ISO INTERNATIONAL STANDARD 11093-8 Third edition 2017-06 Paper and board Testing of cores Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis Papier et carton - Essais des mandrins - Partie 8: Deétermination de la fréquence propre et du module de flexion par analyse modale experimentale Reference number ISO 11093-8:2017(E) rso International Organization for Standardization @ IS0 2017 HEJIANG INST OF STANDARDIZATIONC15956617 IS0 11093-8:2017(E) COPYRIGHTPROTECTEDDOCUMENT IS0 2017, Published in Switzerland 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. ISOcopyrightoffice Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel. +41 22 749 01 11 Fax +41 22 749 09 47 [email protected] www.iso.org Internatinair PrganizationforStandardization icensee-ZHEJIANG INST OF STANDARDIZRoISQ s1.7 - All rights reserved Not for Resale, 2017/9/12 02:57:10 etworking permitted without license from IHS IS0 11093-8:2017(E) Contents Page Foreword ..iv 1 Scope .1 2 Normative references 3 Terms and definitions 4 Principle 5 Apparatus 6 Testpiece .2 6.1 Sampling. .2 6.2 Test-piece size .3 6.3 Conditioning .3 7 Procedure .5 8 Calculation .5 8.1 Calculation of the flexural modulus .5 8.2 Calculation of the rotational speed factor .6 9 Test report .6 Bibliography 8 iii see=ZHEJIANG INST OF STANDARDIZATION C15956617 vided by IHS under lic ed without license from IHS Not for Resale, 2017/9/12 02:57:10