Designation:C481−99(Reapproved2016)StandardTestMethodforLaboratoryAgingofSandwichConstructions1ThisstandardisissuedunderthefixeddesignationC481;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thistestmethodcoversthedeterminationoftheresis-tanceofsandwichpanelstosevereexposureconditionsasmeasuredbythechangeinselectedpropertiesofthematerialafterexposure.Theexposurecycletowhichthespecimenissubjectedisanarbitrarytesthavingnocorrelationwithnaturalweatheringconditions.1.2ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.2.1Exception—Theinch-poundunitsareprovidedforinformationonly.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C273TestMethodforShearPropertiesofSandwichCoreMaterialsC297/C297MTestMethodforFlatwiseTensileStrengthofSandwichConstructionsC363TestMethodforDelaminationStrengthofHoneycombCoreMaterialsC364TestMethodforEdgewiseCompressiveStrengthofSandwichConstructionsC365/C365MTestMethodforFlatwiseCompressiveProp-ertiesofSandwichCoresC393TestMethodforFlexuralPropertiesofSandwichConstructionsD1781TestMethodforClimbingDrumPeelforAdhesives3.SignificanceandUse3.1Mostsandwichpanelsaresubjectedtovarioustempera-tureandhumidityenvironments.Thislaboratoryagingtestdeterminestheselectedpanelpropertydegradationundersimulatedconditions.3.2Thesetestmethodsprovideastandardmethodofobtainingsimulatedenvironmentaldegradationdataforqualitycontrol,acceptancespecificationtesting,andresearchanddevelopment;however,th...
