1、南京航空航天大學碩士學位論文甲蟲鞘翅力學性能及其微結(jié)構(gòu)研究姓名：竇君智申請學位級別：碩士專業(yè)：機械設計及理論指導教師：郭策201103甲蟲鞘翅力學性能及其微結(jié)構(gòu)研究iiABSTRACTInthisdissertationmphologicalonbothsurfacesectionmechanicalpropertiesthreedimensionalreconstructionofelytrafromCybistertripuncta

2、tuswereinvestigated.Regardingmphologicalstructureobservationindicatesthattheelytrahadanonsmoothexternalsurfacewherearrayedmanylongitudinalfurrowsthewidthoffurrowisabout50m.Manyblackholeswhicharetwistedbywhitefibrelayersb

3、estrewonelytra’sinternalsurfacethesamestructureisfoundonthesurfacewithoutepicuticle.Therearecavitieshollowpillarsonelytra’ssectionthosearefmedfrommanyfibrelayerstwistedwitheachotherinparallelwaypositivenegativewayhelical

4、way.Researchshowsthatblackholeshollowpillarsarethesamestructure.ThemechanicalpropertiesofelytrawithoutepicuticlesectionsofCybister’selytrawerestudied.ThehardnesselasticmodulusofelytrawithoutepicuticlewereobtainedfromtheN

5、anoindenterteststhevaluesare0.065GPa0.007GPa0.704GPa0.013GPawhicharemuchsmallerthanthevaluesofelytrawithepicuticle.Themechanicalpropertiesofelytrasectionsfollowsomerules:onthetransversesectionthehardnesselasticmodulusint

6、hecouplingzoneareslightlylargerthanthoseinthecentralouterzoneonthelongitudeinalsectionthehardnesselasticmodulusinthecentralzoneareapparentlylargerthanthoseinthecephalosomeempennagezone.Tomakethreedimensionalreconstructio

7、nofcavitypillarstructureunitofelytrausingparaffinsections3DDOCTsoftwareaswellastoobserveanalyzethereconstructedstructure.Toresearchthedistributionofcavitiesinelytragainserialsectionimagesafterpolishingreconstructcavitymo

8、del.ModelinginUGsoftwarebaseonreconstructedmodelsaswellastocontrastitwithparaffinsectionsSEMimagesresultshowsthatthestructureofelytraisjustlikethereconstructedmodel.Keywds:BiomimeticsElytraCybistertripunctatusMphological