ISO 15114 INTERNATIONAL STANDARD First edition 2014-05-15 Fibre-reinforced plastic composites Determination of the mode II fracture resistance for unidirectionally reinforced materials using the calibrated end-loaded split (C-ELS) test and an effective crack length approach Composites plastiques renforcesdefibres-Détermination dela résistance a la rupture en mode Il de materiaux renforcés defibres unidirectionelles en utilisant I'essai de delaminage (C-ELS) et une approche de la longueur de fissure reelle ERIE ISORe5er4c2 0(Ey SO Copyright Intermational Organization for Standardizatior cense from IHS Notfor @IS02014 IS015114:2014(E) COPYRIGHTPROTECTEDDOCUMENT @ISO 2014 AHbyghty raeansedlalestronicotherwipemifiedlaniclaindfiutdisgpplbbicatbpyimgyoltqnstihgintprndtioedntnttiaet) otimeamyisewithout prior written permission. Permission can be requested from either ISO at the address below or Iso's member body in the country of the requester. SSeostltght officeCH-1211 Geneva 20 Tel.+4122749 0111 Fax + 4122 749 09 47 [email protected] Published in Switzerland CoyrighnemaianalOrganizatonfrStandardization y IHS underll Jniversity of Allt 4001, User=sharabiani, shahramfs networking permited without license from IHS IS015114:2014(E) Contents Page Foreword iv Iptroduction. Scope 1 2 Normativereferences 1 3 Symbols and abbreviatedterms 4 Principle .2 5 Apparatus. 2 6 Specimens 4 6.1 Preparation of specimens 4 6.2 The initial defect. 6.3 Nttasthuiregtloenltitaidbrhihogk.to.the.specimen 6.5 Final specimen preparationand measuringdimensions 6.6 Numberofspecimens 7 Procedure. 6 7.1 Performingthe calibration of the ELS fixture 6 7.2 Pre-cracking the specimens. 8 Data analysis 8 8.1 The points for data analysis 8 8.2 Determinationof theELSclampcorrection 10 9 Precision. .13 10 Test report. .14 Annex A (informative) Large displacement and load-block correction factors .16 Bibliography .18 Copyright Intemational Organization for Standardizatior iii outE IS0 15114:2014(E) Foreword Iso (the International Organization for Standardization) is a worldwide federation of national standards thudiegh(Iso techmioet boabiasiftasewofkchf pitepbringbodyInitteresitedaiStandebjdstisfonowhidhycarrtiechaital committeehasbeen establishedhastherighttoberepresented onthat committee.International organizations, governmentaland non-governmental, in liaison with IsO,alsotake partin the work. ISO collaborates closely with the electrotechnical standardization.International Electrotechnical Commission (IEC) on all matters of The procedures used to develop this document and those intended for its further maintenance are diferptdinybsofso/Bentiyes hutid benotedrThinthadfferent waaedriovaiteriaccordance woh the editorial rules of theIsO/IEC Directives,Part2 (seewww.iso.org/directives) Rttentionrights.dswts tan hehplssibihay sespensibhe fele maentiryfng alythsh'documaxtba thet Pegails, subject of anypate beintheIntroductionand/o on the Iso list of patent declarations received (see www.iso.org/patents). Anytrade used in this constitute nameendorsement.document is information given for the convenience of users and does not Foran explanation onthemeaning ofIsO specificterms and expressions related toconformity ts STrade(TBT wefian folfowinatURaboutSO'reworad'ssppnentnthey WTOrritriRles the Technical Barriers The committee responsiblefor this document is Iso/TC 61,Plastics, Subcommittee SC 13, Composites andreinforcementfibres. lotforRe IS015114:2014(E) Introduction appliedbeenbeamhampered experimental difficulty ofdetermining develops aheadthe absence front. specimens (n.b.standardized by ASTM)appearparticularly,significantpoint loaded (4ENF) notchspecimen. procedureto presentedthe clampingthe end- loadedsimultaneouslyapparatusdeterminespecifiesflexuralexperimental meansprocedure crackincludes an experimental determination ofmeasurement canuseavoided.calculated (or Integrity research Technical Committeeround-robin exercisesComposites[], who carried 2oo7.preliminary Previous atte