ISO INTERNATIONAL STANDARD 12110-2 First edition 2013-07-01 Metallic materials Fatigue testing Variable amplitude fatigue testing Part 2: Cycle counting and related data reduction methods Matériaux métalliques Essais de fatigue - Essais sous amplitude variable Partie 2: Methodes de comptage des cycles et methodes associées de réduction des données Reference number ISO 12110-2:2013(E) LSO @ IS0 2013 I without license from IHS Not for Resale IS0 12110-2:2013(E) COPYRIGHTPROTECTEDDOCUMENT ISO2013 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 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 @ IS0 2013 - All rights reserved No reproductic networking permited without license from IHS Not for Resale IS0 12110-2:2013(E) Contents Page Foreword ..iv 1 Scope 2 Normative references .1 3 Terms and definitions 4 Cycle counting techniques ..2 4.1 General. .2 4.2 Cycle counting methods ..3 5 Counting technique selection .7 Annex A (informative) Rainflow counting ..8 Annex B (informative) Examples of quantification, cycle extraction, and open cycle sequence composition of cycles. .21 Annex C (informative) Example of result presentation for the Rainflow counting method ..26 Bibliography .32 iii by IHS under se with IS thout license from IHS Not for Resale