【英文标准名称】:StandardTestMethodforFlatwiseFlexuralImpactResistanceofRigidPlastics
【原文标准名称】:测定硬质塑料的平面挠性冲击耐受性能的标准试验方法
【标准号】:ASTMD6395-2010
【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】:aging;exposure;flexural;impact;plasticmolding;plasticsheets;weathering;Weathering(plastics);Flatwiseflexuralimpacttesting;Impacttesting--plastics;Performance--plastics;Plasticmoldingmaterials;Rigidplastics
【摘要】:Theflatwiseflexuralimpacttestisatestinwhichthekineticenergylostbyamovingpendulumduringimpactisusedtodeterminetheenergytobreakordeformatestspecimen.ThestandardIzodtestapparatusasdescribedinTestMethodD256isretrofittedwithclampingjaws,whichholdthetestspecimensuchthattheflatfaceofthespecimenisstruckbythependulumduringatest.ThependulumshallbeastandardIzodpendulumasdescribedinTestMethodD256.Itshallbecapableofdeliveringanenergyof2.71x00B1;0.14J(2.00x00B1;0.10ft.-lbf).Exceptasdetailedin10.5,thisbasicpendulumshallbeusedwithallspecimensthatextractlessthan85%oftheavailableenergy.Higherenergypendulumsorabasicpendulumtowhichweightsareaddedtoincreaseitsavailableenergyshallbeusedwithspecimensthatrequiremoreenergytobreak.Aseriesofenergylevelssuchthateachhastwicetheenergyofthenextlighteronewillbefoundconvenient.Thestrikingnoseofthependulumshallcontactoneoftheflatfacesofthespecimenataspecifieddistanceabovetheclampedge.Theratioofthedistancebetweenthetopoftheclampandthecenterlineoftheroundedstrikingedgetothespecimenthicknessshallbe2.5x00B1;0.1.Thetypeoffailureofeachspecimentestedshallbeassignedoneofthefollowingcategories:CompleteBreak(C)Abreakinwhichthespecimenisseparatedintotwoormorepieces.HingeBreak(H)Anearlycompletebreakinwhichthereislittleornospringbackwhenthefreeendisbentordisplaced.PartialBreak(P)Anincompletebreakinwhichfractureextendsthroughatleast50%ofthespecimenthickness,andsuchthatthefreeendcanbebentwithrelativelylittleeffortyethasconsiderablespringback.Nonbreak(N)Aresultwherethereisnofractureorthefractureextendslessthan50%ofthespecimenthickness.Thevalueofthisimpacttestistodeterminethechangeinimpactpropertiesthatmayresultfromamaterialhavingbeenexposedtooneoraseriesofenvironments,suchasweatheringatdifferentintervalsordifferentintensitieswhenthesedataarecomparedtoafilesampleexposedonlytothestandardlaboratoryenvironmentorotheragreeduponconditions.Theflatwiseimpactresistanceiscalculatedasenergyabsorbedperunitofcross-sectionalarea.Beforeproceedingwiththistestmethod,referenceshouldbemadetothespecificationofthematerialbeingtested.Anytestspecimenpreparation,conditioning,dimensions,and/ortestingparameterscoveredinthematerialspecificationshalltakeprecedenceoverthosementionedinthistestmethodexceptincaseswheretodosowouldconflictwiththepurposeforconductingtesting.Iftherearenomaterialspecifications,thenthedefaultconditionsapply.1.1TheresistanceofplasticstobreakagebyflexuralshockmaybedeterminedbytestmethodssuchasthosecontainedinTestMethodD256.Specimensusedinthosetestmethodsfeatureamillednotchtopromotebrittlefracture.Thetestspecimensarestruckbyapendulumwiththedepthdimensionparalleltothedirectionofpendulumswing.Thistestmethodisdifferentiatedfromtheothersbyitsapplicationtotheassessmentoftheaffectonimpactresistanceofchangesinthesurfaceofspecimensresultingfromweatheringorothere......
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:6P.;A4
【正文语种】:英语