Dynamic Failure of Composite and Sandwich Structures_part10

Dynamic Failure of Composite and Sandwich Structures_part10

ID:39911155

大小:4.75 MB

页数:63页

时间:2019-07-14

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1、DiscreteModelingoftheCrushingofNomexHoneycombCoreandApplicationtoImpactandPost-impactBehaviorofSandwichStructuresBrunoCastanie,YulfianAminanda,Jean-JacquesBarrau,´andPascalThevenetAbstractInthischapter,anoriginalmethodformodelingthebehaviorofsandwichstructuresduringandafterimpa

2、ctisproposedandvalidated.ItisbasedonthedemonstrationthatNomexhoneycombbehavesinapost-bucklingmodeveryearlyandthatcompressionforcesaretakenupbythecornersorverticaledgesofthehoneycombcellsinthesamewayastheyareinthestiffenersinaircraftstructures.Thusitispossibletorepresentthehone

3、ycombdiscretelybyagridofspringslocatedatthesixcornersofhexagonalcells.Thisapproachrepresentsthephenomenonofindentationonhoneycombaloneoronsandwichesverywell.Thisapproachprovidesanunderstandingofhowthesandwichandthecorebehaveundercompressionafterimpact.Anoriginalcriterionbasedo

4、nalocalcorecrushistestedandvalidatedtocomputetheresidualstrength.Toconsiderthebendingresponseofsandwichstructures,amulti-levelapproachisalsoproposed.KeywordsImpactSandwichCompressionafterimpact1IntroductionInthisfirstsection,thegeneralcontextofthestudywillbepresentedfirst,follow

5、edbyabriefliteraturesurvey.Finally,thescopeofthestudywillbeexplained.B.Castanie(´)J.-J.BarrauINSA,ISAE,Mines-Albi,UPS;ICA(InstitutClementAder),Universit´edeToulouse,´135AvenuedeRangueil,31077Toulouse,Francee-mail:bruno.castanie@insa-toulouse.frY.AminandaMechanicalEngineeringD

6、epartment,IIUM,Jl.Gombak,P.O.Box10,50728KualaLumpur,MalaysiaP.ThevenetEADSInnovationWorks,12ruePasteur,BP76,92152SuresnesCedex,FranceS.Abrateetal.(eds.),DynamicFailureofCompositeandSandwichStructures,427SolidMechanicsandItsApplications192,DOI10.1007/978-94-007-5329-710,©Spring

7、erScienceCBusinessMediaDordrecht2013428B.Castanieetal.´1.1BackgroundSandwichstructuresconsistoftwoskins,havinghighmechanicalproperties,andalightweightcore,whichseparatestheskins.Thequalityoftheskins-coreassemblyisintrinsicallylinkedtothemechanicalcharacteristicsofthecore.Whent

8、hethicknessofthecoreisincreased,thebendingstiffnessandcritica

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