资源描述：
《Dynamic Failure of Composite and Sandwich Structures_part1.pdf》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。
1、HydroelasticImpactsofDeformableWedgesRiccardoPanciroliAbstractThisworkinvestigatestheslammingphenomenonexperiencedduringthewaterentryofdeformablebodies.Wedgesarechosenasreferencegeometryduetotheirsimilaritytoagenerichullsection.Hullslammingoccurswhenash
2、ipre-entersthewaterafterhavingbeenpartiallyorcompletelyliftedoutthewater.Therearethreemorecasescommonlydefinedasslammingphenomena:bow-flare,wet-deckandgreenwaterslamming.Theseareallspecialcasesofthegeneraltopicofwaterentryofabody.Whiletheanalysisofrigidst
3、ructuresenteringthewaterhasbeenextensivelystudiedinthepastandthereareanalyticalsolutionscapableofcorrectlypredictingthehydrodynamicpressuredistributionandtheoverallimpactdynamics,theeffectofthestructuraldeformationontheoverallimpactforceisstillachalleng
4、ingproblemtobesolved.Infact,incaseofwaterimpactofdeformablebodies,thedynamicdeflectioncouldinteractwiththefluidflow,affectingthehydrodynamicload.Thisworkinvestigatesthehull-slammingproblembyexperimentsandnumericalsimulationsofthewaterentryofelasticwedgesim
5、pactingonaninitiallycalmsurfacewithpureverticalvelocity.Theobjectiveistodetermineanaccuratemodeltopredicttheoveralldynamicsofthewedgeanditsdeformations.Morethan1,200experimentswereconductedbyvaryingwedgestructuralstiffness,deadriseangle,impactvelocityan
6、dmass.Oninterestaretheoverallimpactdynamicsandthelocalstructuraldeformationofthepanelscomposingthewedge.Alongsidewiththeexperimentalanalysis,numericalsimulationsbasedonacoupledSmoothedParticleHydrodynamics(SPH)andFEMmethodaredeveloped.Rangesofapplicabil
7、ityofasimplifiedmodelneglectingtheairarefound.Theresultsprovideevidenceofthemutualinteractionbetweenhydrodynamicloadandstructuraldeformation.ItisfoundasimplecriterionforR.Panciroli()AlmaMaterStudiorum,UniversitadiBologna,VialedelRisorgimento2,40136,Bolo
8、gna,Italy`e-mail:riccardo.panciroli@unibo.itS.Abrateetal.(eds.),DynamicFailureofCompositeandSandwichStructures,1SolidMechanicsandItsApplications192,DOI10.1007/978-94-007-5329-71,©SpringerScienceCBusinessMediaDordrecht20132R.Panci
