ISO INTERNATIONAL STANDARD 27727 First edition 2008-09-01 Rubber, vulcanized Measurement of fatigue crack growth rate Caoutchouc vulcanisé Mesurage du taux de croissance des craquelures de fatigue Reference number ISO 27727:2008(E) @ ISO 2008 by IHS under lic itted without license from IHS Not for Resale ISO 27727:2008(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 @ ISO2008 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 copyright@iso.org Web www.iso.org Published in Switzerland @ Iso 2008 - All rights reserved I without license from IHS Not for Resale ISO 27727:2008(E) Contents Page Foreword. 1 Scope 2 Normative references 3 Terms and definitions.. 4 Principle.. 5 Apparatus.. 5.1 Fatigue crack growth rate test machine.. 5.2 Image-processing device.... 5.3 Temperature-controlled chamber ...... 5.4 Thickness- and width-measurement instruments 6 Testpieces 6.1 Dimensions.. 6.2 6.3 Time interval between moulding and testing.... 6.4 Conditioning.... 6.5 Preparation of test pieces for testing .... 7 Test conditions 7.1 Temperature .... 7.2 Cycle frequency 7.3 Strain amplitude.. 7.4 Testing under non-relaxed conditions 8 8.1 8.2 Determination of tearing energy 8.3 Measurement of crack growth... 9 Expression of results 10 Precision 8 11 Test report . 8 Bibliography. 10 CopyrightInternatinal Oorganizain frstandardizalirnghts reserved ii Not for Resale