《ISO-3377-2-2002.pdf》由会员分享，可在线阅读，更多相关《ISO-3377-2-2002.pdf（8页珍藏版）》请在三一文库上搜索。
1、 Reference number ISO 3377-2:2002(E) IULTCS/IUP 8 ISO 2002 INTERNATIONAL STANDARD ISO 3377-2 IULTCS/IUP 8 First edition 2002-12-15 Leather Physical and mechanical tests Determination of tear load Part 2: Double edge tear Cuir Essais physiques et mcaniques Dtermination de la force de dchirement Parti
2、e 2: Dchirement des deux bords Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3377-2:2002(
3、E) PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes 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 downloading this fil
4、e, parties accept therein the responsibility of not infringing Adobes licensing policy. The ISO Central Secretariat 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 re
5、lative to the file; the PDF-creation parameters were optimized 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. ISO
6、 2002 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 ISOs member body in the
7、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 copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2002 All rights reserved Copyright International Organization for Standardization Provided by IHS unde
8、r license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3377-2:2002(E) ISO 2002 All rights reserved iii Contents Page Foreword.iv 1Scope 1 2Normative references 1 3Principle1 4
9、Apparatus .1 5Sampling and sample preparation.2 6Procedure .2 7Test report 3 Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTNo reproduction or networking permitted w
10、ithout license from IHS -,-,- ISO 3377-2:2002(E) iv ISO 2002 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
11、 ISO technical committees. Each member body interested 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 collaborate
12、s closely with the International Electrotechnical Commission (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
13、. 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
14、 document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 3377-2 was prepared by the Physical Test Commission of the International Union of Leather Technologists and Chemists Societies (IUP Commission, IULTCS) in collaboration
15、 with the European Committee for Standardization (CEN) Technical Committee CEN/TC 289, Leather, the secretariat of which is held by UNI, in accordance with the Agreement on technical cooperation between ISO and CEN (Vienna Agreement). It is based on IUP 8 originally published in J. Soc. Leather Trad
16、es Chemists 44, p. 368, (1960) and declared an official method of the IULTCS in 1961. This updated version was published in J. Soc. Leather Tech. Chem. 84, p. 327, (2000) and reconfirmed as an official method in March 2001. The same principle is used but the text has been updated and includes the nu
17、mber of test pieces to be taken. Together with part 1 (see below), this part of ISO 3377 cancels and replaces ISO 3377:1975, which has been technically revised. ISO 3377 consists of the following parts, under the general title Leather Physical and mechanical tests Determination of tear load: Part 1:
18、 Single edge tear Part 2: Double edge tear Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTNo reproduction or networking permitted without license from IHS -,-,- INTE
19、RNATIONAL STANDARD ISO 3377-2:2002(E) ISO 2002 All rights reserved 1 Leather Physical and mechanical tests Determination of tear load Part 2: Double edge tear 1 Scope This part of ISO 3377 specifies a method for determining the tear strength of leather using a double edged tear. The method is someti
20、mes described as the Baumann tear. It is applicable to all types of leather. 2 Normative references ISO 2418Leather - Chemical, physical and mechanical and fastness tests - Sampling location ISO 2419Leather - Physical and mechanical tests - Sample preparation and conditioning ISO 2589Leather - Physi
21、cal and mechanical tests - Determination of thickness ISO 7500-1 Metallic materials Verification of static uniaxial testing machines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system 3 Principle A rectangular test piece with a hole of specified s
22、hape is placed over the turned up ends of a pair of holders attached to the jaws of a tensile testing machine. The highest force exerted during tearing of the test piece is recorded. 4 Apparatus 4.1Tensile testing machine, with: ? a force range appropriate to the specimen under test; ? a means of re
23、cording the force to an accuracy of at least 2% as specified by Class 2 of ISO 7500-1; ? a uniform speed of separation of the jaws of 100 mm/min 20 mm/min. 4.2Test piece holders, such as shown in figure 1, each consisting of a strip of steel 10 mm 0,1 mm wide and 2 mm 0,1 mm thick, bent through a ri
24、ght angle at one end to form a rigid strip with a minimum length of 12 mm ? 0,1 mm. The holders either fit into or replace the jaws of the tensile testing machine (4.1). 4.3Thickness gauge, as specified in ISO 2589. 4.4 Press knife, as specified in ISO 2419, capable of cutting a test piece as shown
25、in figure 2 in one operation. All parts of the press knife shall lie in the same plane. The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced docume
26、nt (including any amendments) applies. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3377
27、-2:2002(E) 2 ISO 2002 All rights reserved Figure 1 Test piece holders Figure 2 Test piece for double edge tear (all dimensions in millimetres 1mm, R=radius) 5 Sampling and sample preparation 5.1 Sample in accordance with ISO 2418. From the sample, cut 6 test pieces in accordance with ISO 2419, 3 tes
28、t pieces with the longer sides parallel to the backbone and 3 test pieces with the longer sides perpendicular to the backbone. NOTE If there is a requirement for more than two hides or skins to be tested in one batch, then only one test piece in each direction need be taken from each hide or skin, p
29、rovided that the overall total is not less than three test pieces in each direction. 5.2Condition the test pieces in accordance with ISO 2419. 5.3Measure the thickness of the test pieces in accordance with ISO 2589. 6 Procedure 6.1Adjust the apparatus so that the turned up ends of the test piece hol
30、ders are lightly touching each other. Slip the test piece over the turned up ends so that the ends protrude through the slot with the width of the turned up ends parallel to the straight edges of the slot. Press the test piece firmly onto the holders. 6.2Run the tensile test machine until the test p
31、iece is torn apart and record the maximum force reached during tearing. 6.3Repeat 6.1 and 6.2 for other test pieces. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTN
32、o reproduction or networking permitted without license from IHS -,-,- ISO 3377-2:2002(E) ISO 2002 All rights reserved 3 7 Test report The test report shall include the following: a) reference to this part of ISO 3377, i.e. ISO 3377-2:2002; b) the thickness of the leather in mm; c) the mean tear load
33、 in Newtons (N) with the long edge of the test piece cut parallel to the backbone; d) the mean tear load in Newtons (N) with the long edge of the test piece cut perpendicular to the backbone; e) the average tear load (i.e., the arithmetic mean of c and d); f) the standard atmosphere used for conditi
34、oning and testing, as given in ISO 2419 (i.e. 20 ?C/65 % relative humidity, or 23?C/50 % relative humidity); g) any deviations from the method specified in this part of ISO 3377; h) full details for identification of the sample and any deviations from ISO 2418 with respect to sampling. Copyright Int
35、ernational Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO 3377-2:2002(E) ICS 59.140.30 Price based on 3 pages ISO 2002 All rights reserved Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=NASA Technical Standards 1/9972545001 Not for Resale, 04/25/2007 06:26:27 MDTNo reproduction or networking permitted without license from IHS -,-,-