Modeling the Effect of Damage in Composite Structures: Simplified Approaches PDF
Preview Modeling the Effect of Damage in Composite Structures: Simplified Approaches
MODELING THE EFFECT OF DAMAGE IN COMPOSITE STRUCTURES Aerospace Series List ModelingtheEffectofDamageinCompositeStructures:Simplified Kassapoglou March2015 Approaches IntroductiontoAircraftAeroelasticityandLoads,2ndEdition WrightandCooper December2014 AircraftAerodynamicDesign:GeometryandOptimization SóbesterandForrester October2014 TheoreticalandComputationalAerodynamics Sengupta September2014 AerospacePropulsion Lee October2013 AircraftFlightDynamicsandControl Durham August2013 CivilAvionicsSystems,2ndEdition Moir,SeabridgeandJukes August2013 ModellingandManagingAirportPerformance Zografos,Andreattaand July2013 Odoni AdvancedAircraftDesign:ConceptualDesign,Analysisand Torenbeek June2013 OptimizationofSubsonicCivilAirplanes DesignandAnalysisofCompositeStructures:WithApplicationsto Kassapoglou April2013 AerospaceStructures,2ndEdition AircraftSystemsIntegrationofAir-LaunchedWeapons Rigby April2013 DesignandDevelopmentofAircraftSystems,2ndEdition MoirandSeabridge November2012 UnderstandingAerodynamics:ArguingfromtheRealPhysics McLean November2012 AircraftDesign:ASystemsEngineeringApproach Sadraey October2012 IntroductiontoUAVSystems4e FahlstromandGleason August2012 TheoryofLift:IntroductoryComputationalAerodynamicswith McBain August2012 MATLABandOctave SenseandAvoidinUAS:ResearchandApplications Angelov April2012 MorphingAerospaceVehiclesandStructures Valasek April2012 GasTurbinePropulsionSystems MacIsaacandLangton July2011 BasicHelicopterAerodynamics,3rdEdition SeddonandNewman July2011 AdvancedControlofAircraft,SpacecraftandRockets Tewari July2011 CooperativePathPlanningofUnmannedAerialVehicles Tsourdosetal November2010 PrinciplesofFlightforPilots Swatton October2010 AirTravelandHealth:ASystemsPerspective Seabridgeetal September2010 DesignandAnalysisofCompositeStructures:Withapplicationsto Kassapoglou September2010 aerospaceStructures UnmannedAircraftSystems:UAVSDesign,Developmentand Austin April2010 Deployment IntroductiontoAntennaPlacement&Installations Macnamara April2010 PrinciplesofFlightSimulation Allerton October2009 AircraftFuelSystems Langtonetal May2009 TheGlobalAirlineIndustry Belobaba April2009 ComputationalModellingandSimulationofAircraftandthe Diston April2009 Environment:Volume1-PlatformKinematicsandSynthetic Environment HandbookofSpaceTechnology Ley,WittmannHallmann April2009 AircraftPerformanceTheoryandPracticeforPilots Swatton August2008 AircraftSystems,3rdEdition Moir&Seabridge March2008 IntroductiontoAircraftAeroelasticityAndLoads Wright&Cooper December2007 StabilityandControlofAircraftSystems Langton September2006 MilitaryAvionicsSystems Moir&Seabridge February2006 DesignandDevelopmentofAircraftSystems Moir&Seabridge June2004 AircraftLoadingandStructuralLayout Howe May2004 AircraftDisplaySystems Jukes December2003 CivilAvionicsSystems Moir&Seabridge December2002 MODELING THE EFFECT OF DAMAGE IN COMPOSITE STRUCTURES SIMPLIFIED APPROACHES Christos Kassapoglou DelftUniversityofTechnology,TheNetherlands Thiseditionfirstpublished2015 ©2015JohnWiley&SonsLtd Registeredoffice JohnWiley&SonsLtd,TheAtrium,SouthernGate,Chichester,WestSussex,PO198SQ,United Kingdom Fordetailsofourglobaleditorialoffices,forcustomerservicesandforinformationabouthowtoapply forpermissiontoreusethecopyrightmaterialinthisbookpleaseseeourwebsiteatwww.wiley.com. 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ISBN:9781119013211 Typesetin11/13ptTimesLTStdbyLaserwordsPrivateLimited,Chennai,India 1 2015 Contents SeriesPreface ix Preface xi 1 DamageinCompositeStructures:NotchSensitivity 1 1.1 Introduction 1 1.2 NotchInsensitivity 2 1.3 ‘Complete’NotchSensitivity 4 1.4 NotchSensitivityofCompositeMaterials 5 Exercises 6 References 7 2 Holes 9 2.1 StressesaroundHoles 13 2.2 UsingtheAnisotropicElasticitySolutiontoPredictFailure 16 2.3 TheRoleoftheDamageZoneCreatedNearaHole 17 2.4 SimplifiedApproachestoPredictFailureinLaminateswithHoles:the Whitney–NuismerCriteria 19 2.5 OtherApproachestoPredictFailureofaLaminatewithaHole 24 2.6 ImprovedWhitney–NuismerApproach 25 2.7 Application:FindingtheStackingSequenceWhichResultsinGood OHTPerformance 34 Exercises 35 References 39 3 Cracks 41 3.1 Introduction 41 3.2 ModellingaCrackinaCompositeLaminate 42 3.3 Finite-WidthEffects 45 3.4 OtherApproachesforAnalysisofCracksinComposites 46 3.5 MatrixCracks 49 Exercises 52 References 56 vi Contents 4 Delaminations 57 4.1 Introduction 57 4.2 RelationtoInspectionMethodsandCriteria 60 4.3 ModellingDifferentStructuralDetailsinthePresenceofDelaminations 63 4.3.1 BucklingofaThrough-WidthDelaminatingLayer 63 4.3.2 BucklingofanEllipticalDelaminatingLayer 69 4.3.3 Application–BucklingofanEllipticalDelaminationunder CombinedLoads 73 4.3.4 OnsetofDelaminationataStraightFreeEdgeofaComposite Laminate 75 4.3.5 DelaminationataFlange–StiffenerInterfaceofaComposite StiffenedPanel 84 4.3.6 DoubleCantileverBeamandEndNotchFlexureSpecimen 88 4.3.7 TheCrackClosureMethod 92 4.4 StrengthofMaterialsVersusFractureMechanics–UseofCohesive Elements 96 4.4.1 UseofCohesiveElements 99 Exercises 100 References 103 5 Impact 105 5.1 SourcesofImpactandGeneralImplicationsforDesign 105 5.2 DamageResistanceVersusDamageTolerance 109 5.3 ModellingImpactDamageasaHole 111 5.4 ModellingImpactDamageasaDelamination 114 5.5 ImpactDamageModelledasaRegionofReducedStiffness 117 5.6 Application:ComparisonofthePredictionsoftheSimplerModelswith TestResults 121 5.6.1 ModellingBVIDasaHole 122 5.6.2 ModellingBVIDasaSingleDelamination 123 5.6.3 ModellingBVIDasanEllipticalInclusionofReducedStiffness 124 5.6.4 ComparisonsofAnalyticalPredictionstoTest Results–SandwichLaminates 124 5.7 ImprovedModelforImpactDamageAnalysedasaRegionofReduced Stiffness 125 5.7.1 TypeandExtentofDamageforGivenImpactEnergy 125 5.7.2 ModelforPredictingCAIStrength 148 Exercises 163 References 168 6 FatigueLifeofCompositeStructures:AnalyticalModels 171 6.1 Introduction 171 6.2 NeededCharacteristicsforanAnalyticalModel 175 Contents vii 6.3 ModelsfortheDegradationoftheResidualStrength 177 6.3.1 LinearModel 177 6.3.2 NonlinearModel 180 6.4 ModelfortheCyclestoFailure 183 6.4.1 ExtensiontoSpectrumLoading 196 6.5 ResidualStrengthandWear-OutModelPredictionsComparedtoTest Results 200 6.5.1 ResidualStrengthPredictionsComparedtoTestResults 200 6.5.2 CyclestoFailurePredictionsComparedtoTestResults (ConstantAmplitude) 202 6.5.3 CyclestoFailurePredictionsComparedtoTestResults (SpectrumLoading) 204 6.6 AProposalfortheCompleteModel:AccountingforLargerScale Damage 206 6.6.1 FirstCycle,TensionPortion 207 6.6.2 FirstCycle,CompressionPortion 207 6.6.3 SubsequentLoadCycles 208 6.6.4 Discussion 208 6.6.5 Application:Tension–CompressionFatigueofUnidirectional Composites 209 6.6.6 Application:Tension–TensionFatigueofCross-PlyLaminates 214 Exercises 218 References 219 7 EffectofDamageinCompositeStructures:SummaryandUseful DesignGuidelines 221 Index 227
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