SAE AMS3892/5 Tow Or Yarn, Carbon Fibers for Structural Composites, Gf 220 (1517) Tensile Strength, 75 (517) Tensile Mod
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Product Code:SAE AMS3892/5
Title:Tow Or Yarn, Carbon Fibers for Structural Composites, Gf 220 (1517) Tensile Strength, 75 (517) Tensile Modulus
Issuing Committee:Ams P Polymeric Materials Committee
Scope:This specification covers one type of continuous multifilament carbon fibers in the form of a tow or yarn (when twisted). The weight per unit length of the tow or yarn is governed by the filament count which is identified by the supplier's grade or material designation. Carbon tow or yarn, derived from a polyacrylonitrile precursor, with typical 220 ksi (1517 MPa) tensile strength and 75 Msi (517 GPa) tensile modulus for use in general purpose structural composites requiring very high modulus of elasticity and moderately high tensile strength
【英文标准名称】:StandardTestMethodforSoilCompactionDeterminationatShallowDepthsUsing5-lb(2.3kg)DynamicConePenetrometer
【原文标准名称】:用5-lb(2.3kg)动力触探仪在浅层测定土壤压实的标准试验方法
【标准号】:ASTMD7380-2008
【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】:D18.08
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:compactiontest;cone;conepenetrometer;constructioncontrol;dynamicconepenetrationtest;5-lbDCP;soilcompaction;percentcompaction;soildensity;watercontent
【摘要】:p>Thetestmethodisusedtoassessthecompactioneffortofcompactedmaterials.Thenumberofdropsrequiredtodrivetheconeadistanceof3.25in.(83mm)isusedasacriteriontodeterminethepassorfailintermsofsoilpercentcompaction.Thedevicedoesnotmeasuresoilcompactiondirectlyandrequiresdeterminingthecorrelationbetweenthenumberofdropsandpercentcompactioninsimilarsoilofknownpercentcompactionandwatercontent.Thenumberofdropsisdependentonthesoilwatercontent.Calibrationofthedeviceshouldbeperformedatawatercontentequaltothewatercontentexpectedinthefield.ThereareotherDCPswithdifferentdimensions,hammerweights,conesizes,andconegeometries.Differenttestmethodsexistforthesedevices(suchasD6951)andthecorrelationsofthe5-lbDCPwithsoilpercentcompactionareuniquetothisdevice.The5-lbDCPisasimpledevice,capableofbeinghandledandoperatedbyasingleoperatorinfieldconditions.ItistypicallyusedasQualityControl(QC)oflayer-by-layercompactionbyconstructioncrewinroadwaypavement,backfillcompactioninconfinedcutsandtrenches,andutilitypavementrestorationwork.Note28212;Thequalityofresultsproducedbythistestmethodisdependentonthecompetenceofthepersonnelperformingitandthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthesefactors.1.1Thistestmethodcoverstheprocedureforthedeterminationofthenumberofdropsrequiredforadynamicconepenetrometerwitha5-lb(2.3-kg)drophammerfalling20in.(508mm)topenetrateacertaindepthincompactedbackfill.1.2Thedeviceisusedinthecompactionverificationoffine-andcoarse-grainedsoils,granularmaterials,andweakstabilizedormodifiedmaterialusedinsubgrade,baselayers,andbackfillcompactioninconfinedcutsandtrenchesatshallowdepth.1.3Thetestmethodisnotapplicabletohighlystabilizedandcementedmaterialsorgranularmaterialscontainingalargepercentageofaggregatesgreaterthan1.5in.(37mm).1.4Themethodisdependentuponknowingthefieldwatercontentandtheuserhavingperformedcalibrationteststodetermineconepenetrationresistanceofvariouscompactionlevelsandwatercontents.1.5Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.Note18212;Itiscommonpracticeintheengineeringprofessiontoconcurrentlyusepoundstorepresentbothaunitofmass(lbm)andaforce(lbf).Thisstandardhasbeenwrittenusingthegravitationalsystemofunits(lbf)whendealingwiththeinch-poundsystem.Inthissystem,thepound(lbf)representsaunitofforce(weight).However,theuseofbalancesorscalesrecordingpoundsofmass(lbm)orthereadingofdensityinlbm/ft3shallnotberegardedasanonconformancewiththisstandard.1.6AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.7Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsu......
【中国标准分类号】:B11
【国际标准分类号】:13_080_20;93_020
【页数】:8P.;A4
【正文语种】:英语
【英文标准名称】:MethodsofTestingandRatingBottledandCannedBeverageVendorsandCoolers
【原文标准名称】:瓶装和罐装饮料零售机和冷藏箱的额定值和试验方法
【标准号】:ANSI/ASHRAE32.1-2004
【标准状态】:作废
【国别】:美国
【发布日期】:2004
【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】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:自动售货机;试验方法;制冷
【英文主题词】:Refrigeration;Testmethods;Vendingmachines
【摘要】:Thisproposedrevisionupdatesthestandardtoincludevendingmachinesforothertypesofsealedcontainersbesidesbottlesandcans.This2ndpublicreviewdraftincreasesthetoleranceofinstrumentsandsystemsformeasuringelectricalenergy,addsarequirementtoconducttheenergyconsumptiontestat75?Fambient,rewordstheprovisionregardingthemeasurementofbeveragetemperatureintherecoverytest,andspecifieshowtoconductanenergyconsumptiontestintropicalconditions.
【中国标准分类号】:X90
【国际标准分类号】:55_230;97_040_30
【页数】:
【正文语种】:英语