2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、Designation:D3433?99(Reapproved2012)StardTestMethodfFractureStrengthinCleavageofAdhesivesinBondedMetalJoints1ThisstardisissuedunderthefixeddesignationD3433thenumberimmediatelyfollowingthedesignationindicatestheyearofigin

2、aladoptioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethod(12345)2coversthedeter

3、minationoffracturestrengthincleavageofadhesiveswhentestedonstardspecimensunderspecifiedconditionsofpreparationtesting(Note1).1.2Thistestmethodisusefulinthatitcanbeusedtodevelopdesignparametersfbondedassemblies.NOTE1—Whil

4、ethistestmethodisintendedfuseinmetaltometalapplicationsitmaybeusedfmeasuringfracturepropertiesofadhesivesusingplasticadherendsprovidedconsiderationisgiventothethicknessrigidityoftheplasticadherends.1.3ThevaluesstatedinSI

5、unitsaretoberegardedasthestard.Thevaluesgiveninparenthesesarefinfmationonly.1.4Thisstarddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriate

6、safetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.ReferencedDocuments2.1ASTMStards:3A167SpecificationfStainlessHeatResistingChromiumNickelSteelPlateSheetStrip(Withdrawn2014)4A366A366MSpecifica

7、tionfCommercialSteel(CS)SheetCarbon(0.15MaximumPercent)ColdRolled(Withdrawn2000)4B36B36MSpecificationfBrassPlateSheetStripRolledBarB152B152MSpecificationfCopperSheetStripPlateRolledBarB209SpecificationfAluminumAluminumAl

8、loySheetPlateB265SpecificationfTitaniumTitaniumAlloyStripSheetPlateD907TerminologyofAdhesivesE4PracticesfFceVerificationofTestingMachinesE399TestMethodfLinearElasticPlaneStrainFractureToughnessKIcofMetallicMaterials3.Ter

9、minology3.1Definitions:ManyofthetermsusedinthistestmethodaredefinedinTerminologyD907.3.2DefinitionsofTermsSpecifictoThisStard:3.2.1crackextensionfceG—thesystemisolated(fixedloaddisplacement)lossofstressfieldenergyfaninfi

10、nitesimalincreasedAofseparationalarea.InequationfmGdA52dUT(1)whereUT=totalelasticenergyinthesystem(componenttestspecimen).InthetestspecimensofthismethodthecrackfrontisnearlystraightthroughthespecimenthicknessBsothatdA=Bd

11、awheredaisaninfinitesimalfwardmotionoftheleadingedgeofthecrack.Completelylinearelasticbehaviisassumedinthecalculations(SeeAnnexA1)ofGusedinthismethodanallowableassumptionwhenthezoneofnonlineardefmationintheadhesiveissmal

12、lrelativetospecimendimensionscracksize.3.2.1.1Whentheshearstressontheplaneofcrackfwardtoitsleadingedgeiszerothestressstateistermed“openingmode.”ThesymbolfanopeningmodeGisGIfplanestrainG1whentheconnotationofplanestrainisn

13、otwanted.3.2.2openingmodefracturetoughnessG1c—thevalueofGjustpritoonsetofrapidfracturingwhenGisincreasingwithtime.3.2.3openingmodecrackarresttoughnessG1a—thevalueofGjustafterarrestofarunarrestsegmentofcrackextension.3.2.

14、3.1Itisassumedthatthedimensionsofthepartcontainingthecrackarelargecomparedtotherunarrestsegment1ThistestmethodisunderthejurisdictionofASTMCommitteeD14onAdhesivesisthedirectresponsibilityofSubcommitteeD14.80onMetalBonding

15、Adhesives.CurrenteditionapprovedOct.12012.PublishedOctober2012.iginallyapprovedin1975.Lastpreviouseditionapprovedin2005asD3433–99(2005).DOI:10.1520D343399R12.2Theboldfacenumbersinparenthesesrefertothereferencesattheendof

16、thistestmethod.3FreferencedASTMstardsvisittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.4Thelastapprovedversionofthishisti

17、calstardisreferencedonwww.astm.g.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959.UnitedStates17.4Testatleasttwelvespecimensrepresentingatleastfourdifferentjoints.NOTE3—Sinceitisunacceptabl

18、etoexceedtheyieldpointofthemetalinflexureduringtestthepermissiblethicknessofthespecimenwillvarywithtypeofmetalthegenerallevelofstrengthoftheadhesivebeinginvestigated.Theminimumpermissiblethicknessinaunifmsymmetricaladher

19、endmaybecomputedfromthefollowingrelationship:h5?6TaBFty(2)where:h=thicknessofmetalnmaltoplaneofbondingmm(in.)Fty=tensileyieldpointofmetal(thestressatproptionallimit)MPa(psi)T=150%ofthemaximumloadtostartthecrackintheadhes

20、ivebondN(lbf)a=cracklengthatmaximumloadmm(in.)B=bondwidthmm(in.).8.PreparationofTestJoints8.1Cutsheetsofthemetalscontouredadherendsprescribedin7.1–7.3torecommendedsize(Figs.23).Alledgesofthemetalpanelsspecimensmustbeflat

21、freeofburrssmooth(4.1m(160in.)maximum)befethepanelsaresurfacetreatedbonded.Cleantreatdrythesheetscontouredadherendscarefullyinaccdancewiththeprocedureprescribedbythemanufactureroftheadhesive.Prepareapplytheadhesiveinaccd

22、ancewiththerecommendationsofthemanufactureroftheadhesive.Applytheadhesivetothefayingsurfaceofonebothmetalsheets.Thenassemblethesheetsfayingsurfacetofayingsurfaceinpairsallowtheadhesivetocureunderconditionsprescribedbythe

23、manufactureroftheadhesive.8.2Itisrecommendedthateach“flatadherend”testjointbemadewithsufficientareatoprovideatleastfivetestspecimens.9.PreparationofTestSpecimens9.1FflatadherendtestspecimenstrimjointareainaccdancewithFig

24、.2.ThencuttestspecimensasshowninFig.1fromthejointsFig.2(Note4).ThencutholesfloadpinsasshowninFig.1.9.2Contoureddoublecantileverspecimensarereadyftestasbonded.NOTE4—Donotuselubricantsoilsduringthecuttingprocess.FFIG.1Flat

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