EN 658-5-2002 en Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Part 5 Determination of interlaminar shear strength by short span b.pdf

1、BRITISH STANDARD BS EN 658-5:2002 Advanced technical ceramics Mechanical properties of ceramic composites at room temperature Part 5: Determination of interlaminar shear strength by short span bend test (three points) The European Standard EN 658-5:2002 has the status of a British Standard ICS 81.06

2、0.30 BS EN 658-5:2002 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 28 February 2003 BSI 28 February 2003 ISBN 0 580 41348 9 National foreword This British Standard is the official English language version of EN 658-5:2002. It supersedes DD

3、 ENV 658-5:1993 which is withdrawn. The UK participation in its preparation was entrusted to Technical Committee RPI/13, Advanced technical ceramics, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references T

4、he British Standards which implement international or European publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standa

5、rds Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the r

6、esponsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front

7、 cover, the EN title page, pages 2 to 9 and a back cover. The BSI copyright date displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN6585 December2002 ICS81.060.30 Supersede

8、sENV6585:1993 Englishversion AdvancedtechnicalceramicsMechanicalpropertiesofceramic compositesatroomtemperaturePart5:Determinationof interlaminarshearstrengthbyshortspanbendtest(three points) CramiquestechniquesavancesPropritsmcaniques descramiquescompositestempratureambiante Partie5:Dterminationdel

9、arsistanceaucisaillement interlaminaireparessaideflexionsurappuisrapprochs (troispoints) HochleistungskeramikMechanischeEigenschaftenvon keramischenVerbundwerkstoffenbeiRaumtemperatur Teil5:BestimmungderScherfestigkeitimDreiPunkt BiegeversuchmitkurzemAuflagerabstand ThisEuropeanStandardwasapprovedby

10、CENon16October2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManag

11、ementCentreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstan

12、dardsbodiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:

13、ruedeStassart,36B1050Brussels 2002CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN6585:2002EEN6585:2002(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Principle4 4 Terms,definitionsandsymbols .4 5 Apparatus .5 5.1 Testmachine 5 5.2

14、 Testjig .5 5.3 Dimensionmeasuringdevices . 6 6 Testspecimens 6 7 Testspecimenpreparation . 6 7.1 Machining .6 7.2 Numberoftestspecimens 6 8 Procedure .6 8.1 Displacementrate . .6 8.2 Measurementoftestspecimens . .6 8.3 Testingtechnique . .7 8.3.1 Testspecimenmounting .7 8.3.2 Measurements7 8.4 Test

15、validity . .7 9 Calculationofresults 7 10 Testreport 8EN6585:2002(E) 3 Foreword Thisdocument(EN6585:2002)hasbeenpreparedbyTechnicalCommitteeCEN/TC184,“Advancedtechnical ceramics“,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanide

16、nticaltextor byendorsement,atthelatestbyJune2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby June2003. ThisdocumentsupersedesENV6585:1993. EN658 AdvancedtechnicalceramicsMechanicalpropertiesofceramiccompositesatroomtemperature hassix parts: Part 1 :Determinationoftensileproperties P

17、art 2 :Determinationofcompressiveproperties Part 3 :Determinationofflexuralstrength Part 4 :Determinationofinterlaminarshearstrengthbycompressionloadingofnotchedtestspecimens Part 5 :Determinationofinterlaminarshearstrengthbyshortspanbendtest(threepoints) Part 6 :Determinationofinterlaminarshearstre

18、ngthbydoublepunchshearing AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portu

19、gal,Spain, Sweden,SwitzerlandandtheUnitedKingdom.EN6585:2002(E) 4 1Scope ThispartofthisEuropeanStandardspecifiestheconditionsfordeterminationoftheinterlaminarshearstrengthof ceramicmatrixcompositematerialswithcontinuousfibrereinforcementatroomtemperature,bysubjectingatest specimentoashortspanbendtes

20、t(threepoints).Thismethodappliestoallceramicmatrixcompositeswitha continuousfibrereinforcementunidirectional(1D)andbidirectional(2D)andtridirectional(xD,with2 x 3)as definedinENV13233. TwoothermethodsforthedeterminationofshearstrengtharegiveninfurtherpartsofEN658. NOTE 1 Theinterlaminarshearcharacte

21、risticscanvarysignificantlydependingontestspecimenpreparationand dimensions,rateofapplicationofthetestforce,surfacecondition,etc NOTE2 However, results obtained by this part of EN 658 cannot be compared with results obtained by the two other methods. NOTE3 Careshouldbeexercisedininterpretingtheresul

22、tsofthemethodtoobtainabsolutevaluesoftheinterlaminarshear strengthofceramicmatrixcompositesfordesignpurposes. 2 Normativereferences ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetext,andthepublica

23、tionsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean Standardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). ENV13233:1998, Advancedtechnical

24、ceramicsCeramiccompositesNotationsandsymbols. ENISO75001:1999, MetallicmaterialsVerificationofstaticuniaxialtestingmachinesPart1: Tension/compressiontestingmachines(ISO75001:1999) . ISO3611, Micrometercallipersforexternalmeasurement. 3Principle Thetestconsistsofmeasuringtheforcerequiredtofractureate

25、stspecimensubjectedtoashortspan,threepoint bendtest.Thegeometryofloadinginthedirectionnormaltotheplies(direction3)andthetestspecimen dimensionsshallbesuchthatfailureoccursintheformofinterlaminarshearinplane(1,2).Thetestisperformedat constantcrossheaddisplacementrate. 4 Terms,definitionsandsymbols Fo

26、rthepurposesofthisEuropeanStandard,thefollowingterms,definitionsandsymbolsandthosegivenin ENV13233:1998apply. 4.1 shearfailureforce, F themaximumforcerequiredtoproduceinterlaminarshearfailurewhentestspecimenissubjectedtothreepoints shortspanbendtestEN6585:2002(E) 5 4.2 interlaminarshearstrength, ILS

27、S b ratiocalculatedonthebasisoftheshearfailureforceandtheshearloadedarea NOTE Thenotation ILSSissupplementedbyasmallletterreferringtothetestmethoddescribed;inthiscase ILSS b forthe interlaminarshearstrengthobtainedfromashortspanbendtest. 5Apparatus 5.1Testmachine Thetestmachineshallbeequippedwithasy

28、stemforrecordingtheforceappliedtothetestspecimen.The machineshallconformtograde1inENISO75001:1999. 5.2Testjig Thetestjigiscomposedoftwoparts,linkedtothefixedandmobilepartsofthemachine.Ithastwooutersupport rollersandoneinnersupportroller. Thecylindricalrollersshallhaveadiameterof4mmto10mm.Theirlength

29、shallbeatleastequaltothewidthof thetestspecimen.Theyshallbemadeofamaterialwithahardnessatleastequaltothatofthetestspecimen.The axesoftherollersshallbeparalleltowithin0,01mm/mm. Theouterrollersshallbefreetorotate(seeFigure1). Tworollersshallbefreetopivotaroundanaxisparalleltothelongitudinaldirectiono

30、fthetestspecimen,inorderto adapttothenonparallelismoftheupperandlowerfacesofunmachinedtestspecimens(seeFigure1). Thedistancebetweenrollersshallbeinaccordancewithclause6. Theinnerrollershallbecentredwithrespecttotheouterrollerstowithin0,2mm. Key 1Pivotingloadingroller 2Rollingandpivotingsupportroller

31、 3Rollingbutnonpivotingsupportroller Figure1TestjigEN6585:2002(E) 6 5.3Dimensionmeasuringdevices Devicesusedformeasuringlineardimensionsofthetestspecimenshallbeaccurateto 0,1mm.Micrometres shallbeinaccordancewithISO3611. 6 Testspecimens RecommendedtestspecimendimensionsaregiveninTable1. Table1Recomm

32、endedtestspecimendimensions Dimensionsinmillimetres 1D,2D,xD Tolerance l t ,totallength 20to25 1 h,thickness 3 1 b,width 10 0,1 S,supportspan 15 0,1 Planeparallelismofmachinedparts 0,05 NOTE Thesupportspanof15mmisderivedfromthetestspecimenthicknessof3mmgiveninTable1.Ifadifferent thicknessisusedthesp

33、anshouldbechangedaccordingto: S=5h 1 7 Testspecimenpreparation 7.1Machining Duringcuttingout,careshallbetakentoensurethatthetestspecimenaxescoincidewiththefibredirections. Machiningparameterswhichavoiddamagetothematerialshallbeestablishedanddocumented.These parametersshallbeadheredtoduringtestspecim

34、enpreparation. 7.2Numberoftestspecimens Atleastfivevalidtestresults(see8.4)arerequired. NOTE Ifstatisticalevaluationisrequired,thenumberoftestspecimensshouldbeinaccordancewithENV8435. 8Procedure 8.1Displacementrate Useaconstantcrossheaddisplacementratewhichallowstestspecimenfailurewithin1min.Thedisp

35、lacement rateshallbereported. NOTE Generally,adisplacementratebetween0,5mm/minand1mm/minisused. 8.2Measurementoftestspecimens Measurethewidthandthicknesstothenearest0,1mminthecentreandateachendofthetestspecimenand reportthearithmeticmeansofthemeasurements.EN6585:2002(E) 7 8.3Testingtechnique 8.3.1 T

36、estspecimenmounting Thetestspecimenshallbeinstalledinthetestjigcentredwithrespecttotherollersandwithitslongitudinalaxis perpendiculartotheaxesoftherollers. NOTE Itisrecommendedtouseatoolforthispurpose. Zerotheloadcelloutput.Whenrequired,asmallpreloadcanbeappliedinordertomaintaincorrectpositioningof

37、thetestspecimen.Thispreloadshallnotincreasebeyond5%oftheexpectedfailureforceatanytime. 8.3.2Measurements Setthedisplacementrateonthetestmachine; zerotheloadcell; recordtheforceversustime; loadthetestspecimenuptofailure; readtheloadsignalaftertestspecimenfailure; notethepositionoffracturelocationandi

38、dentifythefailuremode(see8.4). 8.4Testvalidity Thefollowingcircumstanceswillinvalidateatest: a) failuretospecifyandrecordtestconditions; b) failuretonotethemodeandlocationoffracture; c) testspecimenfailurenotoccurringinashearplanewithin 4 h fromthemidplane. 9 Calculationofresults Thefollowingexpress

39、ionshallbeusedtocalculatetheinterlaminarshearstrength: bh F ILSS b 4 3 = where ILSS b istheinterlaminarshearstrength,inplane(1,2),inmegapascal(MPa); F istheshearfailureforce,innewton(N); b isthemeantestspecimenwidth,inmillimetre(mm); h isthemeantestspecimenthickness,inmillimetre(mm).EN6585:2002(E) 8

40、 10 Testreport Thetestreportshallcontainatleastthefollowinginformation: a) nameandaddressofthetestingestablishment; b) dateofthetest,uniqueidentificationofreportandofeachpage,customernameandaddressandsignatory; c) areferencetothisEuropeanstandard,i.e.“determinedinaccordancewithEN6585“; d) testspecim

41、endrawingorreference; e) descriptionofthetestmaterial(materialtype,manufacturingcode,batchnumber); f) theareaandorientationoftestspecimenstakenfromasampleofmaterial; g) displacementrate; h) numberoftestcarriedoutandthenumberofvalidresultsobtained; i) forceversustimerecord; j) individualresultsandari

42、thmeticmeans; k) modeandfailurelocationofallthetestspecimensusedforobtainingtheaboveresults; l) anycommentsaboutthetestortestresults.EN6585:2002(E) 9 Bibliography 1ENV 8435, AdvancedtechnicalceramicsMonolithicceramicsMechanicaltestsatroomtemperature Part5:Statisticalanalysis.BS EN 658-5:2002 BSI 389

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