DIN 41900-1968 额定电压1KV以上和额定功率0.2KVA以上的射频发射机电容器.

上一篇: DIN 47610-1-1968 通信电缆用连接套管.铅套管
下一篇: DIN 42530-1-1968 变压器；户内和户外套管.装配等级IN.250-3150A

Product Code:SAE AMS3798/15
Title:Webbing, Low Modulus Aramid, 1 (25) Wide, 2,500 (11,121) Breaking Strength, Herringbone Twill
Issuing Committee:Ams P Polymeric Materials Committee
Scope: This specification covers one width and one strength of low-modulus aramid webbing. This product has been used in construction of parachutes, but usage is not limited to such applications. 1 inch (25.4 mm) wide low-modulus aramid webbing having 2,500 pounds force (11,121 N) breaking strength.
Rationale: This specification covers one width and one strength of low-modulus aramid webbing. This product has been used in construction of parachutes, but usage is not limited to such applications. 1 inch (25.4 mm) wide low-modulus aramid webbing having 2,500 pounds force (11,121 N) breaking strength.【英文标准名称】:Plastics-Determinationofmulti-axialimpactbehaviourofrigidplastics-Non-instrumentedimpacttesting
【原文标准名称】:塑料.硬质塑料复合轴向冲击性能的测定.非仪器冲击试验
【标准号】:BSENISO6603-1-2000
【标准状态】:现行
【国别】:英国
【发布日期】:2000-06-15
【实施或试行日期】:2000-06-15
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:试验设备;高聚物;薄板材;增强的材料;塑料和橡胶技术;轴向;试样;叠层板材;塑料;模塑材料;试样制备;渗透性试验;数学计算;冲击试验
【英文主题词】:
【摘要】:ThisInternationalStandardspecifiesmethodsforthedeterminationofpuncture-impactpropertiesofrigidplasticsintheformofflattestspecimens,suchasdiscsorsquarepieces,underdefinedconditions.Specimensmaybemouldeddirectly,cutfromsheetsortakenfromfinishedproducts.Differenttypesoftestspecimensandtestconditionsaredefined.Thesefalling-dartmethodsareusedtoinvestigatethebehaviourofplasticsheetingormouldingsundertheimpactofastrikerappliedperpendiculartotheplaneofthespecimen.ThispartofISO6603canbeusedifitissufficienttocharacterizetheimpactbehaviourofplasticsbyathresholdvalueofimpact-failureenergybasedonmanytestspecimens.ISO6603-2isusedifaforce-deflectionorforce-timediagram,recordedatnominallyconstantstrikervelocity,isnecessaryfordetailedcharacterizationoftheimpactbehaviour.Thesetestmethodsareapplicabletospecimenswithathicknessbetween1mmand4mm.NOTEForthicknesseslessthan1mm,ISO7765shouldpreferablybeused.Thicknessesgreaterthan4mmmaybetestediftheequipmentissuitable,butthetestfallsoutsidethescopeofISO6603-1andISO6603-2.Thesemethodsaresuitableforusewiththefollowingtypesofmaterial:—rigidthermoplasticmouldingandextrusionmaterials,includingfilled,unfilledandreinforcedcompoundsandsheets;—rigidthermosettingmouldingandextrusionmaterials,includingfilledandreinforcedcompounds,sheetsandlaminates;—fibre-reinforcedthermosetandthermoplasticcompositesincorporatingunidirectionalornon-unidirectionalreinforcementssuchasmats,wovenfabrics,wovenrovings,choppedstrands,combinationandhybridreinforcements,rovings,milledfibresandsheetsmadefrompre-impregnatedmaterials(prepregs).Thesemethodsarealsoapplicabletospecimenswhichareeithermouldedormachinedfromfinishedproducts,laminatesandextrudedorcastsheet.Thetestresultsarecomparableonlyiftheconditionsofpreparationofthespecimens,theirdimensionsandsurfacesaswellasthetestconditionsarethesame.Inparticular,resultsdeterminedonspecimensofdifferentthicknesscannotbecomparedwithoneanother(seeannexEofISO6603-2:—).Comprehensiveevaluationofthereactiontoimpactstressrequiresthatdeterminationsbemadeasafunctionofimpactvelocityandtemperaturefordifferentmaterialvariables,suchascrystallinityandmoisturecontent.Theimpactbehaviouroffinishedproductscannotbepredicteddirectlyfromthistest,butspecimensmaybetakenfromfinishedproducts(seeabove)fortestbythesemethods.Testdatadevelopedbythesemethodsshouldnotbeusedfordesigncalculations.However,informationonthetypicalbehaviourofthematerialcanbeobtainedbytestingatdifferenttemperaturesandimpactvelocities(seeannexDofISO6603-2:—),byvaryingthethickness(seeannexEofISO6603-2:—)andbytestingspecimenspreparedunderdifferentconditions.TwostatisticalmethodsoftestaredescribedinthispartofISO6603:—MethodA:staircasemethod(individual)(preferred)Inthismethod,auniformenergyincrementisemployedduringtesting.Theenergyisdecreasedorincreasedbytheuniformincrementaftertestingeachspecimen,dependingupontheobservedresult(passorfail)fortheprecedingtest.—MethodB:groupmethod(optional)Inthismethod,successivegroupsofatleasttentestspecimensaretested.Theimpactfailureenergyiscalculatedbystatistics.
【中国标准分类号】:G31
【国际标准分类号】:83_080_01
【页数】:32P;A4
【正文语种】:英语