BS EN 3475-505-2012 Aerospace series Cables electrical aircraft use Test methods Tensile test on conductors and strands《航空航天系列 飞行器用电缆 试验方法 导线和绞线的抗拉试验》.pdf

1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 3475-505:2012Aerospace series Cables, electrical, aircraft use Test methodsPart 505: Tensile test on conductors and strandsBS EN 3475-505:2012 BRITISH STANDARDNational fore

2、wordThis British Standard is the UK implementation of EN 3475-505:2012. It supersedes BS EN 3475-505:2007, which is withdrawn.The UK participation in its preparation was entrusted to T e c h n i c a l C o m m i t t e e A C E / 6 , A e r o s p a c e a v i o n i c e l e c t r i c a l a n d fibre optic

3、 technology.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. The British Standards Institution 2012Published by

4、 BSI Standards Limited 2012ISBN 978 0 580 75522 4 ICS 49.060 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 31 March 2012.Amendments issued since publicationDat

5、e T e x t a f f e c t e dBS EN 3475-505:2012EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3475-505 March 2012 ICS 49.060 Supersedes EN 3475-505:2007English Version Aerospace series - Cables, electrical, aircraft use - Test methods - Part 505: Tensile test on conductors and strands Srie arospa

6、tiale - Cbles lectriques usage aronautique - Mthodes dessais - Partie 505: Rsistance la traction des conducteurs et des brins Luft- und Raumfahrt - Elektrische Leitungen fr Luftfahrtverwendung - Prfverfahren - Teil 505: Zugfestigkeit der Einzeldrhte und Leiterseile This European Standard was approve

7、d by CEN on 20 August 2011. 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 st

8、andards may be obtained on application to the CEN-CENELEC Management Centre 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

9、 notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lit

10、huania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Bruss

11、els 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 3475-505:2012: EBS EN 3475-505:2012EN 3475-505:2012 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Apparatus .55 Method 65.1 Stran

12、ds 65.2 Conductors .66 Requirements .6Annex A (normative) Test method: Braid strength measured after separation from finished cable .7BS EN 3475-505:2012EN 3475-505:2012 (E) 3 Foreword This document (EN 3475-505:2012) has been prepared by the Aerospace and Defence Industries Association of Europe -

13、Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Association, this Standard has received the approval of the National Associations and the Official Services of the member countries of ASD, prior to its presentation to CEN. This European Standard

14、shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2012, and conflicting national standards shall be withdrawn at the latest by September 2012. Attention is drawn to the possibility that some of the elements of t

15、his document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. This document will supersede EN 3475-505:2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following co

16、untries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sl

17、ovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. BS EN 3475-505:2012EN 3475-505:2012 (E) 4 1 Scope This European Standard specifies a method of measuring the tensile properties of strands, conductors and braids. When required, it can be used also on cables. It should be used togeth

18、er with EN 3475-100. 2 Normative references The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document

19、 (including any amendments) applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 ultimate tensile strength or tensile strength at break the ulti

20、mate tensile strength also called the tensile strength at break of a material is the limit stress at which the material actually breaks, with sudden release of the stored elastic energy (released as noise and/or heat and/or more cracks e.g. for brittle materials). This point is the fracture marked X

21、 on the curve below. (see Figure 1). Key 1 Elastic region 2 Plastic region 3 Fracture X Strain Y Stress Figure 1 BS EN 3475-505:2012EN 3475-505:2012 (E) 5 3.2 ultimate elongation or elongation at break the ultimate elongation also called elongation at break is the elongation of material at rupture u

22、nder tensile loading 3.3 elastic limit or yield strength offset yield strength or conventional elastic limit the elastic limit also called yield strength is the maximum stress that can be developed in a material without causing plastic deformation. It is the stress at which a material start to exhib

23、it a permanent deformation and is a practical approximation of elastic limit. Offset yield strength also called Conventional elastic limit is determined from a stress-strain diagram. It is the stress corresponding to the intersection of the stress-strain curve, and a line parallel to its straight li

24、ne portion offset by a specified strain. Offset for metals are specified as 0,2 % (Rp0,2%), i.e., the intersection of the offset line and the 0-stress axis is at 0,2 % strain. (see Figure 2). Key 1 Elastic region 2 Plastic region 3 Fracture X Strain Y Stress Figure 2 4 Apparatus The test shall be ca

25、rried out with the aid of a tensile tester capable of measuring the specified elongation with an accuracy of 1 %. The pulling speed shall be (50 10) mm/min. The initial length of the test specimen between the joints shall be (200 5) mm. For tensile strength of braids, see Annex A (normative). BS EN

26、3475-505:2012EN 3475-505:2012 (E) 6 5 Method 5.1 Strands Measure three strands per size, taken from the complete conductor except for: copper alloy sizes 0,15 mm2and 0,25 mm2; and aluminium or copper clad aluminium from sizes 0,2 mm2to 5 mm2; where the whole conductor shall be pulled. 5.2 Conductors

27、 Measure three samples per size. These samples shall be firmly gripped and pulled without jerking. Report values of the elongation and tensile strength at the first strand breaking. 6 Requirements The values for elongation at break, tensile strength at break and elastic limit (when required) shall c

28、onform to those given in the product standard. BS EN 3475-505:2012EN 3475-505:2012 (E) 7 Annex A (normative) Test method: Braid strength measured after separation from finished cable The cable jacket is carefully stripped on a length of about 500 mm without any damage to the shield(s) strands. Then,

29、 the braid(s) is fully pulled off from these three samples. Each of three of these samples is firmly gripped and pulled without jerking. The recommended test equipment is shown by Figure A.1. Figure A.1 The applied tensile force shall be monitored and recorded. Report values of the tensile strength

30、at the first strand break. Calculate the average values S1 from the 3 measurements. The tensile strength at break of the braid(s) is S1. This page deliberately left blankThis page deliberately left blankBSI is the independent national body responsible for preparing British Standards and other standa

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