Design Method Of Bionic Thin Solid Film Inspired From Dragonfly Wings

Dragonfly wings are composed of veins and membranes. With the excellentperformance of ultra~lightweight, high strength, adaptive deformation, they adapt tothe flight environment very well. Because of their adoptability, they have become thefrontiers research of science and technology. Completing their specific functions withthe minimum quality of materials and adequate safety factors, the optimizing structureof dragonfly wings is not only the natural choice, but also the need of the project.Therefore, not only for bionics and its application, but in the study of biology itself,the study of dragonfly wings structure and its excellent performance is verymeaningful.The study object is wings of dragonfly, Pantala flavescens Fabricius, in thisthesis. The microscopic analysis of the combination structure of dragonfly wingsmembrane and veins were made. By reverse engineering techniques, thethree-dimensional geometric reconstruction model was established. Coupled withnano-mechanical of wings, with two-node pipe unit, Pipe20, simulating veins andfour-node shell element, Shell43, wing membrane, the topology optimization on thedragonfly wing model, the micro-structural coupled model was developed. With thefinite element analysis software (ANSYS), the loading analysis in dragonfly wingsmodels were performed. With the application of SIMP method were made and thestructure models had been taken out different proportions. Choice of several inANSYS topology optimization unit type were compared. The dragonfly wingstructure was replaced by SOLID95. The obtained optimized geometries unit wasreorganized. By compared, analyzed and re-combinated design on an applied finiteelement static load of four kinds topology optimization of hindwings, andComparative analysed with the three existing biomimetic structure model, we foundthat the mechanical properties of the multi-unit structure model was significantlybetter than the less cell structure model. Based on the structure to design the bionicthin solid membrane, this thesis offers a basic method for designing bionic thin solidmembrane.