ISO INTERNATIONAL STANDARD 18488 First edition 2015-09-01 Polyethylene (PE) materials for piping systems Determination of Strain Hardening Modulus in relation to slow crack growth Test method Matériaux polyethylene (PE) pour systemes de canalisations - Détermination du module d'écrouissage en relation avec la propagation lente de fissures - Methode d'essai Reference number ISO 18488:2015(E) SO International Organization for Standardization @ IS0 2015 dardization 5956617 ed without license from IHS IS0 18488:2015(E) COPYRIGHTPROTECTEDDOCUMENT IS02015,PublishedinSwitzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without 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. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+41 22 749 01 11 Fax +41227490947 [email protected] www.iso.org Intenationai br PrganizationforStandardization I by IHS unde Not for Resale, 2015/11/11 07:16:15 etworking permitted without license from IHS IS0 18488:2015(E) Contents Page Foreword ..iv Introduction. ... 1 Scope. ..1 2 Normative references 3 Terms and definitions 4 Principle 5 Apparatus ..3 6 Test specimens.. ..4 6.1 Test specimen geometry and dimensions ..4 6.2 Test specimen preparation 7 Test procedure 8 Data analysis. ..6 9 Test report ..6 Annex A (informative) Neo-Hookean constitutive model ..8 Bibliography ..10 iii see=Zhejiang Institute of Standardization 5956617 vided by IHS under ed without license from IHS