【英文标准名称】:StandardTestMethodforPendulumImpactResistanceofPlasticFilm
【原文标准名称】:塑料薄膜耐摆锤冲击的标准试验方法
【标准号】:ASTMD3420-2008a
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【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】:D20.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:film;impact;impactresistance;pendulum;pendulumimpact;Ballbursttest;Dynamicball(pendulum)bursttest;Impactresistance--plastics;Pendulumtest;Plasticsheetandfilm
【摘要】:Likeothertechniquestomeasuretoughness,thistestmethodprovidesameanstodetermineparametersofamaterialatstrainratesclosertosomeend-useapplicationsthanprovidedbylow-speeduniaxialtensiletests.Dynamictensilebehaviorofafilmisimportant,particularlywhenthefilmisusedasapackagingmaterial.Thesameuncertaintiesaboutcorrelationswiththicknessthatapplytootherimpacttestsalsoapplytothistest(seesection3.4ofTestMethodsD1709).Hence,noprovisionforrationalizingtounitthicknessisprovided.Also,noprovisionismadefortestingatnon-ambienttemperatures.Thistestmethodincludestwoprocedures,similarexceptwithregardtosamplesize:ProcedureAfor60-mmdiameterandProcedureBfor89-mmdiameter(commonlycalledthex201C;Spencerx201D;).Thedatahavenotbeenshownrelatabletoeachother.Severalimpacttestmethodsareusedforfilm.Itissometimesdesirabletoknowtherelationshipsamongtestresultsderivedbydifferentmethods.Astudywasconductedinwhichfourfilmsmadefromtworesins(polypropyleneandlinearlow-densitypolyethylene),withtwofilmthicknessesforeachresin,wereimpactedusingTestMethodsD1709(MethodA),TestMethodD3420(ProceduresAandB),andTestMethodD4272.ThetestresultsareshowninAppendixX2.DifferencesinresultsbetweenTestMethodsD1709andD4272areexpectedsinceTestMethodsD1709representsfailureinitiatedenergywhileTestMethodD4272isinitiationpluscompletionenergy.Somefilmshaveshownconsistencywhentheinitiationenergywasthesameasthetotalenergy.ThisstatementandthetestdataalsoappearinthesignificanceandappendixessectionsofTestMethodsofD1709andD4272.1.1Thistestmethodcoversthedeterminationofresistanceoffilmtoimpact-puncturepenetration.Knowledgeofhowtheimpactenergyisabsorbedbythespecimenwhileitisdeformingundertheimpactloading,andthebehaviorofthespecimenafteryielding,isnotprovidedbythistest.Noprovisionismadefornonambienttemperaturesinthistestmethod.1.2ThevaluesstatedinSIunitsaretoberegardedasthestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.SpecifichazardsstatementsaregiveninSection7.Note18212;ThereisnoknownISOequivalenttothisstandard.
【中国标准分类号】:G31
【国际标准分类号】:83_140_10
【页数】:6P.;A4
【正文语种】:英语
基本信息
| 标准名称： | 核电工程测量基准网的建立和管理规定 |
| 发布部门： | 国家能源局 |
| 发布日期： | 2012-10-19 |
| 实施日期： | 2013-03-01 |
| 首发日期： | |
| 作废日期： | |
| 出版日期： | 2013-03-01 |
适用范围
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前言
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所属分类： 农业 林业 林业 森林经营技术 农业 农业和林业 绿化和造林