ASTM D6773-2008 利用锌基轴承环剪切试验机进行标准的剪切试验方法

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【英文标准名称】:StandardShearTestMethodforBulkSolidsUsingtheSchulzeRingShearTester
【原文标准名称】:利用锌基轴承环剪切试验机进行标准的剪切试验方法
【标准号】:ASTMD6773-2008
【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】:D18.24
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:bulksolid;effectiveangleoffriction;effectiveyieldlocus;flowfunction;flowability;JenikeShearCell;internalfrictionangle;kinematicwallfrictionangle;powder;SchulzeRingShearTester;translationalsheartester;unconfinedyie
【摘要】:Reliable,controlledflowofbulksolidsfrombinsandhoppersisessentialinalmosteveryindustrialfacility.Unfortunately,flowstoppagesduetoarchingandratholingarecommon.Additionalproblemsincludeuncontrolledflow(flooding)ofpowders,segregationofparticlemixtures,useablecapacitywhichissignificantlylessthandesigncapacity,cakingandspoilageofbulksolidsinstagnantzones,andstructuralfailures.Bymeasuringtheflowpropertiesofbulksolids,anddesigningbinsandhoppersbasedontheseflowproperties,mostflowproblemscanbepreventedoreliminated(1).Forbulksolidswithasignificantpercentageofparticles(typically,onethirdormore)finerthanabout6mm(x00BC;in.),theunconfinedyieldstrengthisgovernedbythefines(x2212;6mmfraction).Forsuchbulksolids,strengthandwallfrictiontestsmaybeperformedonthefinefractiononly.Thistestmethodcoversoperationofthemanually-controlledSchulzeRingShearTester.Anautomatedversionofthistesterisalsoavailable.Itsmethodoftestingbulksolidsissimilarinprincipletothatdescribedinthistestmethod.Note18212;Thequalityoftheresultproducedbythisstandardisdependentonthecompetenceofpersonnelperformingit,andthesuitabilityoftheequipmentandfacilitiesused.AgenciesthatmeetthecriteriaofPracticeD3740aregenerallyconsideredcapableofcompetentandobjectivetesting/sampling/inspection/etc.UsersofthisstandardarecautionedthatcompliancewithPracticeD3740doesnotinitselfassurereliableresults.Reliableresultsdependonmanyfactors;PracticeD3740providesameansofevaluatingsomeofthosefactors.PracticeD3740wasdevelopedforagenciesengagedinthetestingorinspection(orboth)ofsoilandrock.Assuchitisnottotallyapplicabletoagenciesperformingthisstandard.However,usersofthisstandardshouldrecognizethattheframeworkofPracticeD3740isappropriateforevaluatingthequalityofanagencyperformingthisstandard.Currentlythereisnoknownqualifyingnationalauthoritythatinspectsagenciesthatperformthisstandard.1.1Thistestmethodcoverstheapparatusandproceduresformeasuringtheunconfinedyieldstrengthofbulksolidsduringbothcontinuousflowandafterstorageatrest.Inaddition,measurementsofinternalfriction,bulkdensity,andwallfrictiononvariouswallsurfacesareincluded.1.2Themostcommonuseofthisinformationisinthedesignofstoragebinsandhopperstopreventflowstoppagesduetoarchingandratholing,includingtheslopeandsmoothnessofhopperwallstoprovidemassflow.Parametersforstructuraldesignofsuchequipmentmayalsobederivedfromthisdata.Anotherapplicationisthemeasurementoftheflowabilityofbulksolids,forexample,forcomparisonofdifferentproductsoroptimization.1.3AllobservedandcalculatedvaluesshallconformtotheguidelinesforsignificantdigitsandroundingestablishedinPracticeD6026.1.3.1Theproceduresusedtospecifyhowdataarecollected/recordedorcalculatedinthisstandardareregardedastheindustrystandard.Inaddition,theyarerepresentativeofthesignificantdigitsthatgenerallyshouldberetained.Theproceduresuseddonotconsidermaterialvariation,purposeforobtainingthedata,specialpurposestudies,oranyconsiderationsfortheuserx2019;sobjectives:anditiscommonpracticetoincreaseorreducesignificantdigitsofreporteddatatobecommensuratewiththeseconsiderations.Itisbeyo......
【中国标准分类号】:N70
【国际标准分类号】:59_080_01
【页数】:28P.;A4
【正文语种】:英语