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1、JournalofBionicEngineering6(2009)224–231UseofaDigitalImageCorrelationTechniqueforMeasuringtheMaterialPropertiesofBeetleWingTailieJin,NamSeoGoo,Sung-ChoongWoo,HoonCheolParkBiomemiticsandIntelligentMicrosystemLaboratory,DepartmentofAdvancedTechnologyFusion,KonkukUni
2、versity,Seoul143-701,RepublicofKoreaAbstractBeetlewingsareveryspecializedflightorgansconsistingoftheveinsandmembranes.Thereforeitisnecessaryfromabionicviewtoinvestigatethematerialpropertiesofabeetlewingexperimentally.Inthepresentstudy,wehaveusedaDigitalImageCorrel
3、ation(DIC)techniquetomeasuretheelasticmodulusofabeetlewingmembrane.Specimenswerepreparedbycarefullycuttingabeetlehindwinginto3.0mmby7.0mmsegments(thegagelengthwas5mm).Weusedascanningelectronmicroscopeforaprecisemeasurementofthethicknessofthebeetlewingmembrane.Thes
4、pecimenwasattachedtoadesignedTMfixturetoinduceauniformdisplacementbymeansofamicromanipulator.WeusedanARAMISsystembasedonthedigitalimagecorrelationtechniquetomeasurethecorrespondingdisplacementofaspecimen.Thethicknessofthebeetlewingvariedatdifferentpointsofthemembr
5、ane.Theelasticmodulusdifferedinrelationtothemembranearrangementshowingastructuralanisotropy;theelasticmodulusinthechordwisedirectionisapproximately2.65GPa,whichisthreetimeslargerthantheelasticmodulusinthespanwisedirectionof0.84GPa.Asaresult,thedigitalimagecorrelat
6、ion–basedARAMISsystemwassuc-cessfullyusedtomeasuretheelasticmodulusofabeetlewing.Inadditiontomembrane’selasticmodulus,weconsideredthePoisson’sratioofthemembraneandmeasuredtheelasticmodulusofaveinusinganInstronuniversaltensilemachine.TheresultrevealsthePoisson’srat
7、ioisnearlyzeroandtheelasticmodulusofaveinisabout11GPa.Keywords:digitalimagecorrelationtechnique,beetlewing,elasticmodulus,Poisson’sratio,vein,membraneCopyright©2009,JilinUniversity.PublishedbySciencePressandElsevierLimited.Allrightsreserved.doi:10.1016/S1672-6529(
8、08)60105-5meansofafluid-structureinteraction.Wainwrightre-1IntroductionportedthattheYoung’smodulusofawingcuticleap-Ingeneral,insectwingsconsistofaskelet
