BS ISO BRITISH STANDARD 18437-4:2008 Mechanical vibration and shock - Characterization of the dynamic mechanical properties of visco- elastic materials Part 4: Dynamic stiffness method ICS 17.160 BSi NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW British Standards BS ISO 18437-4:2008 National foreword This British Standard is the UK implementation of ISO18437-4:2008. The UK participation in its preparation was entrusted to Technical Committee GME/21,Mechanical vibration, shock and condition monitoring. A list of organizations represented on this committee can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity fromlegalobligations. This British Standard Amendments/corrigendaissuedsincepublication was published under the authority of the Standards Policy and Date Comments Strategy Committee on 30 November 2008 BSI 2008 ISBN9780580566455 BS ISO 18437-4:2008 ISO INTERNATIONAL STANDARD 18437-4 First edition 2008-06-01 Mechanical vibrationandshock- Characterization of the dynamic mechanical properties of visco-elastic materials - Part 4: Dynamic stiffness method Vibrations et chocsmecaniques-Caracterisation desproprietes mecaniquesdynamiquesdesmateriauxvisco-elastiques Partie 4:Methodede la raideurdynamique Reference number ISO 18437-4:2008(E) @ISO 2008 BS ISO 18437-4:2008 ISO 18437-4:2008(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 the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHTPROTECTEDDOCUMENT ? ISO 2008 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 Casepostale56.CH-1211Geneva20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail [email protected] Web www.iso.org Published in Switzerland ii @ISO2008-All rights reserved BS ISO18437-4:2008 ISO 18437-4:2008(E) Contents Page Foreword.. iv Introduction 1 Scope 2 Normative references.. 3 Terms and definitions 2 4 Principle 4 Equipment . 5.1 Hardware.... 5.2 Set.up........ Recommended set-upfor applying the different types of strain to the test piece and calculation of quotients, αE,G,K. 9 6.1 Choosingtestpiecesize. 6.2 Rigid plastics.. 6.3 Rubbery materials. 10 6.4 Viscousmaterials... 6.5 Bulk modulus of allmaterials. 7 Testpieces.. 13 7.1 Choosing the shape and size of the test piece.. 13 7.2 Instructionsformanufacturing and preparingtest pieces 14 8 Conditioning.... 16 8.1 8.2 Temperature .16 8.3 Mechanical conditioning.. 16 8.4 Humidity conditioning... 16 8.5 Measurement conditioning.. 9 Main error sources.. 10 Measurementresultsandprocessing 10.1 Frequency-temperaturesuperposition. 17 10.2 Data presentation... 18 10.3 Test report. 19 Bibliography 20 @ ISO 2008 - All rights reserved ili BSISO18437-4:2008 ISO18437-4:2008(E) Foreword IsO (the International Organization for Standardization) is a worldwide federation of national standards bodies InternationalElectrotechnicalCommission(lEC)onallmattersofelectrotechnicalstandardization. adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. Attention is drawn to the possibility that some of the