1、BSI Standards PublicationBS EN ISO 12996:2013Mechanical joining Destructive testing of joints Specimen dimensions andtest procedure for tensile sheartesting of single joints (ISO12996:2013)BS EN ISO 12996:2013 BRITISH STANDARDNational forewordThis British Standard is the UK implementation of EN ISO1
2、2996:2013.The UK participation in its preparation was entrusted to TechnicalCommittee WEE/29, Resistance welding.A list of organizations represented on this committee can beobtained on request to its secretary.This publication does not purport to include all the necessaryprovisions of a contract. Us
3、ers are responsible for its correctapplication. The British Standards Institution 2013. Published by BSI StandardsLimited 2013ISBN 978 0 580 74305 4ICS 25.160.10; 25.160.40Compliance with a British Standard cannot confer immunity fromlegal obligations.This British Standard was published under the au
4、thority of theStandards Policy and Strategy Committee on 31 July 2013.Amendments issued since publicationDate Text affectedEUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 12996 July 2013 ICS 25.160.40; 25.160.10 English Version Mechanical joining - Destructive testing of joints - Specimen d
5、imensions and test procedure for tensile shear testing of single joints (ISO 12996:2013) Assemblage mcanique - Essais destructifs des jonctions -Dimensions des prouvettes et procdures dessai pour essais de traction-cisaillement des jonctions uniques (ISO 12996:2013) Mechanisches Fgen - Zerstrende Pr
6、fung von Verbindungen - Probenmae und Prfverfahren fr die Scherzugprfung von Einpunktproben (ISO 12996:2013) This European Standard was approved by CEN on 15 June 2013. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European S
7、tandard 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 CEN-CENELEC Management Centre or to any CEN member. This European Standard exists in three official versions (Eng
8、lish, 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-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium,
9、 Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerlan
10、d, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2013 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. N
11、o. EN ISO 12996:2013: EBS EN ISO 12996:2013EN ISO 12996:2013 (E) 3 Foreword This document (EN ISO 12996:2013) has been prepared by Technical Committee ISO/TC 44 “Welding and allied processes“ in collaboration with Technical Committee CEN/TC 121 “Welding and allied processes” the secretariat of which
12、 is held by DIN. 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 January 2014, and conflicting national standards shall be withdrawn at the latest by January 2014. Attention is drawn to the possib
13、ility 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 any or all such patent rights. According to the CEN-CENELEC Internal Regulations, the national standards organizations of the following countries are
14、 bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Por
15、tugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 12996:2013 has been approved by CEN as EN ISO 12996:2013 without any modification. BS EN ISO 12996:2013ISO 12996:2013(E) ISO 2013 All rights reserved iiiContents PageFore
16、word iv1 Scope . 12 Normative references 13 Terms and definitions . 14 Test specimens and types of tests . 35 Test equipment and test procedure 46 Failure modes and force-displacement curves . 57 Test report . 5Annex A (normative) Types of joint failure . 7Bibliography .16BS EN ISO 12996:2013ISO 129
17、96:2013(E)ForewordISO (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 ISO technical committees. Each member body interested in a subject for
18、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 collaborates closely with the International Electrotechnical Commission (IEC) on al
19、l matters of electrotechnical standardization.The procedures used to develop this document and those intended for its further maintenance are described in the ISO/IEC Directives, Part 1. In particular the different approval criteria needed for the different types of ISO documents should be noted. Th
20、is document was drafted in accordance with the editorial rules of the ISO/IEC Directives, Part 2, www.iso.org/directives.Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all
21、such patent rights. Details of any patent rights identified during the development of the document will be in the Introduction and/or on the ISO list of patent declarations received, www.iso.org/patents.Any trade name used in this document is information given for the convenience of users and does n
22、ot constitute an endorsement.The committee responsible for this document is ISO/TC 44, Welding and allied processes, Subcommittee SC 6, Resistance welding and allied mechanical joining.Requests for official interpretations of any aspect of this International Standard should be directed to the Secret
23、ariat of ISO/TC 44/SC 6 via your national standards body. A complete listing of these bodies can be found at www.iso.org.iv ISO 2013 All rights reservedBS EN ISO 12996:2013INTERNATIONAL STANDARD ISO 12996:2013(E)Mechanical joining Destructive testing of joints Specimen dimensions and test procedure
24、for tensile shear testing of single joints1 ScopeThis International Standard specifies the geometry of the test specimens and the procedure for the tensile shear testing of single mechanical joints on single and multilayer specimens up to a single sheet thickness of 4,5 mm.The term sheet, as used in
25、 this International Standard, includes extrusions and cast materials.The purpose of the tensile shear test is to determine the mechanical characteristics and failure modes of the joints made with the different methods.This International Standard does not apply to civil engineering applications such
26、as metal building and steel construction which are covered by other applicable standards.2 Normative referencesThe 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. Fo
27、r undated references, the latest edition of the referenced document (including any amendments) applies.ISO 2768-1, General tolerances Part 1: Tolerances for linear and angular dimensions without individual tolerance indicationsISO 7500-1, Metallic materials Verification of static uniaxial testing ma
28、chines Part 1: Tension/compression testing machines Verification and calibration of the force-measuring system3 Terms and definitionsFor the purpose of this document, the following terms and definitions apply.3.1tensile shear forceFmaxmaximum force recorded in the testNote 1 to entry: If required, f
29、urther characteristic data, e.g. Fp0,2(see 3.2), stiffness of the specimen c (see 3.7) or slope of the force curve, energy dissipation W (see 3.8), can be determined according to the shear diagram given in Figure 4.3.2elastic force limitFeforce where predetermined plastic or permanent displacement o
30、f the test specimen occurs3.3slippage forceFsforce at which a relative movement of the joined parts is registered ISO 2013 All rights reserved 1BS EN ISO 12996:2013ISO 12996:2013(E)3.4displacementschange in the length of a specimen due to the application of a forceSOURCE: ISO 18592:2009,13.15 modifi
31、ed symbol changed; “force” replaces “load”3.5displacement at the tensile shear force FmaxsFmaxamount of displacement measured at tensile shear force Fmax3.6displacement at 0,3FmaxsF03,maxamount of displacement measured at 0,3Fmax3.7stiffness in elastic rangecratio of increase of force to the increas
32、e of elongation in the elastic range (c = F/s)3.8dissipated energyWwork or area under the force curve3.9dissipated energy up to FmaxWFmaxarea under the force curve up to the point of maximum tensile shear force FmaxWFsFssFmaxmax.=d03.10dissipated energy up to 0,3FmaxWF03,maxarea under the force curv
33、e up to the point where the tensile shear force drops to 30 % of FmaxWFsFssF03003,max,max.=d Note 1 to entry: The 0,3Fmaxlimit was introduced in order to reduce the time for carrying out the tensile shear test, because generally the area under the force curve after 0,3Fmaxdoes not contribute signifi
34、cantly to the dissipated energy.3.11dissipated energy up to fractureWfracturetotal area under the force curveWFsssfracturedfracture=.02 ISO 2013 All rights reservedBS EN ISO 12996:2013ISO 12996:2013(E)3.12interference fit jointform fit jointproperty of a joint in which the transmission of external f
35、orces, in particular shear forces, is effected by geometrical elements which prevent the movement of the components relative to one anotherNote 1 to entry: This condition is frequently achieved by the fasteners outer diameter surface having complete contact with the joints component holes.Note 2 to
36、entry: Compare clearance fit joint (3.13).3.13clearance fit jointforce fit jointnon-interference fit jointproperty of a joint in which external forces, in particular shear forces, are transmitted through friction and if the force to be transmitted is greater than the frictional force, then frictiona
37、l locking is overcome and the components move relative to one anotherNote 1 to entry: This condition is frequently achieved by the fasteners outer diameter surface having incomplete contact with the joints component holes.Note 2 to entry: Compare interference fit joint (3.12).4 Test specimens and ty
38、pes of testsSee Figures 1 and 2.Tolerances according to ISO 2768-1 are applicable to the dimensions of the specimens given in Table 1.Keya overlap lstotal length of specimen t1, t2sheet thicknessb coupon width lgspecimen length between clamps 1 shim plateslclength of clamped area ltcoupon length 2 m
39、echanical jointFigure 1 Single-lap tensile shear test specimens ISO 2013 All rights reserved 3BS EN ISO 12996:2013ISO 12996:2013(E)Key1 shim platesFigure 2 Examples of different sheet testing arrangements for tensile shear test specimensAlternative specimen size, stacking order of the sheets, the jo
40、ining direction shall be agreed upon between the contracting parties and indicated in the test report.The appropriate size and tolerance of the hole is determined based on the selected fastener.Table 1 Specimen dimensionsThickness of sheet Minimum overlap Minimum speci-men widthLength of clamped are
41、aSpecimen length between clampst1;t2a b lclgmm mm mm4,5 5d 7d 45 95NOTE Total specimen length, ls= lg+ 2lc, where the length of the clamped area is to be selected in accordance with the testing machine being used.d Nominal diameter of the fastener or width or diameter of the clinching die.5 Test equ
42、ipment and test procedureClamp the test specimen in a tensile testing machine according to ISO 7500-1, in such a manner that the clamps are at the required distance from one another. For sheet thicknesses 1 mm or where the ratio of the thicknesses is 1,4, shim plates shall be used for clamping the t
43、est specimen in the grips of the tensile testing machine to ensure force concentricity see Figure 3 b) and c). Shim plates can be joined by suitable joining method, e.g. resistance spot welding, adhesive bonding.NOTE 1 If identical test results can be achieved by other measures shim plates can be om
44、itted, e.g. by self-aligning clamps.Testing shall be carried out at room temperature, unless otherwise specified.The speed of testing is 10 mm/min or less.NOTE 2 If tests at higher speeds show that the higher testing speed has no influence on the test results, then the higher testing speed may be us
45、ed for the tensile shear tests.The displacement shall be measured as the travel of the crosshead or by using extension calliper gauges, laser measuring equipment or other suitable extension sensors with a defined length directly on the specimen. Measurements made using signals from the crosshead sha
46、ll, if necessary, be corrected by taking the stiffness of the machine into consideration. The sensing method used and the defined length of the specimen measured shall be recorded in the test report.4 ISO 2013 All rights reservedBS EN ISO 12996:2013ISO 12996:2013(E)Tests results are comparable only
47、when the tests are carried out under identical boundary conditions.a) test arrangement without shim platesb) test arrangement with shim plates (two layers)c) test arrangement with shim plates (three layers)Key1 shim platesFigure 3 Set-up for tensile shear test specimensFigure 4 illustrates a typical
48、 force elongation diagram for specimens with interference and clearance fit joints showing slippage. Different diagrams can be the result of different combinations of joining methods, sheet materials and thicknesses, as well as specimen geometries.6 Failure modes and force-displacement curvesThe fai
49、lure mode after tensile shear testing shall be classified according to Annex A.Figures A.1 to A.8 show classification of typical failure modes.Figure A.9 shows some forcedisplacement curves.7 Test reportThe test report shall contain the information agreed to between the contracting parties. The content may include some or all items listed below:a) a reference to this International Standard (ISO 12996:2013);b) name of the examiner and/or the examining body;c) date and signature of the examiner and/or the exam
