ASTM E 1568-2003 用燃烧鉴定重量测定法测定活性碳中金含量的标准试验方法

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Product Code:SAE J141
Title:Seat Belt Hardware Performance Requirements
Issuing Committee:Seat Belt Systems Standards Committee
Scope: This SAE Recommended Practice describes performance requirements for hardware used in motor vehicle seat belt assemblies when tested in accordance with the test procedures specified in SAE J140. Test procedures and performance requirements for retractors will be covered in separate SAE Recommended Practices to issued later.
Rationale: This SAE Recommended Practice describes performance requirements for hardware used in motor vehicle seat belt assemblies when tested in accordance with the test procedures specified in SAE J140. Test procedures and performance requirements for retractors will be covered in separate SAE Recommended Practices to issued later.【英文标准名称】:TestMethodsforImpactResistanceofPlasticsandElectricalInsulatingMaterials(08.01,09.02)
【原文标准名称】:塑料及电绝缘材料抗冲击性试验方法
【标准号】:ANSI/ASTMD256-1993
【标准状态】:现行
【国别】:美国
【发布日期】:1993
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:电绝缘材料;塑料;试验;冲击强度
【英文主题词】:impactstrength;electricalinsulatingmaterials;testing;plastics
【摘要】:Thesetestmethodscoverthedeterminationoftheresistanceofplasticsto"standardized"(seeNote0)pendulum-typehammers,mountedin"standardized"machines,inbreakingstandardspecimenswithonependulumswing(seeNote0).Thestandardtestsforthesetestmethodsrequirespecimensmadewithamillednotch(seeNote0).InTestMethodsA,C,andD,thenotchproducesastressconcentrationthatincreasestheprobabilityofabrittle,ratherthanaductile,fracture.InTestMethodE,theimpactresistanceisobtainedbreakagebyflexuralshockasindicatedbytheenergyextractedfrombyreversingthenotchedspecimen180intheclampingvise.Theresultsofalltestmethodsarereportedintermsofenergyabsorbedperunitofspecimenwidthorperunitofcross-sectionalareaunderthenotch.(SeeNote0.)Note0Themachineswiththeirpendulum-typehammershavebeen"standardized"inthattheymustcomplywithcertainrequirements,includingafixedheightofhammerfallthatresultsinasubstantiallyfixedvelocityofthehammeratthemomentofimpact.However,hammersofdifferentinitialenergies(producedbyvaryingtheireffectiveweights)arerecommendedforusewithspecimensofdifferentimpactresistance.Moreover,manufacturersoftheequipmentarepermittedtousedifferentlengthsandconstructionsofpendulumswithpossibledifferencesinpendulumrigiditiesresulting.(SeeSection.)Beawarethatotherdifferencesinmachinedesignmayexist.Thespecimensare"standardized"inthattheyarerequiredtohaveonefixedlength,onefixeddepth,andoneparticulardesignofmillednotch.Thewidthofthespecimensispermittedtovarybetweenlimits.Note0Resultsgeneratedusingpendulumsthatutilizealoadcelltorecordtheimpactforceandthusimpactenergy,maynotbeequivalenttoresultsthataregeneratedusingmanuallyordigitallyencodedtestersthatmeasuretheenergyremaininginthependulumafterimpact.Note0ThenotchintheIzodspecimenservestoconcentratethestress,minimizeplasticdeformation,anddirectthefracturetothepartofthespecimenbehindthenotch.Scatterinenergy-to-breakisthusreduced.However,becauseofdifferencesintheelasticandviscoelasticpropertiesofplastics,responsetoagivennotchvariesamongmaterials.Ameasureofaplastic's"notchsensitivity"maybeobtainedwithTestMethodDbycomparingtheenergiestobreakspecimenshavingdifferentradiiatthebaseofthenotch.Note0Cautionmustbeexercisedininterpretingtheresultsofthesestandardtestmethods.Thefollowingtestingparametersmayaffecttestresultssignificantly:Methodoffabrication,includingbutnotlimitedtoprocessingtechnology,moldingconditions,molddesign,andthermaltreatments;Methodofnotching;Speedofnotchingtool;Designofnotchingapparatus;Qualityofthenotch;Timebetweennotchingandtest;Testspecimenthickness,Testspecimenwidthundernotch,andEnvironmentalconditioning.ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninbracketsareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.ThesetestmethodsresembleISO180:1993inregardtotitleonly.Thecontentsaresignificantlydifferent.
【中国标准分类号】:K15
【国际标准分类号】:29_035_20
【页数】:
【正文语种】:英语