ISO INTERNATIONAL STANDARD 15654 Second edition 2015-09-15 Fatigue test method for transmission precision roller chains and leaf chains Methode d'essai de fatigue pour chaines de transmission de preécision a rouleaux et chaines de levage a mailles jointives Reference number IS0 15654:2015(E) ISO International Organization for Standardization see=Zhejiang Institute of Standardization 5956617 @IS02015 vided by IHS under I Not for Resale, 2015/11/11 08:46:29 No reproduction or networking permitted without license from IHS IS0 15654:2015(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 +41 22 749 09 47 copyright@iso.org www.iso.org Not for Resale, 2015/11/11 08:46:29 networking permited without license from IHS IS0 15654:2015(E) Contents Page Foreword ..V 1 Scope 2 Normative references ..1 3 Symbols. 4 Principle. 5 Apparatus. 5.1 Testing machine .4 5.2 Test fixtures .4 6 Test specimens. ..4 7 Test procedure. .5 7.1 Testforces 5 7.1.1 Minimum force .5 7.1.2 Maximum force. .5 7.1.3 Test force ..5 7.1.4 Force application 6 7.2 Conformity test. .6 7.2.1 Purpose 6 7.2.2 Endurance. .6 7.2.3 Minimum test force. .6 7.2.4 Maximum test force. .7 7.2.5 Number of tests. 7 7.2.6 Acceptance. .7 7.3 Staircasetest 7.3.1 Purpose 7 7.3.2 Description. 7.3.3 Endurance. 7.3.4 Rules for conducting a staircase test 7 7.3.5 Determining step size ..8 8 Staircase test data analysis 8.1 Data ..8 8.2 Plotting staircase data ..8 8.3 Statistical calculations .9 8.3.1 Mean fatigue strength: 0,50 probability of survival .9 8.3.2 Standarddeviations .9 8.3.3 Fatigue limit: 0,998 65 probability of survival. .9 9 Report of test results .9 9.1 Test chain information .9 9.2 Test equipment and procedures .10 9.2.1 Test equipment. .10 9.2.2 Test procedures. 10 9.3 Testresultsforconformityandstaircasetests .10 Annex A (informative) Survival test with abridged Probit analysis ..11 Annex B (informative) Combined test methods ..15 Annex C (informative) Justification for adding one step to fatigue limit in staircase analysis ...21. Annex D (informative) Adding an additional “phantom" point at the end of staircase test ..24 Annex E (informative) Reporting fatigue test results ..25 Annex F (informative) Establishing chain application fatigue ratings. ..33 Annex G (informative) Extrapolating fatigue strength from 3 × 106 to 107 cycles ..39 Inteatinal oganzation @stS201.5 - All rights reserved iii Licensee=Zhejiang Institute of Standardization 5956617 ed without license from IHS