ISO-24213-2008.pdf
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1、 Reference number ISO 24213:2008(E) ISO 2008 INTERNATIONAL STANDARD ISO 24213 First edition 2008-03-01 Metallic materials Sheet and strip Method for springback evaluation in stretch bending Matriaux mtalliques Tles et bandes Mthodes dvaluation du retour lastique lors dun cintrage sous traction Copyr
2、ight International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 02:47:53 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24213:2008(E) PDF disclaimer This PDF file may contain embedded t
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5、ptimized for printing. Every care has been taken to ensure that the file is suitable for use by ISO member bodies. In the unlikely event that a problem relating to it is found, please inform the Central Secretariat at the address given below. COPYRIGHT PROTECTED DOCUMENT ISO 2008 All rights reserved
6、. 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 ISOs member body in the country of the requester.
7、 ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2008 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licens
8、ee=Boeing Co/5910770001 Not for Resale, 07/25/2008 02:47:53 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24213:2008(E) ISO 2008 All rights reserved iii Contents Page Foreword iv Introduction v 1 Scope . 1 2 Normative references. 1 3 Terms and definitions. 1 4 Symbols
9、 and designations 3 5 Principle. 3 6 Test apparatus 3 7 Test piece 5 8 Procedure 5 9 Test report . 6 Annex A (normative) Method for calculating blank holding pressure 7 Annex B (normative) Method for calculating nominal tensile stress . 9 Annex C (normative) Device for determining radius of curvatur
10、e using a dial gauge 10 Bibliography. 11 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 02:47:53 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24213:2008(E) iv IS
11、O 2008 All rights reserved Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested
12、 in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Comm
13、ission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technic
14、al 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 sha
15、ll not be held responsible for identifying any or all such patent rights. ISO 24213 was prepared by Technical Committee ISO/TC 164, Mechanical testing of metals, Subcommittee SC 2, Ductility testing. Copyright International Organization for Standardization Provided by IHS under license with ISO Lice
16、nsee=Boeing Co/5910770001 Not for Resale, 07/25/2008 02:47:53 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 24213:2008(E) ISO 2008 All rights reserved v Introduction This International Standard has been established to evaluate the amount of springback occurring in met
17、allic sheets deformed by stretch-bending. It may be used for specifying a material, directly controlling a forming operation, designing dies, or calibrating finite element programs. In metallic sheet forming processes, the geometry of the formed parts may deviate from the design geometry after the p
18、arts are removed from the dies due to elastic recovery. This phenomenon is referred to as springback. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 02:47:53 MDTNo reproduction or networking per
19、mitted without license from IHS -,-,- Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 02:47:53 MDTNo reproduction or networking permitted without license from IHS -,-,- INTERNATIONAL STANDARD ISO
20、 24213:2008(E) ISO 2008 All rights reserved 1 Metallic materials Sheet and strip Method for springback evaluation in stretch bending 1 Scope This International Standard specifies a method for evaluating the amount of springback of sheets of metallic materials known to exhibit large amounts of spring
21、back subjected to plane-strain stretch bending, which is a typical deformation mode generated in press-formed panels. By using this method, the amount of springback under stretch bending is evaluated accurately and quantitatively. 2 Normative references The following referenced documents relate to t
22、he application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 31-0, Quantities and units Part 0: General principles 3 Terms and definitions For the purposes of this
23、document, the following terms and definitions apply. 3.1 curvature reciprocal of the radius of curvature r determined at the centre of a stretch-bent specimen on the inner surface in the longitudinal direction 1 r = (1) 3.2 amount of springback relative change in curvature of a test piece under forc
24、e and after removal of the force shown in Figure 1 rr r = (2) Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Boeing Co/5910770001 Not for Resale, 07/25/2008 02:47:53 MDTNo reproduction or networking permitted without license from IHS -,-,- IS
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