Deployment Characteristic Analysis And Manufacture Of Deployable Composite Structures

Deployable structures are generally manufactured by carbon fiber reinforced polymer composite,which are widely used in the aerospace community due to their light weight,high flexibility,high storage efficiency,and high deployment reliability.The application of composite deployable structures in spacecraft deployable system can effectively save storage space and reduce the complexity of the system.This paper takes the composite deployable structures as the research objects,and investigates the characteristics of the deployable structures by theoretical prediction,experimental test and simulation analysis.The specific work of this paper is as follows:1.This paper manufactures the bistable C-shaped boom by vacuum bag pressure method and the deployable lenticular boom by molding pressure method with carbon fiber reinforced polymer composite material.Some mechanical parameters of the manufacturing material are measured by experiments,and the parameters with low experimental feasibility are predicted by the multi-scale model,which has been verified by comparing with the experimental results.2.The research presented herein predicts the bistable characteristic parameters of the bistable C-shaped shell by the principle of minimum potential energy,such as the value of bistability criterion coefficient S,the coiled radius and the stored strain energy of the second stable state.The load-displacement curves have been obtained by electro-mechincal universal testing machine WDW-20 and the maximum principal strains during the snap through process have been measured by DIC experimental tests.An finite element(FE)modeling are performed to analyze the strain energy distribution during the snap through process.And,effects of number of plies and ply angles of the plain woven laminate on the strain energy at the second stable state,the value of bi-stability criterion coefficient S,and the coiled radius have been studied.3.The deployment behavior of the deployable lenticular boom has been analyzed by experimental tests and finite element simulation.And the compression experiment,coiling experiment,compression simulation and coiling simulation have been compared for verification.The coiling process of the lenticular boom has been divided into two parts:compression and bending,in order to study the distribution regularities of stress and strain energy during the coiling process.Effects of ply angles on the strain energy in the two processes of compression and bending have been studied.4.The strain energy stored in the coiled boom,maximum Mises stress and bending performance of bistable C-shaped boom and deployable lenticular boom have been compared and analyzed,and the influence of reel radius on the coiling process of C-shaped boom and lenticular boom was investigated.