Pressure bearing and bursting performance of composite frangible cover
In this paper,a kind of composite thin-type frangible launch case cover with channel size of 650 mm×650 mm was designed,it can bear large internal pressure and small bursting load,the internal pressure converted to point load is 7 times the bursting load,proposed a structure design scheme of weak area and strengthening piece.The frangible cover was made and subjected to pressure and bursting tests.The result of test show that the structure of frangible cover is reasonable,it can withstand the internal pressure of 0.055 MPa,and the maximum deformation at the center point of the frangible cover is 19.83 mm,but only 3.03 kN of load is required to burst the frangible cover.In the paper,the finite element models of pressure and bursting test of the frangible cover were established respectively.The error between the analysis results and the test results is 12.7%and 8.0%,it can accurately pre-dict the deformation and strength of the frangible cover.Based on the finite element model,the influence of the number of strengthening piece at different positions and the different thickness on the deformation of the frangible cover was analyzed,the deformation is decrease when the number of strengthening piece in zone Ⅱ,Ⅲ and the thickness of frangible cover were increased.The research content of this paper can provide reference for the engi-neering production of the thin-type frangible launch case cover.
composite materiallarge size of frangible coverweak area structurefinite element analysis
万方数据
维普
