ISO INTERNATIONAL STANDARD 20932-2 Firstedition 2018-11 Textiles Determination of the elasticity of fabrics - Part 2: Multiaxial tests Textiles - Détermination de I'elasticité des étoffes - Partie 2: Essais multiaxiaux Reference number ISO 20932-2:2018(E) ISO @IS02018 IS0 20932-2:2018(E) COPYRIGHTPROTECTEDDOCUMENT @ IS0 2018 All rights reserved. Unless otherwise specified, or required in the context of its implementation, 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 CP 401 : Ch. de Blandonnet 8 CH-1214 Vernier, Geneva Phone: +4122 749 0111 Fax: +41 22 749 09 47 Email: [email protected] Website: www.iso.org Published in Switzerland ii @ IS0 2018 - All rights reserved IS0 20932-2:2018(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. .1 2 Normative references ..1 3 Terms and definitions 4 Principle ..2 5 Sampling. ..2 6 Atmosphere for conditioning and testing ..2 7 Preparation of test specimens ..3 8 Method A - Dynamic test. 8.1 Apparatus .3 8.2 Test specimen preparation. .3 8.3 Procedure for loading test specimen in clamping ring .4 8.4 Recording... .4 8.5 Expressions and calculations of test results .4 8.6 Test report.. .5 9 MethodB Statictest .5 9.1 Preliminary test .5 9.1.1 .5 Apparatus. 9.1.2 Preparation of test specimens .5 9.1.3 .5 Procedure. 9.2 Actual static test. 6 9.2.1 Apparatus 6 9.2.2 Selection of testing parameters 6 9.2.3 Preparation of test specimens.. . 6 9.2.4 Procedure .6 9.2.5 Setting of the hemispherical shape. .6 9.2.6 Measurementoftheresidualdeformation .7 9.2.7 Recording .7 9.2.8 Expressions and calculations of test results .7 9.2.9 Test report Annex A (informative) Example of a typical cycling graph .9 Annex B (informative) Procedure for sampling .10 Annex C (informative) Example of a pattern for cutting test specimens from a laboratory sample ..11 Annex D (informative) Method A - Dynamic test equipment ..12 Annex E (informative) Method B - Static test equipment ..15 Bibliography .17 @ IS0 2018 - All rights reserved iii