Designation:C273/C273M−16StandardTestMethodforShearPropertiesofSandwichCoreMaterials1ThisstandardisissuedunderthefixeddesignationC273/C273M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationofshearpropertiesofsandwichconstructioncorematerialsassociatedwithsheardistortionofplanesparalleltothefacings.Itcoversthedeterminationofshearstrengthparalleltotheplaneofthesandwich,andtheshearmodulusassociatedwithstrainsinaplanenormaltothefacings.Thetestmaybeconductedoncorematerialsbondeddirectlytotheloadingplatesorthesandwichfacingsbondedtotheplates.Permissiblecorematerialformsincludethosewithcontinuousbondingsurfaces(suchasbalsawoodandfoams)aswellasthosewithdiscontinuousbondingsurfaces(suchashoneycomb).1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.2.1Withinthetexttheinch-poundunitsareshowninbrackets.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C271/C271MTestMethodforDensityofSandwichCoreMaterialsC393TestMethodforFlexuralPropertiesofSandwichConstructionsD792TestMethodsforDensityandSpecificGravity(Rela-tiveDensity)ofPlasticsbyDisplacementD883TerminologyRelatingtoPlasticsD2584TestMethodforIgnitionLossofCuredReinforcedResinsD2734TestMethodsforVoidContentofReinforcedPlasticsD3171TestMethodsforConstituentConten...
