Abstract: In order to make full use of the advantages of high strength and light weight of the composite materials, it is necessary to design the structure under the restriction of given design conditions. This paper took the wing of SAMPE super light composite competition as research object. According to the given configuration and work condition, we used the OptiSturct solver of Hypermesh to optimize a composite wing on structure, layer position, layer orientation and layer thickness. Considering the theoretical result and the manufacturing process, a kind of optimization design plan was given. Based on this design, material preparation and experiments were carried out. Hence, we made some improvement on the wing according to the result of experiments. Finally, we got the lightest wing which can satisfy the demand of load and displacement in the history of the contest.

Key words: composite wing, optimal design, threepoint bending, FEA (finite element analysis), Hypermesh