Designation:D3983−98(Reapproved2011)StandardTestMethodforMeasuringStrengthandShearModulusofNonrigidAdhesivesbytheThick-AdherendTensile-LapSpecimen1ThisstandardisissuedunderthefixeddesignationD3983;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethoddescribesamethodofmeasuringtheshearmodulusandrupturestressinshearofadhesivesinbondedjoints.Themethodemployslap-shearspecimenswithwood,metal,orcompositeadherends,withadhesiveshavingshearmodulirangingupto700MPa(100000psi).Thistestmethodissuitablegenerallyforjointsinwhichtheratioofadherendtensilemodulustoadhesiveshearmodulusisgreaterthan300to1.Itisnotsuitableforadhesivesthathaveahighshearmodulusinthecuredstateandthatalsorequireelimina-tionofvolatileconstituentsduringcure.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2D143TestMethodsforSmallClearSpecimensofTimberD905TestMethodforStrengthPropertiesofAdhesiveBondsinShearbyCompressionLoadingD907TerminologyofAdhesivesD1151PracticeforEffectofMoistureandTemperatureonAdhesiveBondsD2651GuideforPreparationofMetalSurfacesforAdhesiveBondingE6TerminologyRelatingtoMethodsofMechanicalTestingE83PracticeforVerificationandClassificationofExten-someterSystemsE104PracticeforMaintainingConstantRelativeHumiditybyMeansofAqueousSolutionsE229TestMethodforShearStrengthandShearModulusofStructuralAdhesives(Withdrawn2003)33.Terminology3.1Definitions:3.1.1Fordefinitionsoftermsusedinthistestmethod,refertoTerminologiesE6andD907.3.1.2initialtangentm...
