Designation:D7249/D7249M−12´1StandardTestMethodforFacingPropertiesofSandwichConstructionsbyLongBeamFlexure1ThisstandardisissuedunderthefixeddesignationD7249/D7249M;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—Figure6wascorrectededitoriallyinMarch2014.1.Scope1.1Thistestmethodcoversdeterminationoffacingprop-ertiesofflatsandwichconstructionssubjectedtoflexureinsuchamannerthattheappliedmomentsproducecurvatureofthesandwichfacingplanesandresultincompressiveandtensileforcesinthefacings.Permissiblecorematerialformsincludethosewithcontinuousbondingsurfaces(suchasbalsawoodandfoams)aswellasthosewithdiscontinuousbondingsurfaces(suchashoneycomb).1.2ThevaluesstatedineitherSIunitsorinch-poundunitsaretoberegardedseparatelyasstandard.Thevaluesstatedineachsystemmaynotbeexactequivalents;therefore,eachsystemshallbeusedindependentlyoftheother.Combiningvaluesfromthetwosystemsmayresultinnon-conformancewiththestandard.1.2.1Withinthetext,theinch-poundunitsareshowninbrackets.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.NOTE1—AlternateproceduresfordeterminingthecompressivestrengthofunidirectionalpolymermatrixcompositesmaterialsinasandwichbeamconfigurationmaybefoundinTestMethodD5467/D5467M.2.ReferencedDocuments2.1ASTMStandards:2C274TerminologyofStructuralSandwichConstructionsC393TestMethodforFlexuralPropertiesofSandwichConstructionsD3878TerminologyforCompositeMaterialsD5229/D5229MTestMethodforMoistureAbsorptionProp-ertiesandEquilibriumConditioningofPolymerMatrixCompositeMaterialsD5467/D5467MTestMethodforCompressivePropertiesofUnidirectionalPolymerMatrixCompositeMaterialsUs-inga...
