ASTMD-7205-Standard-Test-Method-for-Tensile-Proper

Designation:D7205/D7205M–06StandardTestMethodforTensilePropertiesofFiberReinforcedPolymerMatrixCompositeBars1ThisstandardisissuedunderthefixeddesignationD7205/D7205M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(e)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddeterminesthequasi-staticlongitudinaltensilestrengthandelongationpropertiesoffiberreinforcedpolymermatrix(FRP)compositebarscommonlyusedastensileelementsinreinforced,prestressed,orpost-tensionedconcrete.NOTE1—AdditionalproceduresfordeterminingtensilepropertiesofpolymermatrixcompositesmaybefoundintestmethodsD3039/D3039MandD3916.1.2LinearelementsusedforreinforcingPortlandcementconcretearereferredtoasbars,rebar,rods,ortendons,dependingonthespecificapplication.Thistestmethodisapplicabletoallsuchreinforcementswithinthelimitationsnotedinthemethod.Thetestarticlesarereferredtoasbarsinthistestmethod.Ingeneral,barshavesolidcross-sectionsandaregularpatternofsurfaceundulationsand/oracoatingofbondedparticlesthatpromotemechanicalinterlockbetweenthebarandconcrete.Thetestmethodisalsoappropriateforusewithlinearsegmentscutfromagrid.Specificdetailsforpreparingandtestingofbarsandgridsareprovided.Insomecases,anchorsmaybenecessarytopreventgrip-induceddamagetotheendsofthebarorgrid.RecommendeddetailsfortheanchorsareprovidedinAnnexA1.1.3Thestrengthvaluesprovidedbythismethodareshort-termstaticstrengthsthatdonotaccountforsustainedstaticorfatigueloading.Additionalmaterialcharacterizationmayberequired,especiallyforbarsthataretobeusedunderhighlevelsofsustainedorrepeatedloading.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyproblems,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.5ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Withinthetext,theinch-poundunitsareshowninbrackets.Thevaluesstatedineachsystemarenotexactequivalents;therefore,eachsystemmustbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnonconformancewiththestandard.2.ReferencedDocuments2.1ASTMStandards:2A615/A615MSpecificationforDeformedandPlainCarbon-SteelBarsforConcreteReinforcementD792TestMethodsforDensityandSpecificGravity(Rela-tiveDensity)ofPlasticsbyDisplacementD883TerminologyRelatingtoPlasticsD3039/D3039MTestMethodforTensilePropertiesofPolymerMatrixCompositeMaterialsD3171TestMethodsforConstituentContentofCompositeMaterialsD3878TerminologyforCompositeMaterialsD3916TestMethodforTensilePropertiesofPultrudedGlass-Fiber-ReinforcedPlasticRodD5229/D5229MTestMethodforMoistureAbsorptionPropertiesandEquilibriumConditioningofPolymerMa-trixCompositeMaterialsE4PracticesforForceVerificationofTestingMachinesE6TerminologyRelatingtoMethodsofMechanicalTest-ingE83PracticeforVerificationandClassificationofExten-someterSystemE122PracticeforCalculatingSampleSizetoEstimate,WithaSpecifiedTolerableError,theAverageforaCharacteristicofaLotorProcessE456TerminologyRelatingtoQualityandStatisticsE1012PracticeforVerificationofTestFrameandSpeci-menAlignmentUnderTensileandCompressiveAxialForceApplicationE1309GuideforIdentificationofFiber-ReinforcedPolymer-MatrixCompositeMaterialsinDatabasesE1434GuideforRecordingMechanicalTestDataofFiber-ReinforcedCompositeMaterialsinDatabasesE1471GuideforIdentificationofFibers,Fillers,andCore1ThistestmethodisunderthejurisidictionofASTMCommitteeD30onCompositeMaterialsandisthedirectresponsibilityofSubcommitteeD30.05onStructuralTestMethods.CurrenteditionapprovedMarch15,2006.PublishedApril2006.2ForreferencedASTMstandards,visittheASTMwebsite,@astm.org.ForAnnualBookofASTMStandardsvolumeinformation,refertothestandard’sDocumentSummarypageontheASTMwebsite.1Copyright©ASTMInternational,100BarrHarborDrive,POBoxC700,WestConshohocken,PA19428-2959,UnitedStates.CopyrightbyASTMInt'l(allrightsreserved);ThuSep712:49:06EDT2006ReproductionauthorizedperLicenseAgreementwithJimStull(HughesBrothers,Inc.);MaterialsinComputerizedMaterialPropertyDatabases3.Terminology3.1TerminologyinD3878definestermsrelatingtohigh-modulusfibersandtheircomposites.TerminologyinD883definestermsrelatingtoplastics.TerminologyinE6definestermsrelatingtomechanicaltesting.TerminologyinE456andinPracticeE122definetermsrelatingtostatisticsandtheselectionofsamplesizes.Intheeventofaconflictbetweenterms,TerminologyinD3878shallhaveprecedenceovertheotherterminologystandards.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1anchor,n—aprotectivedeviceplacedoneachendofabar,betweenthebarandthegripsofthetensiletestingmachine,topreventgrip-induceddamage.Usuallyusedonbarswithirregularsurfaces,asopposedtoflatstripswherebondedtabsaremoretypical.3.2.2bar,n—alinearelement,oftenwithsurfaceundula-tionsoracoatingofparticlesthatpromotemechanicalinter-lockwithconcrete3.2.3grid,n—atwo-di