ASTM D4482-2007 橡胶特性-伸展周期疲劳的标准试验方法

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【英文标准名称】:StandardTestMethodforRubberProperty-ExtensionCyclingFatigue
【原文标准名称】:橡胶特性-伸展周期疲劳的标准试验方法
【标准号】:ASTMD4482-2007
【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】:D11.15
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:炭黑;延伸;疲劳;天然橡胶;特性;橡胶;合成橡胶;测试
【英文主题词】:fatigue;fatiguelife;strainenergy
【摘要】:Thistestmethodcoversoneprocedurefordeterminingfatiguelifeatvariousextension-ratios.Thestraincycleischaracteristicofthetypeoftestapparatusspecified.Experienceinfatiguetestingshowsthatfatiguelifemayhaveawide,non-normaldistributionand,therefore,alargestandarddeviationthatiscompounddependent.Naturalrubber,forexample,hasshownanarrowerdistributionthanmanysyntheticrubbers.Alargenumberofspecimensmay,therefore,berequiredtoyieldthedesiredprecision.Comparisonofdifferentrubbercompoundsshouldbemadewithdueconsiderationtothestandarddeviationforeach(see7.1).Fatiguedata,asgeneratedinthistestmethod,giveprimarilyanestimateofthecrackinitationbehaviorofarubbervulcanizateandonlyaveryapproximatemeasureofthecrackpropagationrate.Theinformationobtainedmaybeusefulinpredictingtheflex-lifeperformanceofacompoundinactiveservice;however,theusershouldbeawarethatinactualuse,productsaresubjectedtomanyotherfatiguefactorsnotmeasuredinthistestmethod.1.1Thistestmethodcoversthedeterminationoffatiguelifeofrubbercompoundsundergoingatensile-straincycle.Duringpartofthecycle,thestrainisrelaxedtoazerovalue.Thespecimensaretestedwithoutintentionallyinitiatedflaws,cuts,orcracks.Failureisindicatedbyacompleteruptureofthetestspecimen.1.2Noexactcorrelationbetweenthesetestresultsandserviceisgivenorimplied.Thisisduetothevariednatureofserviceconditions.Thesetestproceduresdoyielddatathatcanbeusedforthecomparativeevaluationofrubbercompoundsfortheirabilitytoresist(dynamic)extensioncyclingfatigue.1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.
【中国标准分类号】:G34
【国际标准分类号】:83_060
【页数】:9P.;A4
【正文语种】:


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【英文标准名称】:Multilayerpipingsystemsforhotandcoldwaterinstallationsinsidebuildings-Part5:Fitnessforpurposeofthesystem(ISO21003-5:2008);EnglishversionofDINENISO21003-5:2008-11
【原文标准名称】:建筑物内冷热水装置用多层管道系统.第5部分:系统的适用性
【标准号】:DINENISO21003-5-2008
【标准状态】:现行
【国别】:德国
【发布日期】:2008-11
【实施或试行日期】:
【发布单位】:德国标准化学会(DE-DIN)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:应用;建筑物;分类;冷水;冷水管;适用性;加热系统;加热设备;热水;热水集中供暖;家用(安装)设备;装置;材料;多层系统;使用条件;聚丁烯;PE-X;管道配件;管道装置;管道;管;管系统;塑料管道;塑料管;塑料;聚酯树脂;聚乙烯;聚合材料;聚丙烯;聚氯乙烯;饮用水;PP;PVC-C;建筑物服务设施;可用水;规范(验收);测试;热环境系统;温水;水;输水管道;水常规;给水;给水设施
【英文主题词】:Applications;Buildings;Classification;Coldwater;Coldwaterconduit;Fitnessforpurpose;Heatedsystems;Heatingequipment;Hotwater;Hot-watercentralheating;Houseinstallations;Installations;Materials;Multilayersystem;Operatingconditions;PB;PE-X;Pipefittings;Pipelineinstallations;Pipelines;Pipes;Pipingsystem;Plasticpipelines;Plasticpipes;Plastics;Polyesterresins;Polyethylene;Polymericmaterials;Polypropylene;Polyvinylchloride;Potablewater;PP;PVC-C;Serviceinstallationsinbuildings;Servicewater;Specification(approval);Testing;Thermalenvironmentsystems;Warmwater;Water;Waterpipelines;Waterpractice;Watersupply;Watersupplyinstallations
【摘要】:ThispartofISO21003specifiesthecharacteristicsforthefitnessforpurposeofmultilayerpipingsystemsintendedtobeusedforhotandcoldwaterinstallationsinsidebuildingsfortheconveyanceofwater--whetherornotthewaterisintendedforhumanconsumption(domesticsystems)orforheatingsystems--underspecifieddesignpressuresandtemperaturesappropriatetotheclassofapplication(seeTable1ofISO21003:2008).ItalsospecifiesthetestparametersforthetestmethodsreferredtointhispartofISO21003.ISO21003isareferenceproductstandard.Itisapplicabletomultilayerpipes,fittings,theirjoints,andalsotojointswithcomponentsmadeofotherplasticsandnon-plasticsmaterialsintendedtobeusedforhotandcoldwaterinstallations.ThispartofISO21003isintendedforuseonlyinconjunctionwithalltheotherpartsofISO21003.ISO21003coversarangeofserviceconditions(applicationclasses)anddesignpressures.Itisnotapplicableforvaluesofdesigntemperature,TD,maximumdesigntemperature,/'max,andmalfunctiontemperature,TmaI,inexcessofthoseinTable1ofISO21003-1:2008.NOTE1Itistheresponsibilityofthepurchaserorspecifiertomaketheappropriateselectionsfromtheseaspects,takingintoaccounttheirparticularrequirementsandanyrelevantnationalregulationsandinstallationpracticesorcodes.Thepolymericmaterialsusedforthestress-designedlayersarethefollowing:polybutylene(PB),polyethyleneofraisedtemperatureresistance(PE-RT),crosslinkedpolyethylene(PE-X),polypropylene(PP)andchlorinatedpoly(vinylchloride)(PVC-C).ThePE-Xusedshallbefullycrosslinkedandshallcomplywiththerequirementsoftherelevantreferenceproductstandard(ISO15875).NOTE2ForthepurposesofthisISO21003,crosslinkedpolyethylene(PE-X)aswellasadhesivesareconsideredasthermoplasticmaterials.
【中国标准分类号】:Q81;P40
【国际标准分类号】:91_140_60
【页数】:17P.;A4
【正文语种】:英语


【英文标准名称】:Aerospace;countersunkheadscrews,withribbedTORQ-SET(ACR)recessandMJthread,fullythreaded,titaniumalloy;nominaltensilestrength1100MPa,fortemperaturesupto315°C
【原文标准名称】:航空航天.公称抗拉强度1100MPa.使用温度在315℃以下钛合金制全攻螺纹MJ螺纹的带肋翼的扭矩调节十字槽沉头螺钉
【标准号】:DIN65558-1989
【标准状态】:现行
【国别】:德国
【发布日期】:1989-09
【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】:航天运输;材料;作标记;合金;航空航天运输;尺寸;埋头紧固件;钛;十字头紧固件;抗拉强度;肋状的;验收规范;表面处理;螺钉;螺纹;质量(物质);紧固件;航空运输;沉头螺钉;钛合金;固定力矩十字形槽
【英文主题词】:
【摘要】:
【中国标准分类号】:V20
【国际标准分类号】:49_030_20
【页数】:4P;A4
【正文语种】:德语