DIN IEC 60068-2-18-1991 电器技术.基本环境试验规程.试验.试验R和导则:水

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【英文标准名称】:StandardTestMethodsforDeterminationofFractureToughnessofAdvancedCeramicsatAmbientTemperature
【原文标准名称】:室温下高级陶瓷断裂韧性测定的标准试验方法
【标准号】:ASTMC1421-2009
【标准状态】:现行
【国别】:美国
【发布日期】:2009
【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】:C28.01
【标准类型】:(TestMethod)
【标准水平】:()
【中文主题词】:
【英文主题词】:advancedceramics;chevronnotch;fracturetoughness;precrackedbeam;surfacecrackinflexure;Advancedceramics;Ambienttemperature;Chevronnotchedspecimen;Cracking--ceramics;Flexuraltesting--ceramics;Fracturetesting--advancedceramics;Precrac
【摘要】:Fracturetoughness,KIc,isameasureoftheresistancetocrackextensioninabrittlematerial.Thesetestmethodsmaybeusedformaterialdevelopment,materialcomparison,qualityassessment,andcharacterization.Thepbandthevbfracturetoughnessvaluesprovideinformationonthefractureresistanceofadvancedceramicscontaininglargesharpcracks,whilethescfracturetoughnessvalueprovidesthisinformationforsmallcrackscomparableinsizetonaturalfracturesources.Cracksofdifferentsizesmaybeusedforthescmethod.IfthefracturetoughnessvaluesvaryasafunctionofthecracksizeitcanbeexpectedthatKIscwilldifferfromKIpbandKIvb.1.1Thesetestmethodscoverthefracturetoughness,KIc,determinationofadvancedceramicsatambienttemperature.ThemethodsdetermineKIpb(precrackedbeamtestspecimen),KIsc(surfacecrackinflexure),andKIvb(chevron-notchedbeamtestspecimen).Thefracturetoughnessvaluesaredeterminedusingbeamtestspecimenswithasharpcrack.Thecrackiseitherastraight-throughcrackformedviabridgeflexure(pb),orasemi-ellipticalsurfacecrackformedviaKnoopindentation(sc),oritisformedandpropagatedinachevronnotch(vb),asshowninFig.1.Note18212;Thetermsbend(ing)andflexurearesynonymousinthesetestmethods.1.2ThesetestmethodsareapplicabletomaterialswitheitherflatorwithrisingR-curves.Differencesintestprocedureandanalysismaycausethevaluesfromeachtestmethodtobedifferent.Formanymaterials,suchasthesiliconnitrideStandardReferenceMaterial2100,thethreemethodsgiveidenticalresultsatroomtemperatureinambientair.1.3Thefracturetoughnessvaluesforamaterialcanbefunctionsofenvironment,testrateandtemperature.Thesetestmethodsgivefracturetoughnessvaluesforspecificconditionsofenvironment,testrateandtemperature.1.4Thesetestmethodsareintendedprimarilyforusewithadvancedceramicswhicharemacroscopicallyhomogeneous.Certainwhisker-orparticle-reinforcedceramicsmayalsomeetthemacroscopicbehaviorassumptions.Singlecrystalsmayalsobetested.1.5Thisstandardbeginswithamainbodythatprovidesinformationonfracturetoughnesstestingingeneral.Itisfollowedbyannexesandappendiceswithspecificinformationfortheparticulartestmethods.MainBody
Section
Scope
1
ReferencedDocuments
2
Terminology(includingdefinitions,orientationandsymbols)
3
SummaryofTestMethods
4
SignificanceandUse
5
Interferences
6
Apparatus
7
TestSpecimenConfigurations,DimensionsandPreparations
8
GeneralProcedures
【英文标准名称】:Shipsandmarinetechnology-Marineradarreflectors(ISO8729:1997);GermanversionENISO8729:1998
【原文标准名称】:造船和海上技术.海上雷达反光镜
【标准号】:DINENISO8729-1999
【标准状态】:作废
【国别】:德国
【发布日期】:1999-01
【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】:设计;作标记;定义;检验;雷达设备;特性;安装;规范(验收);试验;海船;小型船舶;规范;雷达反射器;性能要求;海轮;效率;水路运输;合格试验;最低要求;反光镜;附件;船舶设备;造船
【英文主题词】:Attachment;Definitions;Design;Efficiency;Inspection;Installations;Marinenavigation;Marking;Minimumrequirements;Navigation;Navigationinstruments;Offshoreengineering;Performancerequirements;Properties;Qualificationtests;Radar;Radarequipment;Radarreflectors;Reflectors(light);Reflexion;Sea-goingships;Shipbuilding;Ships;Ship'sequipment;Smallcraft;Specification(approval);Specifications;Testing;Watertransport
【摘要】:
【中国标准分类号】:U65
【国际标准分类号】:47_020_70
【页数】:8P.;A4
【正文语种】:德语