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摘要内容: HolisticLifeAssessmentMethods CanadianAeronauticsandSpaceInstitute50thAGMandConference 16thAerospaceStructuresandMaterialsSymposium Montréal28-30April2003 KyleHoneycutt,CraigBrooks,ScottProst-DomaskyandThomasMills APES,Inc. AnalyticalProcesses/EngineeredSolutions•6669FylerAve.St.Louis,MO63139 Abstract Holisticassessmentsrepresentamethodofincorporatingallphasesofstructurallife intoasingleframework."Safe-life"and"DamageTolerance"designconceptsdonot becomeobsoletebytheHolisticLifeAssessmentMethod(HLAM),rather,theyarea subsetofHLAMandalwayscaneitherbeusedasabaselineanalysis,orbetailoredto meetindividualcustomerneeds. Thepowerofholisticassessmentisthattheanalystcancapturetheadditionalphases ofstructurallifeinappropriatestructurallocations.Itsfundamentalengineeringbasis allowsholisticassessmentstobesupplemented,benchmarked,andcorrelatedwith manufacturedstatesandwithNDImethods.Duringcorrelationofassessmentsand testorfielddata,itisimperativethatrules,procedures,andinconsistenciesbefully documented.TheultimategoalofHLAMistohaveasetof“freely-available”rules (withengineeringfundamentalsasthebasis)suchthatsmoothcoupons,notched coupons,components,fielddata,andfull-scaletestresultscanbepredictable, includingtheiranticipatedstatisticalvariations. UsingthefundamentalsoftheInitialDiscontinuityState(IDS),concurrentfatigueand agedegradationinteractionsthatcausediscontinuityprogressions,andemerging conceptsinfailurescenarios,HLAMcanimproveuponsafety,fleetreadiness,and maintenancecostmanagement.TheHLAMconceptenablesassessmentsofstructural systemsregardlessoftheirmaintenancephilosophy.UsersoftheHLPMframework candeveloptheirownspecificallytailoredassessmentfromaholisticassessment, baseduponindividualcriteriaandrequirements.