggrid analysis method of filament-wound pressure vessels. Based on the data obtained, thefiber composites shop layer was determined, and the model of carbon filament woundpressure vessel was built, burst test was implemented using known conditions. The modelof cylinder and head which are belonged to carbon filament-wound case were built bysoftware of ANSYS finite element analysis. Because it is difficult to build the model ofcomposite pressure vessel, some assumptions were proposed in order to simplify the model.Imposed procedures of meshing, load and constraints were completed after modeling, thestress results of composite pressure vessel cylinder and head were obtained by calculating.The stresses of the shell by28MPa,30MPa,32MPa,36MPa were analyzed in this paper sothat the model could be compared with the burst test of vessels. Differences of model andburst test were discussed.At the same design conditions (shell size, load and meshing are the same), four plyprograms were designed. Half of the model was analyzed by using ANSYS finite elementsoftware. With the results of analysis, Stress change of filament wound pressure vesselswere affected by the winding angle change. More reasonable plies were obtained in the actual project, and unnecessary waste is reduced in the production test.