Joints Design And Optimization On The Composite Wing Separating Surface

The joints design of the composite wing separating Surface is an important part of the wingstructural design. This paper treats the joints design of the composite wing separating surface of aunmanned aerial vehicle as the engineering background, and combined with wing configuration, itdetermines the general joint scheme of the wing separating surface through the analysis of severalcommon wing connection forms，and carried on a preliminary design of the detailed sizes accordingto the separating surface load.Because of the alternating load action in the use of the coaming docking part, the finite elementmodel has some problems such as detail and overall model, multi-fastener joints and contact extrusionmodel. This paper proposes the modeling project of the simplified pin model and part of the overallwing model. For multi-fastener joints modeling problem, this paper respectively studies modelingmethods of the thin and thick plate connection, and proposes that the thick plate connection modelshould conside the influence of the bending stiffness and the plate-nail interface. For the contactproblem, the paper proposes to use the one-dimensional GAP elements to simulate the contactextrusion.The paper analyses the different influence to the load of the fasteners that caused by the variousfinite element method, boundary constraints and different modeling schemes, and established anonlinear method in the application of the fitting analys is. Simultaneously, the paper carried out astrength analysis, and developed a method of the strength check.The paper discusses a topological optimization method to optimize the riveted joint. It take amethod that gives the reference area of each rivet, increases the number of rivet in this area, and treatsall rivet elements as the optimize design space and then applys the topology optimization. Finally,according to the results of the optimization, the paper rearranges the rivet distribution.