1、raising standards worldwideNO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAWBSI Standards PublicationBS EN 3238:2010Aerospace series Metallicmaterials Test method Shear test for wires and rivetsBS EN 3238:2010 BRITISH STANDARDNational forewordThis British Standard is the UK impl
2、ementation of EN 3238:2010.The UK participation in its preparation was entrusted to TechnicalCommittee ACE/61/-/6, Mechanical Testing of Metallic Materials forAerospace Purposes.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not
3、 purport to include all the necessaryprovisions of a contract. Users are responsible for its correctapplication. BSI 2010ISBN 978 0 580 70738 4ICS 49.030.99Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the authority of theSt
4、andards Policy and Strategy Committee on 30 November 2010.Amendments issued since publicationDate Text affectedBS EN 3238:2010EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 3238 October 2010 ICS 49.030.99 English Version Aerospace series - Metallic materials - Test method - Shear test for wire
5、s and rivets Srie arospatiale - Matriaux mtalliques - Mthodes dessais - Essai de cisaillement pour fils et rivets Luft- und Raumfahrt - Metallische Werkstoffe - Prfverfahren - Prfung der Scherfestigkeit von Drhten und Nieten This European Standard was approved by CEN on 5 May 2010. CEN members are b
6、ound 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
7、 CEN 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 notified to the CEN Management Centre has the same s
8、tatus 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, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu
9、gal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2010 CEN All rights of exploitation in any form and by any means
10、reserved worldwide for CEN national Members. Ref. No. EN 3238:2010: EBS EN 3238:2010EN 3238:2010 (E) 2 Contents Page Foreword 3Introduction .41 Scope 52 Normative references 5Terms, .53 definitions, parameters and symbols 53.1 General terms .53.2 Other terms .53.2.1 Shear strength 53.2.2 Parameters
11、and symbols 64 Health and safety .65 Principle 66 Testing requirements 66.1 Resources .66.1.1 Equipment/plant .66.1.2 Materials/reagents .86.1.3 Qualification of personnel 86.2 Test samples/test pieces Test piece dimensions 86.3 Testing procedure86.3.1 Temperature of test .86.3.2 Method of test 86.4
12、 Expression of results 87 Test report 8BS EN 3238:2010EN 3238:2010 (E) 3 Foreword This document (EN 3238:2010) has been prepared by the Aerospace and Defence Industries Association of Europe - Standardization (ASD-STAN). After enquiries and votes carried out in accordance with the rules of this Asso
13、ciation, 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 shall be given the status of a national standard, either by publication of an identical text or by endorsem
14、ent, at the latest by April 2011, and conflicting national standards shall be withdrawn at the latest by April 2011. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying
15、any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Gr
16、eece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. BS EN 3238:2010EN 3238:2010 (E) 4 Introduction This standard is part of the series of EN metallic mater
17、ial standards for aerospace applications. The general organization of this series is described in EN 4258. BS EN 3238:2010EN 3238:2010 (E) 5 1 Scope This standard specifies the requirements for shear testing rivet wire and rivets in metallic materials for aerospace applications. It shall be applied
18、when referred to in the EN technical specification or material standard unless otherwise specified on the drawing, order or inspection schedule. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition ci
19、ted applies. For undated references, the latest edition of the referenced document (including any amendments) applies. EN 4259, Aerospace series Metallic materials Definition of general terms 1)EN ISO 7500-1, Metallic materials Verification of static uniaxial testing machines Part 1: Tension/ compre
20、ssion testing machines Verification and calibration of the force-measuring system (ISO 7500-1:2004) ISO 286-1:1988, ISO system of limits and fits Part 1: Bases of tolerances, deviations and fits 3 Terms, definitions, parameters and symbols For the purposes of this standard, the terms and definitions
21、 given in EN 4259 and the parameters and symbols given in Table 1 apply. 3.1 General terms See EN 4259. 3.2 Other terms 3.2.1 Shear strength Shear strength (Rc) is given by: Rc = omSF2or 2omc2dFR = where d0 is the original diameter of the test piece; Fm is the maximum force; So is the original cross
22、-sectional area of the test piece. 1) Published as ASD Pre-Standard at the date of publication of this standard. BS EN 3238:2010EN 3238:2010 (E) 6 3.2.2 Parameters and symbols See Table 1. Table 1 Parameters and symbols Symbol Unit Parameter d0mm Original diameter of the test piece d1mm Inside diame
23、ter of the inner shearing device d2mm Outside diameter of the inner shearing device FmN The maximum force which the test piece withstands during the test h mm Distance between bottom of housing and lower part of inner shearing device l1mm Length of the outer shearing device l2mm Length of the inner
24、shearing device Lmin.mm Minimum length of the test piece RcMPa Shear strength The maximum force (Fm) divided by twice the original cross-sectional area (S0) of the test piece S0mm2Original cross-sectional area of the test piece 4 Health and safety Resources, test pieces, test samples, test materials
25、, test equipment and test procedures shall comply with the current health and safety regulations/laws of the countries where the test is carried out. Where equipment, materials and/or reagents which may be hazardous to health are specified, appropriate precautions in conformity with local regulation
26、s/laws shall be taken. 5 Principle The shear test consists in subjecting a wire, rivet or test piece of circular cross-section to shearing in double shear. 6 Testing requirements 6.1 Resources 6.1.1 Equipment/plant a) Tensile or compression testing machines verified in accordance with EN ISO 7500-1;
27、 b) shearing device for compression testing machine (see Figures 1 and 3); c) shearing device for tensile testing machine (see Figures 2 and 3); d) shearing devices shall consist of the following components: BS EN 3238:2010EN 3238:2010 (E) 7 1) housing (1); 2) housing socket (2); 3) slide (3); 4) sl
28、ide socket (4). The dimensions are shown in Table 2. Shearing device sockets (2) and (4) of Figure 3 shall have a hardness of: 5) for aluminium and aluminium alloys, 500 HV minimum; 6) for other alloys, 700 HV minimum. The shearing devices need not conform to the pictorial representation but the dim
29、ensions specified and surface roughness shall be maintained. Table 2 Dimensions Shearing devicesShearing device corresponding to tolerance zone a Test piece d1Tol. d2h L1L2d0Tol. L min. min.12 + 0,100 0 H12 303515202 0,020 0,370 50 3 3 4 + 0,120 0 4 0,030 0,390 5 5 6 + 0,075 0 H11 6 0,030 0,345 8 +
30、0,090 0 8 0,040 0,370 210 + 0,022 0 H84550305010 0,013 0,186 11012 + 0,027 0 12 0,016 0,193 14 1416 163 18 + 0,033 0 H8 45 50 40 50 18 0,016 0,193 13020 20 0,020 0,212 25 25aAccording to ISO 286-1:1988. NOTE If the actual size of wire (d0) is different from dimensions given in Table 2, a shearing de
31、vice with an appropriate inside diameter (d1) consistent with other parameters of Table 2 should be used. BS EN 3238:2010EN 3238:2010 (E) 8 6.1.2 Materials/reagents Degreasing fluids; test record sheet or test log book or equivalent. 6.1.3 Qualification of personnel Testing to the requirements of th
32、is test method shall only be undertaken and/or supervised by personnel who have demonstrated their competence by a suitable education and appropriate training and experience. 6.2 Test samples/test pieces Test piece dimensions Unless otherwise specified by the technical or material standard, drawing
33、or order, cylindrical test pieces (wire or rivets) with an original diameter (d0) and length (Lmin.) according to Table 2 shall be used. Where possible, products shall be tested in full section, however for materials with a tensile strength exceeding 1 000 MPa, it is permissible for test pieces of d
34、iameter (d0) within the range 2 mm to 16 mm taken from the product to be used. The test piece axis shall be d0/2. NOTE There are currently no rivet wire standards in the ASD-STAN series specifying greater than 10 mm diameter. 6.3 Testing procedure 6.3.1 Temperature of test The test shall be carried
35、out at 10 C 35 C, unless otherwise specified. In cases of dispute, the test shall be performed at = (23 5) C. 6.3.2 Method of test 6.3.2.1 Place the shearing device with sockets corresponding to the original test piece diameter (d0) in the machine so that the vertical axis of the device coincides wi
36、th the line of action of the test force. 6.3.2.2 Set the force indicator to zero before inserting the test piece in the shearing device. Check that during motion of the slide (3) frictional forces are sufficiently low as to cause negligible deviation of the force indicator. 6.3.2.3 Measure the origi
37、nal test piece diameter (d0) of the test piece to an accuracy of 0,01 mm. 6.3.2.4 Place the test piece in the shearing device and increase the force slowly until failure. Record the maximum force and determine the shear strength in accordance with 3.2.1. 6.3.2.5 After testing remove the sheared part
38、s of the test piece taking care that no fragments remain in the sockets (2) and (4). 6.4 Expression of results Results shall be expressed as specified in the relevant technical standard, drawing or order. 7 Test report All results shall be in written form and the test report shall include, when rele
39、vant, at least the following information: BS EN 3238:2010EN 3238:2010 (E) 9 reference to this test method; any other information relevant to the test method(s) (e.g. test condition, test equipment, test procedure, verification, etc.); identification and traceability of the semi-finished product to b
40、e tested in accordance with the technical specification; identification and traceability of test samples taken from the semi-finished product (e.g. location, orientation, size); identification and traceability of test pieces taken from test samples (e.g. number, preparation, method, condition). In c
41、ertain cases the test piece may be the test sample: expression of results (e.g. individual values or mean values, units, etc.); recorded plots/graphs, when necessary; date of test; traceability to individual performing the test work; any incident which may have affected the results; any deviation fr
42、om the test method standard. Key 1 Test piece Key 1 Test piece Figure 1 Shearing device for compression testing machine Figure 2 Shearing device for tensile testing machine BS EN 3238:2010EN 3238:2010 (E) 10 Key 1 One hardened socket in slide 2 Slide 3 Only points to section through slide 4 Only poi
43、nts to section through housing 5 Test piece 6 Lock screw 7 Housing 8 Two hardened sockets in housing Figure 3 Assembly of shear test device This page deliberately left blankBSI is the independent national body responsible for preparing British Standardsand other standards-related publications, infor
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