AECMA PREN 3475-505-2006 Aerospace series Cables electrical aircraft use Test methods Part 505 Tensile test on conductors and strands Edition P 2《航天系列 飞行器用的电缆试验方法.第505部分 导线和绞线的拉伸试验.pdf

1、ASD STANDARD NORME ASD ASD NORM prEN 3475-505 Edition P 2 September 2006 PUBLISHED BY THE AEROSPACE AND DEFENCE INDUSTRIES ASSOCIATION OF EUROPE - STANDARDIZATION Gulledelle 94 - B-1200 Brussels - Tel. + 32 2 775 8126 - Fax. + 32 2 763 3565 - www.asd-stan.orgICS: 49.060 Supersedes issue P 1 of Augus

2、t 1992 and will supersede EN 3475-505:2002 Descriptors: ENGLISH VERSION Aerospace series Cables, electrical, aircraft use Test methods Part 505: Tensile test on conductors and strands Srie arospatiale Cbles lectriques usage aronautique Mthodes dessais Partie 505 : Rsistance la traction des conducteu

3、rs et des brins Luft- und Raumfahrt Elektrische Leitungen fr Luftfahrtverwendung Prfverfahren Teil 505: Zugfestigkeit der Einzeldrhte und Leiterseile This “Aerospace Series“ Prestandard has been drawn up under the responsibility of ASD-STAN (The AeroSpace and Defence Industries Association of Europe

4、 - Standardization). It is published for the needs of the European Aerospace Industry. It has been technically approved by the experts of the concerned Domain following member comments. Subsequent to the publication of this Prestandard, the technical content shall not be changed to an extent that in

5、terchangeability is affected, physically or functionally, without re-identification of the standard. After examination and review by users and formal agreement of ASD-STAN, it will be submitted as a draft European Standard (prEN) to CEN (European Committee for Standardization) for formal vote and tr

6、ansformation to full European Standard (EN). The CEN national members have then to implement the EN at national level by giving the EN the status of a national standard and by withdrawing any national standards conflicting with the EN. Edition approved for publication 30 September 2006 Comments shou

7、ld be sent within six months after the date of publication to ASD-STAN Electrical Domain Copyright 2006 by ASD-STAN Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license

8、 from IHS-,-,-prEN 3475-505:20062 Contents Page Foreword2 1 Scope 3 2 Normative references 3 3 Definitions 3 3.1 Ultimate tensile strength or Tensile strength at break 3 3.2 Ultimate elongation or Elongation at break 3 3.3 Elastic limit or Yield strength Offset yield strength or Conventional elastic

9、 limit.3 4 Apparatus .4 5 Method 4 5.1 Strands4 5.2 Conductors.4 6 Requirements.4 Foreword This standard was reviewed by the Domain Technical Coordinator of ASD-STANs Electrical Domain. After inquiries and votes carried out in accordance with the rules of ASD-STAN defined in ASD-STANs General Proces

10、s Manual, this standard has received approval for Publication. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-505:20063 1 Scope This standa

11、rd specifies a method of measuring the tensile properties of strands and conductors. When required, it can be used also on finished wires. It shall be used together with EN 3475-100. 2 Normative references The following referenced documents are indispensable for the application of this document. For

12、 dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 3475-100, Aerospace series Cables, electrical, aircraft use Test methods Part 100: General. 3 Definitions 3.1 Ultimate tensile strength or T

13、ensile strength at break The ultimate 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). Th

14、is point is the fracture marked X on the curve below. (see Figure 1). Stress Strain Fracture Plastic regionX Elastic region Figure 1 3.2 Ultimate elongation or Elongation at break The Ultimate elongation also called Elongation at break is the elongation of material at rupture under tensile loading.

15、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 exhibit a permanent deform

16、ation and is a practical approximation of elastic limit. Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-prEN 3475-505:20064 The values for elongation

17、 at break, tensile strength at break and elastic limit (when required) shall conform to those given in the product standard. 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-strai

18、n curve, and a line parallel to its straight line 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). StressStrainRp0,2% FracturePlastic regionX Elastic region 0,2

19、 % Figure 2 4 Apparatus The test shall be carried out with the aid of a tensile tester capable of measuring the specified elongation between the jaws with an accuracy of 1 %. The pulling speed shall be (50 10) mm/min. The initial length of the test specimen between the jaws shall be (200 5) mm. 5 Me

20、thod 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 Measure three samples per size. These s

21、amples shall be firmly gripped and pulled without jerking. Report values of the elongation and tensile strength at the first strand breaking. 6 Requirements Copyright Association Europeene des Constructeurs de Materiel Aerospatial Provided by IHS under license with AECMA Not for ResaleNo reproduction or networking permitted without license from IHS-,-,-