BS-EN-12958-2000.pdf

BRITISH STANDARD BS EN 12958:2000 Incorporating Amendment No. 1 Footwear Test methods for shanks Fatigue resistance The European Standard EN 12958:2000, with the incorporation of amendment A1:2004, has the status of a British Standard ICS 61.060 ? Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12958:2000 This British Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 May 2000 © BSI 6 July 2004 ISBN 0 580 34280 8 National foreword This British Standard is the official English language version of EN 12958:2000, including amendment A1:2004. The UK participation in its preparation was entrusted to Technical Committee TCI/69, Footwear and leather, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 5 and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No.DateComments 150486 July 2004Replacement of text in Clause 1 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 12958 February 2000 + A1 May 2004 ICS 61.060 English version Footwear Test methods for shanks Fatigue resistance (includes amendment A1:2004) Chaussures Méthodes dessai pour cambrions Résistance à la fatigue (inclut lamendement A1:2004) Schube Prüfverfahren für Gelenke Ermüdungswiderstand (enthält Änderung A1:2004) This European Standard was approved by CEN on 1 January 2000; Amendment A1 was approved by CEN on 2 March 2004. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comité Européen de Normalisation Europäisches Komitee für Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels © 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members Ref. No. EN 12958:2000 + A1:2004 E Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12958:2000 © BSI 6 July 20042 Foreword This European Standard has been prepared by Technical Committee CEN/TC 309, Footwear, the Secretariat of which is held by AFNOR. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2000, and conflicting national standards shall be withdrawn at the latest by August 2000. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Foreword to amendment A1 This document (EN 12958:2000/A1:2004) has been prepared by Technical Committee CEN/TC 309, Footwear, the Secretariat of which is held by AENOR. This amendment to the European Standard EN 12958:2000/A1:2004 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by November 2004, and conflicting national standards shall be withdrawn at the latest by November 2004. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. Contents Page Foreword2 1Scope3 2Normative references3 3Definitions3 4Apparatus and materials3 5Sampling and conditioning3 6Test method4 7Expression of results4 8Test report4 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12958:2000 © BSI 6 July 2004 3 1 Scope This European Standard specifies a test method for assessing the fatigue resistance of steel shanks of at least 100 mm in length used for the reinforcement of the waist region of womens shoes and of some mens and childrens shoes. NOTESteel shanks below 100 mm in length cannot be reliably tested by this method. 2 Normative references This European Standard incorporates by dated or undated reference, provisions from other publications. These normative references are cited at the appropriate places in the text and the publications are listed hereafter. For dated references, subsequent amendments to or revisions of any of these publications apply to this European Standard only when incorporated in it by amendment or revision. for undated references the latest edition of the publication referred to applies. EN 12222, Footwear Standard atmospheres for conditioning and testing of footwear and components for footwear. 3 Definitions For the purposes of this standard the following definition applies. 3.1 fatigue resistance the resistance of a shank, under specified conditions, to repeated loading cycles 4 Apparatus and materials A test machine shall be used to measure the fatigue resistance of steel shanks. For multi station machines each station shall include the items described in a) to d). a) A fixed lower jaw with flat hardened steel face plates of height 32 mm ± 2 mm and of width suitable to securely clamp the shank. b) An adjustable upper jaw with flat hardened steel face plates with a means of exerting a force of 49 N ± 2 N on the shank perpendicular to the plane of the lower clamp faces at a rate of four cycles per second. One complete cycle being the application of the load in a forward and reverse direction as in a simple harmonic motion. An illustration of suitable upper and lower jaw configuration is given in Figure 1. c) A method of counting the number of complete cycles up to break of the specimen. d) A method of controlling the clamping force of the jaws see items a) and b), to 4 900 N·mm ± 50 N·mm. NOTEA torque wrench is suitable. 5 Sampling and conditioning The test specimen shall be a complete shank. At least four samples of each type of shank shall be tested. Condition samples for 48 h prior to testing in a controlled atmosphere in accordance with EN 12222. Tests shall be carried out in a suitable conditioned atmosphere in accordance with EN 12222, or, where this is not possible tests shall be carried out within 15 minutes of removing the test specimen from the conditioned atmosphere. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12958:2000 4© BSI 6 July 2004 6 Test method The shank is clamped at its rear end as it would be in a shoe and bent as a cantilever beam by an alternating force applied to the shank. The number of loading cycles required to break the shank is termed the fatigue life. Insert the heel end of the shank centrally in the lower jaw see 4a) so that 32 mm of shank are clamped with the end of the shank level with the bottom edge of the jaw and the specimen is perpendicular to the clamping forces of the lower jaw. Close and tighten the lower jaw see 4a) ensuring that the torque exerted at the upper edge of the jaw is 4 900 N·mm by using a device according to 4d). Such a high torque does not need to be applied to the lower edge of the clamp, but apply sufficient to ensure that the lower edge is secure and that the faces of the jaws remain parallel. Place the upper jaw see 4b) on the specimen so that the distance between the top edge of the lower clamp see 4a) and the centre of the upper jaw see 4b) is 70 mm ± 2 mm. Uniformly close and tighten the upper jaw see 4b) ensuring that the total torque exerted is 4 900 N·mm see 4d). 7 Expression of results Operate the testing machine and record the total number of load cycles as each specimen breaks. For each specimen report the total number of load cycles to break and calculate the arithmetic mean of the four results. 8 Test report The test report shall include the following information: a) results, expressed in accordance with Clause 7; b) reference to this test method; c) full description of the samples tested including commercial styles codes, colours, nature, etc.; d) the number of test specimens if other than four; e) any deviations from this standard method; f) date of testing. Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 12958:2000 © BSI 6 July 2004 5 Figure 1 Licensed Copy: sheffieldun sheffieldun, na, Sat Oct 28 08:42:18 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 12958:2000 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. 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