BS ISO 28704:2011 BSl Standards Publication Fine ceramics (advanced ceramics, advanced technical ceramics) Test method for cyclic bending fatigue of porous ceramics at room temperature bsi. ..making excellence a habit. BS ISO 28704:2011 BRITISH STANDARD National foreword This British Standard is the UK implementation of IS0 28704:2011. The UK participation in its preparation was entrusted to Technical CommitteeRPl/13,Advancedtechnical ceramics. 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. @BSI 2011 ISBN9780580669767 ICS 81.060.30 Compliance with a British Standard cannot confer immunity from legal obligations. This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 September 2011. Amendments issued since publication Date Text affected BS ISO 28704:2011 INTERNATIONAL ISO STANDARD 28704 First edition 2011-08-15 Fine ceramics (advanced ceramics, advanced technical ceramics) — Test method for cyclic bending fatigue of porousceramics at roomtemperature CeramiquestechniquesMethoded'essai defatigueparflexion cyclique des ceramiques poreuses a temperatureambiante Reference number ISO 28704:2011(E) TO @ISO 2011 BSISO28704:2011 ISO28704:2011(E) COPYRIGHTPROTECTEDDOCUMENT ISO 2011 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing 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 [email protected] Web www.iso.org Published in Switzerland ii @IsO2011-Allrightsreserved BSISO28704:2011 ISO 28704:2011(E) Contents Page Foreword iv 1 Scope 2 Normative references. 3 Terms and definitions. 4 Testing machine and equipment. 4.1 Testing machine.. 4.2 Loading precision 4.3 Test fixture. 4.4 Micrometer callipersformeasurementof externaldimensions 4.5 Dial gauge.. 4.6 Vernier callipers 5 Testpiece 5.1 Test piece size. 5.2 Test piece preparation. 5 6 Testmethod 6.1 Waveformof loadingstress 5 6.2 Loading method.. 5 6.3 Numberofcyclesforinterruption. 6 6.4 Reuseoftestpiece. 6.5 Recommendedtestprocedureinfatiguetest 6 6.6 Testenvironment.. 7 Treatment of test result.. 7.1 Maximum stress. 7.2 Numberof cycles tofailure 7.3 S-N plot 8 Test report i @ ISO 2011 - All rights reserved BS ISO 28704:2011 ISO 28704:2011(E) Foreword technical committees. Each member body interested in a subject for which a technical committee has been Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. The main task of technical committees is to prepare International Standards. Draft International Standards 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 elements of this document may be the subject of patent rights. IsO shall not be held responsible for identifying any or all such patent rights. ISO28704waspreparedbyTechnical CommitteeISO/TC206,Fineceramics. iv @ISO 2011All rights reserved BS ISO 28704:2011 INTERNATIONALSTANDARD ISO 28704:2011(E) Fineceramics(advancedceramics,advancedtechnical ceramics) Test method for cyclic bending fatigue of porous ceramics at roomtemperature 1 Scope This International Standard spedifies a test method for determining the cyclic four-point bending fatigue of porous ceramics in air at room temperature. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edi