DIN 41690-1970 微型熔断器.带法兰背面接线、带E16圆螺纹旋入式、10A,250V熔断器底座

上一篇: BS 2L 128-1970 镁-锌-铈-锆合金(沉淀处理)铸锭和铸件规范(Zn4.5、稀土金属1.2、Zr0.7)
下一篇: ASME PTC 19.11-1970 装置和仪器.第11部分:动力循环中的水和蒸汽(纯度和质量.泄漏检验和测量)

【英文标准名称】:Methodsoftestformasonryunits-Part4:Determinationofrealandbulkdensityandoftotalandopenporosityfornaturalstonemasonryunits;GermanversionEN772-4:1998
【原文标准名称】:砖石检验方法.第4部分:天然石圬工件密度、体积密度、整体空隙率以及开口空隙率的测定
【标准号】:EN772-4-1998
【标准状态】:现行
【国别】:
【发布日期】:1998-10
【实施或试行日期】:
【发布单位】:欧洲标准学会(EN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:测定;孔隙率;石;试件;试验条件;天然石料;试验;施工材料;测定;建筑;数学计算;密度;砖石工程;检验;砖;砖砌体工程;负荷;测量;体密度;试验证明书;规范;试验设备;材料试验机
【英文主题词】:Bricks;Bulkdensity;Construction;Constructionmaterials;Density;Determination;Determinations;Inspection;Loading;Masonry;Masonrywork;Materialtestingmachines;Mathematicalcalculations;Measurement;Naturalstones;Porosity;Specification;Stone;Testcertificates;Testequipment;Testpieces;Testing;Testingconditions
【摘要】:
【中国标准分类号】:P24
【国际标准分类号】:91_100_15
【页数】:6P.;A4
【正文语种】:英语


【英文标准名称】:StandardTestMethodforShearModulusatRoomTemperature
【原文标准名称】:室温下剪切模量的标准试验方法
【标准号】:ASTME143-2002(2008)
【标准状态】:现行
【国别】:美国
【发布日期】:2002
【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】:E28.04
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:shearmodulus;stress-straindiagram;torque-twistdiagram;Angleoftwist;Copperalloypipe;Coppertube;Ferrousmetals/alloys;Nonferrousmetals/alloys;Shearmodulus;Steel;Steelpipe;Straintesting--metallicmaterials;Stress--metallicmaterials;
【摘要】:ShearmodulusisamaterialpropertyusefulincalculatingcomplianceofstructuralmaterialsintorsionprovidedtheyfollowHooke''slaw,thatis,theangleoftwistisproportionaltotheappliedtorque.Examplesoftheuseofshearmodulusareinthedesignofrotatingshaftsandhelicalcompressionsprings.Note38212;Formaterialsthatfollownonlinearelasticstress-strainbehavior,thevalueoftangentorchordshearmodulusisusefulforestimatingthechangeintorsionalstraintocorrespondingstressforaspecifiedstressorstress-range,respectively.Suchdeterminationsare,however,outsidethescopeofthisstandard.(SeeforexampleRef(1).)Theproceduralstepsandprecisionoftheapparatusandthetestspecimensshouldbeappropriatetotheshapeandthematerialtype,sincethemethodappliestoawidevarietyofmaterialsandsizes.Precisedeterminationofshearmodulusdependsonthenumerousvariablesthatmayaffectsuchdeterminations.Thesefactorsincludecharacteristicsofthespecimensuchasresidualstress,concentricity,wallthicknessinthecaseoftubes,deviationfromnominalvalue,previousstrainhistoryandspecimendimension.Testingconditionsthatinfluencetheresultsinclude:axialpositionofthespecimen,temperatureandtemperaturevariations,andmaintenanceoftheapparatus.Interpretationofdataalsoinfluencesresults.1.1Thistestmethodcoversthedeterminationofshearmodulusofstructuralmaterials.Thistestmethodislimitedtomaterialsinwhich,andtostressesatwhich,creepisnegligiblecomparedtothestrainproducedimmediatelyuponloading.Elasticpropertiessuchasshearmodulus,Young''smodulus,andPoisson''sratioarenotdeterminedroutinelyandaregenerallynotspecifiedinmaterialsspecifications.Precisionandbiasstatementsforthesetestmethodsarethereforenotavailable.1.2Units8212;Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.3Thisstandardmayinvolvehazardousmaterials,operations,andequipment.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_040_10
【页数】:5P.;A4
【正文语种】:英语