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1、Designation:D950?03(Reapproved2011)StardTestMethodfImpactStrengthofAdhesiveBonds1ThisstardisissuedunderthefixeddesignationD950thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladoptioninthecaseofrevision
2、theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.ThisstardhasbeenapprovedfusebyagenciesoftheU.S.DepartmentofDefense.INTRODUC
3、TIONTheaccuracyoftheresultsofstrengthtestsofadhesivebondswilldependontheconditionsunderwhichthebondingprocessiscarriedout.Unlessotherwiseagreeduponbetweenthemanufacturerthepurchaserthebondingconditionsshallbeprescribedby
4、themanufactureroftheadhesive.Indertoensurethatcompleteinfmationisavailabletotheindividualconductingtheteststhemanufactureroftheadhesiveshallfurnishnumericalvaluesotherspecificinfmationfeachofthefollowingvariables:(1)Proc
5、edurefpreparationofsurfacespritoapplicationoftheadhesivethecleaningdryingofmetalsurfacesspecialsurfacetreatmentssuchassingwhicharenotspecificallylimitedbythepertinenttestmethod.(2)Completemixingdirectionsftheadhesive.(3)
6、Conditionsfapplicationoftheadhesiveincludingtherateofspreadthicknessoffilmnumberofcoatstobeappliedwhethertobeappliedtoonebothsurfacestheconditionsofdryingwheremethanonecoatisrequired.(4)Assemblyconditionsbefeapplicationo
7、fpressureincludingtheroomtemperaturelengthoftimewhetheropenclosedassemblyistobeused.(5)Curingconditionsincludingtheamountofpressuretobeappliedthelengthoftimeunderpressurethetemperatureoftheassemblywhenunderpressure.Itsho
8、uldbestatedwhetherthistemperatureisthatofthebondlineoftheatmosphereatwhichtheassemblyistobemaintained.(6)Conditioningprocedurebefetestingunlessastardprocedureisspecifiedincludingthelengthoftimetemperaturerelativehuity.Ar
9、angemaybeprescribedfanyvariablebythemanufactureroftheadhesiveifitcanbeassumedbythetestoperatthatanyarbitrarilychosenvaluewithinsucharangeanycombinationofsuchvaluesfseveralvariableswillbeacceptabletoboththemanufacturerthe
10、purchaseroftheadhesive.1.Scope1.1Thistestmethodcoversthedeterminationofthecomparativeimpactstrengthofadhesivebondsinshearwhentestedonstardspecimensunderspecifiedconditionsofpreparationconditioningtesting.1.2Thevaluesstat
11、edinSIunitsaretoberegardedasthestard.Thevaluesinparenthesesarefinfmationonly.1.3Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriat
12、esafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:2A108SpecificationfSteelBarCarbonAlloyColdFinishedB16B16MSpecificationfFreeCuttingBrassRodBarShapesfUseinScr
13、ewMachines1ThistestmethodisunderthejurisdictionofASTMCommitteeD14onAdhesivesisthedirectresponsibilityofSubcommitteeD14.80onMetalBondingAdhesives.CurrenteditionapprovedApril12011.PublishedApril2011.iginallyapprovedin1952.
14、Lastpreviouseditionapprovedin2003asD950–03.DOI:10.1520D095003R11.2FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageo
15、ntheASTMwebsite.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates16.1.4Conditioning—Preconditioningisnotrequiredfmetaltometalbonds.Theadhesiveisreadyftestpurposeswhenithasbeenap
16、pliedinaccdancewith6.1.3unlessotherwisespecifiedbythemanufacturerthepurchaser.6.1.5NumberofTestSpecimensMetaltoMetal:6.1.5.1Testtentestspecimensfeachadhesiveinthecaseofmetaltometalspecimens.6.1.5.2Discardspecimensthatbre
17、akataflawremotefromthebondline.Retestunlesssuchflawsconstituteavariabletheeffectofwhichitisdesiredtostudy.7.TestingProcedure7.1Placethespecimeninthejigintheviseoftheimpactmachinesothatthespecimenbuttssquarelyagainstthere
18、tainingendofthejig.Resttheimpactheadofthemachinegentlyagainstthespecimenadjustthejigsothattheheadfitssquarelyagainsttheimpactfaceofthespecimen.7.2Raisetheimpactheadtoapredeterminedheightreleasethesafetycatch.Theimpactene
19、rgyabsbedbythespecimenmaythenbereaddirectly.7.3Recdthefollowinginfmation:7.3.1Recdjoulesfootpoundfceofenergyabsbedinproducingfailureofthespecimen.7.3.2Recdbondedareaofspecimen.FIG.1AdapterJigfImpactMachinesD950?03(2011)3
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