ISO/TS TECHNICAL SPECIFICATION 17958 First edition 2013-04-15 Paper and board Determination of fracture toughness - Constant rate of elongation method (1,7 mm/s) Papier et carton - Détermination de la résistance a la rupture - Méthode a gradient d'allongement constant (1,7 mm/s) Reference number ISO/TS17958:2013(E) ISO IS02013 IS0/TS 17958:2013(E) COPYRIGHTPROTECTEDDOCUMENT @ISO2013 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form 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 ii @ IS0 2013 - All rights reserved IS0/TS 17958:2013(E) Contents Page Foreword ..iv Introduction. ..V 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 Principle .3 5 Apparatus ..3 6 Calibration and adjustment of apparatus 7 Sampling and preparation of test pieces. .5 7.1 Sampling.. .5 7.2 Conditioning. .5 7.3 Determination of grammage .6 7.4 Preparation of test pieces for tensile testing .6 7.5 Preparation of test pieces for fracture toughness testing ..6 8 Procedure .6 8.1 Tensile testing .6 8.2 Fracture toughness testing ..6 9 Calculations .7 9.1 General .7 9.2 Tensile testing and evaluation of tensile properties. .7 9.3 Fracture toughness testing and evaluation of fracture toughness 9.4 Determination of ISO fracture strength and ISO fracture strain .9 9.5 Indexed parameters. 11 10 Report ..11 Annex A (normative) Uncertainty determination, ..13 Bibliography .16 @ IS0 2013 - All rights reserved iii