Optimization Design And Experimental Research Of Parallel Modular Composite Canister Cover

Composite missile launching canister cover has become a hot research field of missilelaunching device at home and abroad with the continuous upgrading of missile launching device.Parallel modular, as a new design pattern, has a wide application in the area of fleet missile launchingsystems with a high demand for its bearing strength. The progressive damage technique in the finiteelement method is adopted in this paper to analyze the pressure-bearing performance of compositemissile Launching canister cover. Both optimization design and experimental studies are conducted.This dissertation mainly includes the following content:According to relevant technical indicators, three kinds of commonly used launching canistercover are comparably studied and the cap structure is selected for its best performance. Through thenumerical analysis and experimental test of the preliminary design of launching canister cover, theinadequate of the foam sandwich principle of equivalence is proposed and the damage of the foamand bonded interface should be considered in the finite element analysis.A three-dimensional (3D) progressive damage model of the cover is built in ABAQUS. Hashincriterion is adopted to analyze the failure of composite, the constitutive relation of foam material isestablished through the UMAT subroutine program and the cohesive element is chosen for simulatingthe bonded interface. Based on the established model, the failure modes of laminates, foam andcohesive interface can be predicted. Then, the effects of different composite panel thicknesses, foamdensities and foam thicknesses on damage fracture of launching canister cover are discussed.According to the results of the numerical simulation, the optimal structure of the Launching CanisterCover, which could satisfy the requirements under the pressure-bearing condition, is obtained.In accordance with the optimal structure, the launching canister cover is manufactured. Theinternal pressure, external pressure and limit load are tested respectively through the pressure-bearingexperiment, which has validated the feasibility of the design procedure. The result of the experimentis consistent with the simulation result, proving the effectiveness of the model.