DIN 1831-1-1982 镶嵌刀片的三面刃铣刀.第1部分:尺寸
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来源:标准资料网
【英文标准名称】:Sideandfacemillingcutterswithinsertedcuttingblades;dimensions
【原文标准名称】:镶嵌刀片的三面刃铣刀.第1部分:尺寸
【标准号】:DIN1831-1-1982
【标准状态】:现行
【国别】:德国
【发布日期】:1982-06
【实施或试行日期】:
【发布单位】:德国标准化学会(DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:工具;侧平两用铣刀;尺寸;铣刀
【英文主题词】:dimensions;tools;millingcutters;side-and-facecutters
【摘要】:Sideandfacemillingcutterswithinsertedcuttingblades;dimensionsFraises3taillesàlamesamovibles;dimensions
【中国标准分类号】:J41
【国际标准分类号】:25_100_20
【页数】:2P;A4
【正文语种】:德语
【英文标准名称】:StandardTestMethodforFlexuralToughnessofFiberReinforcedConcrete(UsingCentrallyLoadedRoundPanel)
【原文标准名称】:纤维增强混凝土的挠性强度的标准试验方法(利用中心负荷圆形板)
【标准号】:ASTMC1550-2010a
【标准状态】:现行
【国别】:美国
【发布日期】:2010
【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】:C09.42
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:energyabsorption;fiber-reinforcedconcrete;flexure;post-crackbehavior;toughness;Concrete;Fiber-reinforcedconcrete;Flexuraltesting--concrete;Postcrackingstrength
【摘要】:Thepost-crackbehaviorofplate-like,fiber-reinforcedconcretestructuralmembersiswellrepresentedbyacentrallyloadedroundpaneltestspecimenthatissimplysupportedonthreepivotssymmetricallyarrangedarounditscircumference.Suchatestpanelexperiencesbi-axialbendinginresponsetoacentralpointloadandexhibitsamodeoffailurerelatedtotheinsitubehaviorofstructures.Thepost-crackperformanceofroundpanelssubjecttoacentralpointloadcanberepresentedbytheenergyabsorbedbythepaneluptoaspecifiedcentraldeflection.Inthistestmethod,theenergyabsorbeduptoaspecifiedcentraldeflectionistakentorepresenttheabilityofafiber-reinforcedconcretetoredistributestressfollowingcracking.Note18212;Theuseofthreepivotedpointsupportsinthetestconfigurationresultsindeterminateout-of-planereactionspriortocracking,howeverthesupportreactionsareindeterminateaftercrackingduetotheunknowndistributionofflexuralresistancealongeachcrack.Thereisalsoachangeintheloadresistancemechanisminthespecimenasthetestproceeds,startingwithpredominantlyflexuralresistanceandprogressingtotensilemembraneactionaroundthecenterastheimposeddeflectionisincreased.Theenergyabsorbeduptoaspecifiedcentraldeflectionisrelatedtothetoughnessofthematerialbutisspecifictothisspecimenconfigurationbecauseitisalsodeterminedbythesupportconditionsandsizeofthespecimen.Selectionofthemostappropriatecentraldeflectiontospecifydependsontheintendedapplicationforthematerial.Theenergyabsorbedupto5mmcentraldeflectionisapplicabletosituationsinwhichthematerialisrequiredtoholdcrackstightlyclosedatlowlevelsofdeformation.Examplesincludefinalliningsinundergroundcivilstructuressuchasrailwaytunnelsthatmayberequiredtoremainwater-tight.Theenergyabsorbedupto40mmismoreapplicabletosituationsinthatthematerialisexpectedtosufferseveredeformationinsitu(forexample,shotcreteliningsinminetunnelsandtemporaryliningsinswellingground).Energyabsorptionuptointermediatevaluesofcentraldeflectioncanbespecifiedinsituationsrequiringperformanceatintermediatelevelsofdeformation.Themotivationforuseofaroundpanelwiththreesupportsisbasedonthewithin-batchrepeatabilityfoundinlaboratoryandfieldexperience.Theconsistencyofthefailuremodethatarisesthroughtheuseofthreesymmetricallyarrangedsupportpivotsresultsinlowwithin-batchvariabilityintheenergyabsorbedbyasetofpanelsuptoaspecifiedcentraldeflection.Theuseofroundpanelsalsoeliminatesthesawingthatisrequiredtoprepareshotcretebeamspecimens.Thenominaldimensionsofthepanelare75mminthicknessand800mmindiameter.Thicknesshasbeenshowntostronglyinfluencepanelperformanceinthistest,whilevariationsindiameterhavebeenshowntoexertaminorinfluenceonperformance.Correctionfactorsareprovidedtoaccountforactualmeasureddimensions.Note28212;Thetargetdimensionsofthepanelspecimenusedinthistestareheldconstantregardlessofthecharacteristicsofaggregateandfibersusedintheconcretecomprisingthespecimen.Post-crackperformancemaybeinfluencedbysizeandboundaryeffectsiflargeaggregateparticlesorlongfibersareusedintheconcrete.Theseinfluencesareacknowledgedandacceptedinthistestmethodbecauseissuesofsizeeffectandfiberalignmentariseinactualstructuresandnosingletestspecimencansuitablymodelstructuresofallsizes.Differencesinpost-crackbehaviorexhibitedinthistestmethodcanbeexpectedrelativetocastfiber-reinforced........
【中国标准分类号】:Q23
【国际标准分类号】:91_100_40
【页数】:14P.;A4
【正文语种】:英语
【英文标准名称】:StandardPracticeforConductingTestsonSealantsUsingArtificialWeatheringApparatus
【原文标准名称】:用人工老化仪对密封件进行传导试验的标准实施规范
【标准号】:ASTMC1442-1999
【标准状态】:作废
【国别】:美国
【发布日期】:1999
【实施或试行日期】:
【发布单位】:美国材料与试验协会(ASTM)
【起草单位】:ASTM
【标准类型】:()
【标准水平】:()
【中文主题词】:光化辐射;人工加速老化;耐久性;加速老化;曝光;风化;温度;密封件;紫外线辐射;紫外线;光
【英文主题词】:weathering;actinicradiation;artificialacceleratedweathering;durability;sealant;uv-radiation;light;temperature;ultraviolet;acceleratedweathering;exposure
【摘要】:
【中国标准分类号】:H25
【国际标准分类号】:91_100_50
【页数】:3P;A4
【正文语种】:英语
