Designation:C1548−02(Reapproved2012)StandardTestMethodforDynamicYoung’sModulus,ShearModulus,andPoisson’sRatioofRefractoryMaterialsbyImpulseExcitationofVibration1ThisstandardisissuedunderthefixeddesignationC1548;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthemeasurementofthefunda-mentalresonantfrequenciesforthepurposeofcalculatingthedynamicYoung’smodulus,thedynamicshearmodulus(alsoknownasthemodulusofrigidity),andthedynamicPoisson’sratioofrefractorymaterialsatambienttemperatures.Speci-mensofthesematerialspossessspecificmechanicalresonantfrequencies,whicharedeterminedbytheelasticmodulus,mass,andgeometryofthetestspecimen.Therefore,thedynamicelasticpropertiescanbecomputedifthegeometry,mass,andmechanicalresonantfrequenciesofasuitablespecimencanbemeasured.ThedynamicYoung’smodulusisdeterminedusingtheresonantfrequencyintheflexuralmodeofvibrationandthedynamicshearmodulusisdeterminedusingtheresonantfrequencyinthetorsionalmodeofvibration.Poisson’sratioiscomputedfromthedynamicYoung’smodu-lusandthedynamicshearmodulus.1.2Althoughnotspecificallydescribedherein,thismethodcanalsobeperformedathightemperatureswithsuitableequipmentmodificationsandappropriatemodificationstothecalculationstocompensateforthermalexpansion.1.3ThevaluesarestatedinSIunitsandaretoberegardedasthestandard.1.4Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeter-minetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C71TerminologyRelatingtoRefractoriesC215TestMethodforFundamentalTransverse,Longitudinal,andTorsionalResonantFrequenciesofC...
