ASTM F1957-1999(2004) 复合泡沫材料硬度测定器硬度的标准试验方法

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【英文标准名称】:StandardTestMethodforCompositeFoamHardness-DurometerHardness
【原文标准名称】:复合泡沫材料硬度测定器硬度的标准试验方法
【标准号】:ASTMF1957-1999(2004)
【标准状态】:现行
【国别】:
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:F24.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:硬度;硬度计;压痕硬性;泡沫材料
【英文主题词】:durometer;foam;hardness;indentationhardness
【摘要】:Thistestmethodisbasedonthepenetrationbyaspecifictypeofindentorwhenforcedintothematerialunderspecifiedconditions.Theindentationhardnessisrelatedinverselytothepenetrationandisdependentontheelasticmodulusandviscoelasticbehaviorofthematerial.Thegeometryoftheindentorandtheappliedforceinfluencethemeasurements,suchthatnosimplerelationshipexistsbetweenthemeasurementsobtainedwithonetypeofdurometerandthoseobtainedwithanothertypeofdurometerorotherinstrumentsusedformeasuringhardness.Thistestmethodisanempiricaltestintendedprimarilyforcontrolpurposes.Nosimplerelationshipexistsbetweenindentationhardnessdeterminedbythistestmethodandanyfundamentalpropertyofthematerialtested.ForspecificationpurposesitisrecommendedthatTestMethodD785beusedforhardmaterialsandTestMethodD2240beusedforsolidelatomers.1.1Thistestmethoddescribesatypeofcompositefoamhardnessmeasurementdeviceknownasdurometer:TypeCF.Theprocedurefordeterminingindentationhardnessofsubstancescomprisedoftwoormoreelastomericmaterials,oneofwhichisafoamorfoamlikematerial.Theseareclassifiedascompositefoamstructures.Thecompositefoamproductmayhaveanarmaturemadeofamaterialsuitableforaddingstructuralintegrityincludingbutnotlimitedtometal,plastic,orwood.Thisconstructionistypicalforlapbarrestraints,seating,andotherrestraintdevices,aswellassomeshowelements.1.2Thistestmethodisnotequivalenttootherindentationhardnessmethodsandinstrumenttypes,specificallythosedescribedinTestMethodsD1415andD2240.1.3ThevaluesstatedinSIunitsaretoberegardedasstandard.Thevaluesgiveninparenthesesareforinformationonly.ManyofthestateddimensionsinSIaredirectconversionsfromtheU.S.customarysystemtoaccommodatetheinstrumentation,practices,andproceduresthatexistedpriortotheMetricConversionActof1975.1.4Allmaterials,instruments,orequipmentusedforthedeterminationofmassordimensionshallhavetraceabilitytotheNationalInstituteforStandardsandTechnology(NIST)orotherinternationallyrecognizedorganizations.1.5Thistestmethodisnotasafetystandardasitpertainstoridelegislation.Theuseofthistestmethodisoptionalbaseduponanagreementbetweencustomersandsuppliersoffoamproducts.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G31
【国际标准分类号】:83_100
【页数】:6P.;A4
【正文语种】: