BS EN 658-4-2003 Advanced technical ceramics - Mechanical properties of ceramic composites at room temperature - Determination of interlaminar shear strength by compression loading.pdf

1、BRITISH STANDARD BS EN 658-4:2003 Advanced technical ceramics Mechanical properties of ceramic composites at room temperature Part 4: Determination of interlaminar shear strength by compression loading of notched test specimens The European Standard EN 658-4:2003 has the status of a British Standard

2、 ICS 81.060.30 BS EN 658-4:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 7 March 2003 BSI 7 March 2003 ISBN 0 580 41373 X National foreword This British Standard is the official English language version of EN 658-4:2003. It supersedes

3、DD ENV 658-4:1993 which is withdrawn.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

4、 The 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 Stan

5、dards 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

6、 responsible 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 fro

7、nt cover, the EN title page, pages 2 to 11 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 EN6584 February2003 ICS81.060.30 Supers

8、edesENV6584:1992 Englishversion AdvancedtechnicalceramicsMechanicalpropertiesofceramic compositesatroomtemperaturePart4:Determinationof interlaminarshearstrengthbycompressionloadingofnotched testspecimens CramiquestechniquesavancesPropritstechniques descramiquescompositestempratureambiante Partie4:D

9、terminationdelarsistanceaucisaillement interlaminaireparcompressiondprouvettesentailles HochleistungskeramikMechanischeEigenschaftenvon keramischenVerbundwerkstoffenbeiRaumtemperatur Teil4:BestimmungderScherfestigkeitvongekerbten ProbenunterDruckbeanspruchung ThisEuropeanStandardwasapprovedbyCENon28

10、November2002. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeobtainedonapplicationtotheManagementC

11、entreortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheManagementCentrehasthesamestatusasthe official versions. CENmembersarethenationalstandardsb

12、odiesofAustria,Belgium,CzechRepublic,Denmark,Finland,France,Germany,Greece, Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal,Slovakia,Spain,Sweden,SwitzerlandandUn ited Kingdom. EUROPEANCOMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG Mana

13、gementCentre:ruedeStassart,36B1050Brussels 2003CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN6584:2003EEN6584:2003(E) 2 Contents page Foreword3 1 Scope 4 2 Normativereferences 4 3 Principle4 4 Terms,definitionsandsymbols .4 5 Apparatus .5 5.1 Test

14、machine 5 5.2 Loadtrain 5 5.3 Dimensionmeasuringdevices . 6 6 Testspecimen . .6 7 Testspecimenpreparation . 8 7.1 Machining .8 7.2 Numberoftestspecimens 8 8 Procedure .8 8.1 Displacementrate . .8 8.2 Measurementoftestspecimens . .8 8.3 Testingtechnique . .8 8.4 Testvalidity . .8 9 Calculation9 9.1 T

15、estspecimenorigin .9 9.2 Interlaminarshearstrength . .9 10 Testreport 9 AnnexA (informative) Examplesofrupture .1 0 A.1 Validrupture. 10 A.2 Nonvalidrupture . 10 Bibliography 11EN6584:2003(E) 3 Foreword Thisdocument(EN6584:2003)hasbeenpreparedbyTechnicalCommitteeCEN/TC184“Advancedtechnical ceramics“

16、,thesecretariatofwhichisheldbyBSI. ThisEuropeanStandardshallbegiventhestatusofanationalstandard,eitherbypublicationofanidenticaltextor byendorsement,atthelatestbyAugust2003,andconflictingnationalstandardsshallbewithdrawnatthelatestby August2003. ThisdocumentsupersedesENV6584:1992. AnnexAisinformativ

17、e. EN658AdvancedtechnicalceramicsMechanicalpropertiesofceramiccompositesatroomtemperaturehassix parts: Part1:Determinationoftensileproperties Part2:Determinationofcompressiveproperties Part3:Determinationofflexuralstrength Part4:Determinationofinterlaminarshearstrengthbycompressionloadingofnotchedte

18、stspecimens Part5:Determinationofinterlaminarshearstrengthbyshortspanbendtest(threepoints) Part6:Determinationofinterlaminarshearstrengthbydoublepunchshearing AccordingtotheCEN/CENELECInternalRegulations,thenationalstandardsorganizationsofthefollowing countriesareboundtoimplementthisEuropeanStandard

19、:Austria,Belgium,CzechRepublic,Denmark,Finland, France,Germany,Greece,Hungary,Iceland,Ireland,Italy,Luxembourg,Malta,Netherlands,Norway,Portugal, Slovakia,Spain,Sweden,SwitzerlandandtheUnitedKingdom.EN6584:2003(E) 4 1Scope ThispartofEN658specifiestheconditionsfordeterminationoftheinterlaminarshearst

20、rengthofceramicmatrix compositematerialswithcontinuousfibrereinforcementatroomtemperature,byloadinganotchedtestspecimen incompression.Thismethodappliestoallceramicmatrixcompositeswithacontinuousfibrereinforcement unidirectional(1D)andbidirectional(2D)andtridirectional(xD,with2 x 3)asdefinedinENV1323

21、3,loaded alongoneprincipalaxisofreinforcement. TwoothermethodsforthedeterminationofshearstrengtharegiveninfurtherpartsofEN658. NOTE 1 Theinterlaminarshearcharacteristicscanvarysignificantlydependingontestspecimenpreparationand dimensions,rateofapplicationofthetestforce,surfacecondition,etc. NOTE2 Ho

22、wever, results obtained by this part of EN 658 cannot be compared with results obtained by the two other methods. NOTE3 Careshouldbeexercisedininterpretingtheresultsoftheproposedtestingmethodstoobtainabsolutevaluesofthe interlaminarshearstrengthofceramicmatrixcompositesfordesignpurposes. 2 Normative

23、references ThisEuropeanStandardincorporatesbydatedorundatedreference,provisionsfromotherpublications.These normativereferencesarecitedattheappropriateplacesinthetextandthepublicationsarelistedhereafter.For datedreferences,subsequentamendmentstoorrevisionsofanyofthesepublicationsapplytothisEuropean S

24、tandardonlywhenincorporatedinitbyamendmentorrevision.Forundatedreferencesthelatesteditionofthe publicationreferredtoapplies(includingamendments). ENV13233:1998, AdvancedtechnicalceramicsCeramiccompositesNotationsandsymbols . ENISO75001:1999, MetallicmaterialsVerificationofstaticuniaxialtestingmachin

25、esPart1: Tension/compressiontestingmachines(ISO75001:1999). ISO3611, Micrometercallipersforexternalmeasurements . 3Principle Thetestconsistsofmeasuringtheforcerequiredtofractureatransverselynotchedtestspecimenofdefinedshape anddimensions,subjectedtocompressiveloadingindirection1or2,suchthatfailureoc

26、cursbyinterlaminarshear inplane(1,2),asdefinedinENV13233.Thetestisperformedatconstantcrossheaddisplacementrate. 4 Terms,definitionsandsymbols ForthepurposesofthisEuropeanStandard,thefollowingterms,definitionsandsymbolsandthosegivenin ENV13233:1998apply. 4.1 shearfailureforce, F maximumforcerequiredt

27、oproduceinterlaminarshearfailurewhendoublenotchedtestspecimenissubjectedto compressionundermonotonicloadingEN6584:2003(E) 5 4.2 interlaminarshearstrengh, ILLS C ratiocalculatedonthebasisoftheshearfailureforceandtheshearloadedarea NOTE Thenotation ILSSissupplementedbyasmallletterreferringtothetestmet

28、hoddescribed;inthiscase ILSS c forthe interlaminarshearstrengthobtainedfromacompressionloadingtest. 5Apparatus 5.1Testmachine Thetestmachineshallbeequippedwithasystemforrecordingtheforceappliedtothetestspecimen. Themachineshallconformtograde1inENISO75001:1999. 5.2Loadtrain Theloadtrainconfigurations

29、hallallowthealignmentofthetestspecimenaxiswiththedirectionoftheload.Care shallbetakentomaintainproperalignmentofthetestspecimenduringloadingandtoavoidbucklingofthetest specimen. Twotechniquesarepossible: compressionbetweenplatenswithoutaguide; compressionbetweenplatenswithaguidingtool. Inbothcases,c

30、ompressionplatensareconnectedtotheloadcellandonthemovingcrosshead.Theparallelismof theseplatensshallbebetterthan0,01mmintheloadingareaandtheyshallbeperpendiculartotheloaddirection. NOTE1 Acompliantinterlayermaterialbetweenthetestspecimenandplatenscanbeusedfortestingmacroscopically inhomogeneousmater

31、ialstoensureuniformcontactpressure. NOTE2 Whentestspecimenstobetestedhaveathicknesslessthan3mm,theuseofaguidingtoolisrecommended,to avoidbuckling.Thisguideshouldnotcauseanyparasiticeffectduringthetest.AnexampleisgiveninFigure1.EN6584:2003(E) 6 Key 1 Clampingjaws 2 Fixingscrews 3 Adjustingscrews 4 Te

32、stspecimen Figure1Guidingtool 5.3Dimensionmeasuringdevices Devicesusedformeasuringlineardimensionsofthetestspecimenshallbeaccurateto 0,1mm.Micrometers shallbeinaccordancewithISO3611. NOTE Thedistancebetweenthenotchescanforexamplebemeasuredbyusinganopticalcomparator. 6 Testspecimen Thetestspecimeniss

33、howninFigure2.Notchesaremachined,oneofeachsideofthetestspecimen.The recommendedtestspecimendimensionsaregiveninTable1.Thedistancebetweennotchesmeasuredbetween theinnerflanksofthenotches(seeFigure2)shallbedetermined,takingintoaccounttherequirementstoobtain shearfailure.EN6584:2003(E) 7 Figure2Doublen

34、otchedinterlaminarsheartestspecimen Table1Recommendedtestspecimendimensions Dimensionsinmillimetres 1D,2D,xD Tolerance l t ,totallength 25to30 1 h,thickness 2to10 1 b,width 10to13 0,1 L,distancebetweennotches 8to13 0,1 Notchdepth h/2+0,1 0,05 d,notchwidth 0,5 0,1 Planeparallelismofmachinedparts 0,05

35、 NOTE Iftheproposednotchdepth(h/2+0,1)doesnotleadtoaruptureinplane(1,2),thenthedepthofthenotchcanbe increasedto: 1 , 0 2 ) 1 ( + + n n h where n isthenumberofplies.EN6584:2003(E) 8 7 Testspecimenpreparation 7.1Machining Duringcuttingout,careshallbetakentoensurethatthetestspecimenaxescoincidewiththef

36、ibredirections. Machiningparameterswhichavoiddamagetothematerialshallbeestablishedanddocumented.These parametersshallbeadheredtoduringtestspecimenpreparation. 7.2Numberoftestspecimens Atleastfivevalidtestresults(see8.4)arerequired. NOTE Ifstatisticalevaluationisrequired,thenumberoftestspecimensshoul

37、dbeinaccordancewithENV8435. 8Procedure 8.1Displacementrate Useaconstantcrossheaddisplacementratewhichallowstestspecimenfailurewithin1min.Thedisplacement rateshallbereported. NOTE Generally,adisplacementratebetween0,5mm/minand1mm/minisused. 8.2Measurementoftestspecimens Measurethewidthandthicknesstot

38、henearest0,1mminthecentreandateachendofthetestspecimenand reportthearithmeticmeansofthemeasurements.Measurethedistancebetweenthenotchestothenearest 0,1mm. 8.3Testingtechnique Installthetestspecimeninthetestmachineandsetthecrossheadspeed.Makearecordofforceversustime duringthetest.Verifythefailureloca

39、tionandfailuremode(see8.4). 8.4Testvalidity Thefollowingcircumstanceswillinvalidateatest: a) failuretospecifyandrecordtestconditions; b) failuretonotethemodeandlocationoffracture; c) testspecimenfailurenotoccurringinashearplaneclosetothemedianplanedelineatedbythenotches (examplesaregiveninannexA); d

40、) visiblebendingofthetestspecimenortestspecimenslippageoccurringduringthetest.EN6584:2003(E) 9 9Calculation 9.1Testspecimenorigin Adiagramillustratingthereinforcementdirectionsofthematerialwithrespecttothelongitudinalaxisofthetest specimenshallalwaysaccompanythetestresults. 9.2Interlaminarshearstren

41、gth Thefollowingexpressionshallbeusedtocalculatetheinterlaminarshearstrength: bL F ills c = where ILSS c istheinterlaminarshearstrength,inplane(1,2),inmegapascal(MPa); F istheshearfailureforce,innewton(N); b isthemeantestspecimenwidth,inmillimetre(mm); L isthedistancebetweenthenotches,inmillimetre(m

42、m). 10 Testreport Thetestreportshallcontainatleastthefollowinginformation: a) nameandaddressofthetestingestablishment; b) dateofthetest,uniqueidentificationofreportandofeachpage,customernameandaddressandsignatory; c) areferencetothisEuropeanStandard,i.e.“determinedinaccordancewithEN6584“; d) testspe

43、cimendrawingorreference; e) descriptionofthetestmaterial(materialtype,manufacturingcode,batchnumber); f) theareaandorientationoftestspecimenstakenfromasampleofmaterial; g) displacementrate; h) numberoftestscarriedoutandthenumberofvalidresultsobtained; i) forceversustimerecord; j) individualresultsandarithmeticmeans; k) modeandfailurelocationofallthetestspecimensusedforobtainingtheaboveresults; l) anycommentsaboutthetestortestresults.EN6584:2003(E) 10 AnnexA (informative) Examplesofrupture A.1 Validrupture FigureA.1Vali