GMN 6538TP-2003 Outer Body Panel Assemblies (Off Body)-Dent Oil Canning Fracture

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1、NorthAmericanTestProcedureENGINEERINGGMN6538TP(Book)STANDARDSOuterBodyPanelAssemblies(OffBody)-Dent/OilCanning/Fracturelocalizedatthepointofloading,whichisnot1Introductiontheintentoftheproductdesign.Note:Nothinginthisproceduresupercedes1.4.3DentResistance(InitialStiffness)-Theapplicablelawsandregula

2、tionsunlessaabilityofapaneltowithstanddenting.Thisisspecificexemptionhasbeenobtained.measuredasdescribedunder“Stiffness,Note:IfthereisaconflictbetweentheEnglishInitial”.anddomesticlanguage,theEnglishlanguageshalltakeprecedence.1.4.4FirstVisibleDent-Thesmallest,permanentdeformation/fracturethatcanbed

3、etectedbytheunaidedhumaneye.The1.1Purpose.abilityofapaneltowithstandaspecifiedloadwithoutfracturing.AcrackmaybeperceivedTodetermineany"offbody",outerpanel’sdentthroughsightorsound.Anaudibleperceivedresistance(initialstiffness),oilcanning,andthecrackwillrequirefurtherinspectiontominimumstaticforcereq

4、uiredtoproduceadeterminelocationandanyactualeffectonthevisibledentoranaudible/visiblefracture.outerpanel.1.2Foreword.1.4.5OilCanning-Recoverable,localizedNote:Thistestprocedureisstillbeingreversalofpanelcurvature,whichmaybedeveloped.Thisdraftversionmaycontainaccompaniedwithaudiblesound.detailsorgene

5、ralitiesthatneedfurtherresearchandresolution.Revisionstothistestprocedurewillbemadeasnecessary.1.4.6OilCanningLoad-Loadatwhichtheloadvs.deflectioncurvechangesfromlinearto1.3Applicability.non-linear(seeGraph1)butwherethedeflectionisfullyrecoverable(nosetoccurs).Thisprocedureappliestopanelsandpanelass

6、embliesforallpassengercars,lightduty,andmediumdutytrucks.1.4.7OilCanningHard-Thetypeofoilcanningthatoccurswhenthepanelcurvaturereversesataspeedfasterthanthatatwhichtheindenteristraveling.Asaresult,thepanel1.4Definitions.andtheindenteraretemporarilynotinclose1.4.1AngleofAttack-Referstotheangularconta

7、ct,andthereforeadropinappliedloadisorientationoftheindenterina3-Dimensionalobserved.Theslopebecomesnegative.(Seespace.(Seefigure1a).TheprimaryreferenceGraph1)fortheangularorientationuses“vertical”asze