ISO INTERNATIONAL STANDARD 25217 First edition 2009-05-01 Adhesives Determination of the mode 1 adhesive fracture energy of structural adhesive joints using double cantilever beam and tapered double cantilever beam specimens Adhésifs Détermination de I'énergie de fracture adhésive en mode 1 des adhesifs structurels utilisant des éprouvettes de rayon de cantilever double et des éprouvettes de rayon de cantilever double effilees Reference number ISO 25217:2009(E) @ISO 2009 by IHS under ted without license from IHS Not for Resale ISO 25217:2009(E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobe's licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which are embedded are licensed to and installed on the computer performing the editing. In accepts no liability in this area. Adobe is a trademark of Adobe Systems Incorporated. Details of the software products used to create this PDF file can be found in the General Info relative to the file; the PDF-creation parameters were optimized for printing. Every care has been taken to ensure that the file is suitable for use by IsO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below COPYRIGHTPROTECTEDDOCUMENT @ ISO2009 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, IsO's member body in the country of the requester. ISO copyright office Case postale 56. CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland @ ISO 2009 - All rights reserved edwithoutlicense from IHS Not for Resale ISO 25217:2009(E) Contents Page Foreword. 1 Scope 2 Normative references 3 Symbols and abbreviated terms 4 Principle.. 5 Apparatus 6 Specimens..... 6.1 Number of specimens ... 6.2 Conditioning...... 6.3 6.4 Measurement of specimen dimensions... 6.4.1 DCB substrates.... 6.4.2 TDCB substrates.. 6.4.3 DCB and TDCB substrates 6.5 Preparation of specimens.... 7 Procedure... 7.1 Test set-up and data recording . 7.2 Initial loading (the precracking stage).... 7.3 Re-loading: Testing from the mode I precrack, 7.4 Measurement of machine compliance... 8 Data analysis. 8.1 Determination of the raw data from the load-displacement trace 8.1.1 8.1.2 Initiation values 8.1.3 Propagation values.. 8.2 Determination of Gic... 10 8.2.1 10 8.2.2 Double cantilever beam (DCB) .... 10 8.2.3 Tapered double cantilever beam (TDCB) 12 9 Test report ... 13 9.1 Test report for the DCB test.. 13 9.2 Test report for the TDCB test ... 14 Annex A (informative) Measurement of test system compliance.... 16 Annex B (normative) Procedure to follow when unstable or “stick-slip" crack growth is observed during the fracture test..... Annex C (normative) Procedure to detect the occurrence of plastic deformation during a DcB or TDCB adhesive joint test .. 19 Annex D (informative) Summary of background theory... .20 Bibliography.. 24 CopyrightInternatinal Ooganizaion frsandardizalinghts reserved ii ted without license from IHS Not for Resale