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:D2095?96(Reapproved2015)StardTestMethodfTensileStrengthofAdhesivesbyMeansofBarRodSpecimens1ThisstardisissuedunderthefixeddesignationD2095thenumberimmediatelyfollowingthedesignationindicatestheyearofiginaladop

2、tioninthecaseofrevisiontheyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperepsilon()indicatesaneditialchangesincethelastrevisionreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofther

3、elativetensilestrengthofadhesivesbytheuseofbarrodshapedbuttjoinedspecimensunderdefinedconditionsofpreparationconditioningtesting.Thistestmethodisapplicabletothetestingofadhesiveswithvariousadherendmaterialsineithersimila

4、rdissimilarcombinations.NOTE1—AnalternativetestmethodfdeterminingthetensilestrengthofadhesivesisTestMethodD897.1.2ThevaluesstatedinSIunitsaretoberegardedasthestard.Thevaluesgiveninparenthesesarefinfmationonly.1.3Thisstar

5、ddoesnotpurpttoaddressallofthesafetyconcernsifanyassociatedwithitsuse.Itistheresponsibilityoftheuserofthisstardtoestablishappropriatesafetyhealthpracticesdeterminetheapplicabilityofregulatylimitationspritouse.2.Reference

6、dDocuments2.1ASTMStards:2D897TestMethodfTensilePropertiesofAdhesiveBondsD907TerminologyofAdhesivesD2094PracticefPreparationofBarRodSpecimensfAdhesionTestsE4PracticesfFceVerificationofTestingMachinesE6TerminologyRelatingt

7、oMethodsofMechanicalTestingE104PracticefMaintainingConstantRelativeHuitybyMeansofAqueousSolutions3.Terminology3.1ManyofthetermsinthisstardaredefinedinTerminologyD907.3.2DefinitionsofTermsSpecifictoThisStard:3.2.1tensiles

8、trengthofanadhesiven—themaximumtensilestresswhichitiscapableofsustaining.Tensilestrengthiscalculatedfromthemaximumloadduringatensiontestcarriedtorupturetheiginalcrosssectionalareaofthespecimen(seeTerminologyE6).4.Signifi

9、canceUse4.1Tensiontestsprovidereasonablyaccurateinfmationwithregardtothetensilestrengthofadhesives.Tensilestrengthdatamaybesuitablefspecificationacceptanceserviceevaluationmanufacturingcontrolresearchdevelopment.Tensiont

10、estsarenotconsideredsignificantfapplicationsdifferingfromthetestinratedirectiontypeofloading.5.Apparatus5.1TestingMachine—Atestingmachinecapableofmaintainingaspecifiedrateofloadingwiththeerrfindicatedloadsthataretobemeas

11、urednotexceeding61%theloadindicatingmechanismessentiallyfreeofinertiallagataspecifiedrateofloading.VerifytheaccuracyofthetestingmachineinaccdancewithPracticesE4.Ensurethatthetestingmachineisprovidedwiththefollowing:5.1.1

12、FixedMember—Afixedessentiallystationarymembercarryingoneattachmentfixture.5.1.2MovableMember—Amovablemembercarryingasecondattachmentfixture.5.1.3AttachmentFixtures—Selfaligningtypefixturesfholdingaspecimenbetweenthefixed

13、memberthemovablemember.Ensurethatthefixturesareattachedtothefixedmovablemembersinsuchawaythattheywillmoveintoalignmentassoonasloadisappliedsothatthelongaxisofthetestspecimenwillcoincidewiththedirectionoftheappliedload.Ad

14、esignffixturesthathasprovensatisfactyisshowninFig.1Fig.2.5.2ConditioningRoomDesiccats—Aconditioningroomcapableofmaintainingarelativehuityof5062%at2361C(73.461.8F)desiccatscontainingasaturatedsaltsolution(Note2)togivethes

15、amerelativehuitytemperature.NOTE2—Asaturatedsaltsolutionofcalciumnitratewillgiveapproximately51%relativehuityat24.5C(seePracticeE104).1ThistestmethodisunderthejurisdictionofASTMCommitteeD14onAdhesivesisthedirectresponsib

16、ilityofSubcommitteeD14.80onMetalBondingAdhesives.CurrenteditionapprovedApril12015.PublishedApril2015.iginallyapprovedin1962.Lastpreviouseditionapprovedin2008asD2095–96(2008).DOI:10.1520D209596R15.2FreferencedASTMstardsvi

17、sittheASTMwebsitewww.astm.gcontactASTMCustomerServiceat.FAnnualBookofASTMStardsvolumeinfmationrefertothestard’sDocumentSummarypageontheASTMwebsite.Copyright?ASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194

18、282959.UnitedStates1megapalspersquarecentimetre(poundspersquareinch)ifpossiblerepttothreesignificantfigures.9.2Feachseriesoftestscalculatethearithmeticmeanofallvaluesobtainedreptthisvalueastheaveragetensilestrength.9.3If

19、itisdesiredtodeterminethestarddeviationcoefficientofvariationcalculatethesevaluesasfollowsrepttotwosignificantfigures:s5=~(X22nX2!~n21!v5100sXwhere:s=estimatedstarddeviationX=valueofasingleobservationn=numberofobservatio

20、nsX=arithmeticmeanofthesetofobservationsv=estimatedcoefficientofvariation.10.Rept10.1Reptthefollowinginfmation:10.1.1Completeidentificationoftheadhesivetestedincludingtypesourcemanufacturer’scodenumberfmetc.10.1.2Identif

21、icationofmaterialsusedasadherendsmethodofsurfacepreparationused10.1.3Typeofspecimen(rodbar)useddimensionsofedsheetmaterialifany10.1.4Methodofapplicationofadhesivedryingprecurecureconditionsused10.1.5Averagethicknessofadh

22、esivelayerafterfmationofthejointwithin0.025mm(0.001in.).Describethemethodofobtainingthethicknessoftheadhesivelayerincludingprocedurelocationofmeasurementsrangeofmeasurements10.1.6Whethernotflashwasremovedmethodemployedif

23、any10.1.7Conditioningprocedureused10.1.8Testroomconditionstemperatureofspecimensattimeoftest10.1.9Numberofspecimenstested10.1.10Speedoftesting10.1.11Anaveragevalueofthetensilestrength.Alsoanaveragevalueofthepercentageofe

24、achtypeoffailurethatisadhesioncohesioncontactadherendfailure.11.PrecisionBias11.1Aprecisionbiasstatementdoesnotexistfthistestmethodbecauseresourcesnecessaryfroundrobintestinghavenotbeenfthcoming.ASTMInternationaltakesnop

25、ositionrespectingthevalidityofanypatentrightsassertedinconnectionwithanyitemmentionedinthisstard.Usersofthisstardareexpresslyadvisedthatdeterminationofthevalidityofanysuchpatentrightstheriskofinfringementofsuchrightsaree

26、ntirelytheirownresponsibility.Thisstardissubjecttorevisionatanytimebytheresponsibletechnicalcommitteemustbereviewedeveryfiveyearsifnotrevisedeitherreapprovedwithdrawn.Yourcommentsareinvitedeitherfrevisionofthisstardfaddi

27、tionalstardsshouldbeaddressedtoASTMInternationalHeadquarters.Yourcommentswillreceivecarefulconsiderationatameetingoftheresponsibletechnicalcommitteewhichyoumayattend.Ifyoufeelthatyourcommentshavenotreceivedafairhearingyo

28、ushouldmakeyourviewsknowntotheASTMCommitteeonStardsattheaddressshownbelow.ThisstardiscopyrightedbyASTMInternational100BarrHarbDrivePOBoxC700WestConshohockenPA194282959UnitedStates.Individualreprints(singlemultiplecopies)

29、ofthisstardmaybeobtainedbycontactingASTMattheaboveaddressat6108329585(phone)6108329555(fax)(email)throughtheASTMwebsite(www.astm.g).PermissionrightstophotocopythestardmayalsobesecuredfromtheCopyrightClearanceCenter222Ros

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