NF L17-452-1988 航空航天.热固性树脂预浸织物.耐垂直拉伸试验
作者:标准资料网 时间:2024-05-19 11:29:49 浏览:9510
来源:标准资料网
【英文标准名称】:Aerospace.Fabricpre-impregnatedwiththermosettingresin.Perpendiculartensileresistancetest.
【原文标准名称】:航空航天.热固性树脂预浸织物.耐垂直拉伸试验
【标准号】:NFL17-452-1988
【标准状态】:现行
【国别】:法国
【发布日期】:1988-10-01
【实施或试行日期】:1988-10-05
【发布单位】:法国标准化协会(AFNOR)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:
【中国标准分类号】:V13
【国际标准分类号】:49_025_40;83_120;49_025_60
【页数】:6P;A4
【正文语种】:其他
【英文标准名称】:Testmethodsofcopperfoilforprintedwiringboards
【原文标准名称】:印制电路板用铜箔试验方法
【标准号】:JISC6511-1992
【标准状态】:作废
【国别】:日本
【发布日期】:1992-01-01
【实施或试行日期】:1992-01-01
【发布单位】:日本工业标准调查会(JISC)
【起草单位】:Electronics
【标准类型】:()
【标准水平】:()
【中文主题词】:过渡金属元素;箔;印制电路基板;铜;电解镀层;试验;材料(按形状分)
【英文主题词】:electrodeposition;;;foil;materialsbyform;;testing
【摘要】:
【中国标准分类号】:L30
【国际标准分类号】:31_180
【页数】:10P;A4
【正文语种】:日语
【英文标准名称】:StandardTestMethodforDeterminingtheEffectofFreeze-ThawonHydraulicConductivityofCompactedorIntactSoilSpecimensUsingaFlexibleWallPermeameter
【原文标准名称】:使用一柔壁渗透计对压实的或原状土壤样品液体导电性冻融效果测定的标准试验方法
【标准号】:ASTMD6035-2008
【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】:D18.19
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:coefficientofpermeability;cover;freeze-thaw;hydraulicconductivity;liner;permeameter,Coefficientofpermeability;Compactioncontrol;Cover;Freezingandthawing--soil/rock;Hydraulicconductivity/transmissivity;Liner;Permeability--soil/roc
【摘要】:Thistestmethodidentifiesthechangesinhydraulicconductivityasaresultoffreeze-thawonnaturalsoilsonly.Itistheuser''sresponsibilitywhenusingthistestmethodtodeterminetheappropriatemoisturecontentofthelaboratory-compactedspecimens(thatis,dry,wet,oratoptimummoisturecontent)(Note2).Note28212;Itiscommonpracticetoconstructclaylinersandcoversatoptimumorgreaterthanoptimummoisturecontent.Specimenscompacteddryofoptimummoisturecontenttypicallydonotcontainlargerporesizesasaresultoffreeze-thawbecausetheeffectsoffreeze-thawareminimizedbythelackofwaterinthesample.Therefore,theeffectoffreeze-thawonthehydraulicconductivityisminimal,orthehydraulicconductivitymayincreaseslightly.,Therequestormustprovideinformationregardingtheeffectivestressestobeappliedduringtesting,especiallyfordeterminingthefinalhydraulicconductivity.Usinghigheffectivestresses(thatis,35kPa(5psi)asallowedbyTestMethodD5084)candecreaseanalreadyincreasedhydraulicconductivityresultinginlowerfinalhydraulicconductivityvalues.Thelong-termeffectoffreeze-thawonthehydraulicconductivityofcompactedsoilsisunknown.Theincreasedhydraulicconductivitycausedbyfreeze-thawmaybetemporary.Forexample,theoverburdenpressureimpartedbythewasteplacedonasoillinerinalandfillafterbeingsubjectedtofreeze-thawmayreducethesizeofthecracksandporesthatcausetheincreaseinhydraulicconductivity.Itisnotknownifthepressurewouldovercomethemacroscopicallyincreasedhydraulicconductivitysufficientlytoreturnthesoiltoitsoriginalhydraulicconductivity(priortofreeze-thaw).Forcasessuchaslandfillcovers,wheretheoverburdenpressureislow,theincreaseinhydraulicconductivityduetofreeze-thawwilllikelybepermanent.Thus,therequestormusttaketheapplicationofthetestmethodintoaccountwhenestablishingtheeffectivestress.Thespecimenshallbefrozentox2212;15x00B0;Cunlesstherequestorspecificallydictatesotherwise.Ithasbeendocumentedintheliteraturethattheinitial(thatis,0tox2212;15x00B0;C)freezingconditioncausesthemostsignificanteffectsinhydraulicconductivity.Freezingrateandultimatetemperatureshouldmimicthefieldconditions.Ithasbeenshownthatsuperfreezing(thatis,freezingthespecimenatverycoldtemperaturesandveryshorttimeperiods)produceserroneousresults.Thethawedspecimentemperatureandthawrateshallmimicfieldconditions.Thawingspecimensinanoven(thatis,overheating)willproduceerroneousresults.Literaturerelatingtothissubjectindicatesthattheeffectsoffreeze-thawusuallyoccurbyCycle10,thusitisrecommendedthatatleast10freeze-thawcyclesshallbeperformedtoensurethatthefulleffectsoffreeze-thawaremeasured.Ifthehydraulicconductivityvaluesarestillincreasingafter10freeze-thawcycles,thetestmethodshallbecontinued(thatis,morefreeze-thawcyclesshallbeperformed).Note38212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofthepersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfact............
【中国标准分类号】:D10
【国际标准分类号】:13_080_20
【页数】:5P.;A4
【正文语种】:英语
