EN ISO 14268-2002 皮革.物理和机械试验.水蒸气渗透性测定
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【英文标准名称】:Leather-Physicalandmechanicaltests-Determinationofwatervapourpermeability(ISO14268:2002);GermanversionENISO14268:2002
【原文标准名称】:皮革.物理和机械试验.水蒸气渗透性测定
【标准号】:ENISO14268-2002
【标准状态】:现行
【国别】:
【发布日期】:2003-10
【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】:皮革制品;皮肤;试样制备;水蒸气渗透性;皮革;蒸汽;材料试验;物理试验;机械试验;试样;抽样方法;样品;试验
【英文主题词】:Leather;Leatherproducts;Materialstesting;Mechanicaltesting;Physicaltesting;Samplingmethods;Skin(body);Specimenpreparation;Specimens;Steam;Testspecimens;Testing;Watervapourpermeability
【摘要】:
【中国标准分类号】:Y45
【国际标准分类号】:59_140_30
【页数】:12P.;A4
【正文语种】:英语
【英文标准名称】:Quartzcrystalcontrolledoscillatorsofassessedquality-Part4-1:Blankdetailspecification-Capabilityapproval
【原文标准名称】:经质量评定的石英晶体振荡器第4-1部分:空白详细规范能力批准
【标准号】:IEC60679-4-1-1998
【标准状态】:现行
【国别】:国际
【发布日期】:1998-02
【实施或试行日期】:
【发布单位】:国际电工委员会(IX-IEC)
【起草单位】:IEC/TC49
【标准类型】:()
【标准水平】:()
【中文主题词】:尺寸;详细规范;电气工程;空白格式;电子设备及元件;能力鉴定;石英晶体控制振荡器
【英文主题词】:Blankforms;Capabilityapproval;Detailspecification;Dimensions;Electricalengineering;Electronicequipmentandcomponents;Marking;Oscillators;Piezoelectricdevices;Quality;Quartzcrystalcontrolledoscillators;Testingconditions;Testingrequirements
【摘要】:Quartzcrystalcontrolledoscillatorsofassessedquality-Part4-1:Blankdetailspecification-Capabilityapproval1Ratings(see2.3ofIEC60679-1forpreferredratings)2Characteristics(see2.2ofIEC60679-1)3Marking4Orderinginformation5Certifiedtestrecords6Additionalinformation(notforinspectionpurposes)7Inspectionrequirements
【中国标准分类号】:L21
【国际标准分类号】:31_140
【页数】:23P.;A4
【正文语种】:英语
【英文标准名称】:StandardTestMethodforTensileStrain-HardeningExponents(n-Values)ofMetallicSheetMaterials
【原文标准名称】:金属薄板材拉伸应变硬化指数(n值)的标准试验方法
【标准号】:ASTME646-2007
【标准状态】:现行
【国别】:
【发布日期】:2007
【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】:E28.02
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:指数;机械测试;金属;薄板材;拉伸应变;测试
【英文主题词】:
【摘要】:Thistestmethodisusefulforestimatingthestrainattheonsetofneckinginauniaxialtensiontest(1).Practically,itprovidesanempiricalparameterforappraisingtherelativestretchformabilityofsimilarmetallicsystems.Thestrain-hardeningexponentisalsoameasureoftheincreaseinstrengthofamaterialduetoplasticdeformation.Thestrain-hardeningexponentmaybedeterminedovertheentireplasticstress-straincurveoranyportion(s)ofthestress-straincurvespecifiedinaproductspecification.Note38212;Thestraininterval10x2013;20%iscommonlyutilizedfordeterminingthen-valueofformablelowcarbonsteelproducts.Thistestmethodisnotintendedtoapplytoanyportionofthetrue-stressversustrue-straincurvethatexhibitsdiscontinuousbehavior;however,themethodmaybeappliedbycurve-smoothingtechniquesasagreedupon.Note48212;Forexample,thoseportionsofthestress-straincurvesformildsteeloraluminumalloyswhichexhibityield-pointelongationorLuuml;dersbandsmaybecharacterizedasbehavingdiscontinuously.Note58212;Cautionshouldbeobservedintheuseofcurve-smoothingtechniquesastheymayaffectthen-value.Thistestmethodissuitablefordeterminingthetensilestress-strainresponseofmetallicsheetmaterialsintheplasticregionpriortotheonsetofnecking.Then-valuemayvarywiththedisplacementrateorstrainrateused,dependingonthemetalandtesttemperature.1.1Thistestmethodcoversthedeterminationofastrain-hardeningexponentbytensiontestingofmetallicsheetmaterialsforwhichplastic-flowbehaviorobeysthepowercurvegivenintheIntroduction.Note18212;Asinglepowercurvemaynotfittheentirestress-straincurvebetweenyieldandnecking.Ifsuchisthecase,morethanonevalueofthestrain-hardeningexponentcanbeobtained(2).1.2Thistestmethodisformetallicsheetmaterialswiththicknessesofatleast0.005in.(0.13mm)butnotgreaterthan0.25in.(6.4mm).1.3Thevaluesstatedininch-poundunitsaretoberegardedasthestandard.TheSIequivalentsshownmaybeapproximate.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:H22
【国际标准分类号】:77_140_50
【页数】:9P.;A4
【正文语种】:
