ASTM D6110-2010 测定塑料切口试样的抗夏氏冲击性能的标准试验方法

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【英文标准名称】:StandardTestMethodforDeterminingtheCharpyImpactResistanceofNotchedSpecimensofPlastics
【原文标准名称】:测定塑料切口试样的抗夏氏冲击性能的标准试验方法
【标准号】:ASTMD6110-2010
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:D20.10
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:Charpyimpact;impactresistance;notchsensitivity;notchedspecimen;Charpyimpacttest;Impacttesting--Charpy;Notchedplasticspecimens;Windageandfrictioncorrectionchart
【摘要】:Beforeproceedingwiththistestmethod,refertothematerialspecificationforthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensionsandtestingparametersrequiredbythematerialsspecificationshalltakeprecedenceoverthoserequiredbythistestmethod.Table1ofClassificationD4000liststheASTMmaterialsstandardsthatcurrentlyexist.Ifthereisnomaterialspecification,thentherequirementsofthistestmethodapply.Thependulumimpacttestindicatestheenergytobreakstandardtestspecimensofspecifiedsizeunderstipulatedconditionsofspecimenmounting,notching(stressconcentration),andpendulumvelocityatimpact.Forthistestmethod,theenergylostbythependulumduringthebreakageofthespecimenisthesumoftheenergiesrequiredtoinitiatefractureofthespecimen;topropagatethefractureacrossthespecimen;tothrowthefreeendsofthebrokenspecimen(tossenergy);tobendthespecimen;toproducevibrationinthependulumarm;toproducevibrationorhorizontalmovementofthemachineframeorbase;toovercomefrictioninthependulumbearingandintheindicatingmechanism,andtoovercomewindage(pendulumairdrag);toindentordeform,plastically,thespecimenatthelineofimpact;andtoovercomethefrictioncausedbytherubbingofthestrikingnoseoverthefaceofthebentspecimen.Note58212;Thetossenergy,ortheenergyusedtothrowthefreeendsofthebrokenspecimen,issuspectedtorepresentaverylargefractionofthetotalenergyabsorbedwhentestingrelativelydenseandbrittlematerials.NoprocedurehasbeenestablishedforestimatingthetossenergyfortheCharpymethod.Fortough,ductile,fiber-filled,orcloth-laminatedmaterials,thefracturepropagationenergyisusuallylargecomparedtothefractureinitiationenergy.Whentestingthesematerials,energylossesduetofracturepropagation,vibration,frictionbetweenthestrikingnoseandthespecimenhasthepotentialtobecomequitesignificant,evenwhenthespecimenisaccuratelymachinedandpositioned,andthemachineisingoodconditionwithadequatecapacity(seeNote6).Significantenergylossesduetobendingandindentationwhentestingsoftmaterialshavealsobeenobserved.Note68212;Althoughtheframeandthebaseofthemachinemustbesufficientlyrigidandmassivetohandletheenergiesoftoughspecimenswithoutmotionorexcessivevibration,thependulumarmcannotbemadeverymassivebecausethegreaterpartofitsmassmustbeconcentratednearitscenterofpercussionatitsstrikingnose.Locatingthestrikingnosepreciselyatthecenterofpercussionreducesthevibrationofthependulumarmwhenusedwithbrittlespecimens.Somelossesduetopendulumarmvibration(theamountvaryingwiththedesignofthependulum)willoccurwithtoughspecimensevenwhenthestrikingnoseisproperlypositioned.Inawell-designedmachineofsufficientrigidityandmass,thelossesduetovibrationandfrictioninthependulumbearingandintheindicatingmechanismwillbeverysmall.Vibrationallossesareobservedwhenwidespecimensoftoughmaterialsaretestedinmachinesofinsufficientmass,orinmachinesthatarenotsecurelyfastenedtoaheavybase.Sincethistestmethodpermitsavariationinthewidthofthespecimensandsincethewidthdictates,formanymaterials,whetherabrittle,low-energybreak(asevidencedbylittleornodrawingdownorneckingandbyarelativelylowenergyabsorption)oraductile,high-energybreak(asevidencedbyconsiderabledrawingorneckingdownintheregionbehindthenotchandbyarelativelyhighenergyabsorption)willoccur,itis........
【中国标准分类号】:G31
【国际标准分类号】:83_140_01
【页数】:17P.;A4
【正文语种】:英语