ASTM D7332/D7332M-2009 测量纤维增强聚合物基复合材料紧固件全程拉动阻力的标准试验方法

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【英文标准名称】:StandardTestMethodforMeasuringtheFastenerPull-ThroughResistanceofaFiber-ReinforcedPolymerMatrixComposite
【原文标准名称】:测量纤维增强聚合物基复合材料紧固件全程拉动阻力的标准试验方法
【标准号】:ASTMD7332/D7332M-2009
【标准状态】:现行
【国别】:
【发布日期】:2009
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:D30.05
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:boltedjoints;compositematerials;fastener;fastenerpull-through;out-of-planeloading;Compositematerials;Fastenerpull-throughresistance;Fiberreinforcedpolymers;Polymermatrixcompositematerials
【摘要】:Thistestmethodisdesignedtoproducefastenerpull-throughresistancedataforstructuraldesignallowables,researchanddevelopment.Theproceduresmaybeusedtoassesspull-throughresistanceforavarietyofcompositelaminatethicknesses,fastenerdiameters,andfastenerheadstyles.However,theflexibilityoftestparametersallowedbythevariantsmakesmeaningfulcomparisonbetweendatasetsdifficultifthedatasetswerenotgeneratedusingidenticaltestparameters.Earlycompositepull-throughtestsusingfastenerscommontometalstructuresledtoprematurejointfailures,andresultedinthedevelopmentoffastenersspecificforcompositeapplications.Thesefastenershavelargerheadsandtailstoreducethrough-thicknesscompressionstressesonthecompositelaminate.Generalfactorsthatinfluencethemechanicalresponseofcompositelaminatesandshouldthereforebereportedincludethefollowing:material,methodsofmaterialpreparationandlay-up,specimenstackingsequence,specimenpreparation,specimenconditioning,environmentoftesting,specimenalignment,speedoftesting,timeattemperature,voidcontent,andvolumepercentreinforcement.Specificfactorsthatinfluencethepull-throughresistanceofcompositelaminatesandshouldthereforebereportedincludethefollowing:holediameter,fastenerdiameter,fastenerheaddiameter,loadingbarspacingtofastenerholediameterratio(ProcedureA),clearanceholediametertofastenerholediameterratio(ProcedureB),diametertothicknessratio,fastenertorque,fastenerorpinmaterial,fastenerorpinclearance,countersinkangleanddepthofcountersink,typeofgrommet(ifused),andtypeofsupportfixture.Fastenerpull-throughresistancepropertieswhichmaybedeterminedfromthistestmethodincludeinitialsub-criticalfailureforce/displacement,failureforce,maximumforce,andrupturedisplacement.1.1Thistestmethoddeterminesthefastenerpull-throughresistanceofmultidirectionalpolymermatrixcompositesreinforcedbyhigh-modulusfibers.Fastenerpull-throughresistanceischaracterizedbytheforce-versus-displacementresponseexhibitedwhenamechanicalfastenerispulledthroughacompositeplate,withtheforceappliedperpendiculartotheplaneoftheplate.Thecompositematerialformsarelimitedtocontinuous-fiberordiscontinuous-fiber(tapeorfabric,orboth)reinforcedcompositesforwhichthelaminateissymmetricandbalancedwithrespecttothetestdirection.Therangeofacceptabletestlaminatesandthicknessesisdefinedin8.2.1.2Twotestproceduresandconfigurationsareprovided.Thefirst,ProcedureA,issuitableforscreeningandfastenerdevelopmentpurposes.Thesecond,ProcedureB,isconfiguration-dependentandissuitableforestablishingdesignvalues.Bothprocedurescanbeusedtoperformcomparativeevaluationsofcandidatefasteners/fastenersystemdesigns.1.3Thespecimensdescribedhereinmaynotberepresentativeofactualjointswhichmaycontainoneormorefreeedgesadjacenttothefastener,ormaycontainmultiplefastenersthatcanchangetheactualboundaryconditions.1.4ThistestmethodisconsistentwiththerecommendationsofCMH-17,whichdescribesthedesirableattributesofafastenerpull-throughtestmethod.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetexttheinch-poundunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibi......
【中国标准分类号】:
【国际标准分类号】:83_120
【页数】:12P.;A4
【正文语种】: