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1、 Reference number ISO 4587:2003(E) ISO 2003 INTERNATIONAL STANDARD ISO 4587 Third edition 2003-03-15 Adhesives Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies Adhsifs Dtermination de la rsistance au cisaillement dassemblages colls rigide sur rigide recouvrement simple
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5、iven below. ISO 2003 All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any means, electronic or mechanical, including photocopying and microfilm, without permission in writing from either ISO at the address below or ISOs memb
6、er body in the country of the requester. ISO copyright office Case postale 56 CH-1211 Geneva 20 Tel. + 41 22 749 01 11 Fax + 41 22 749 09 47 E-mail copyrightiso.org Web www.iso.org Published in Switzerland ii ISO 2003 All rights reserved -,-,- ISO 4587:2003(E) ISO 2003 All rights reserved iii Conten
7、ts Page Forewordiv 1 Scope1 2 Normative references .1 3 Principle.1 4 Apparatus.1 5 Specimens .2 6 Conditioning2 7 Procedure.2 8 Expression of results4 9 Precision4 10 Test report4 -,-,- ISO 4587:2003(E) iv ISO 2003 All rights reserved Foreword ISO (the International Organization for Standardization
8、) 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 which a technical committee has been established has the right to be repr
9、esented 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 all matters of electrotechnical standardization. International Standards ar
10、e drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an Internation
11、al Standard requires approval by at least 75 % of the member bodies casting a vote. 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 such patent rights. ISO 4587 was prep
12、ared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. This third edition cancels and replaces the second edition (ISO 4587:1995), which has been technically revised. -,-,- INTERNATIONAL STANDARD ISO 4587:2003(E) ISO 2003 All rights reserved 1 Adhesives Determination of tensi
13、le lap-shear strength of rigid-to-rigid bonded assemblies 1 Scope This International Standard specifies a method for determining the tensile lap-shear strength of rigid-to-rigid bonded assemblies using a standard specimen under specified conditions of preparation and testing. This test procedure doe
14、s not provide design information. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) a
15、pplies. ISO 291:1997, Plastics Standard atmospheres for conditioning and testing ISO 527-1:1993, Plastics Determination of tensile properties Part 1: General principles ISO 10365:1992, Adhesives Designation of main failure patterns EN 13887:1), Structural adhesives Guidelines for surface preparation
16、 of metals and plastics prior to adhesive bonding 3 Principle Adhesive lap-shear bond strength is determined by stressing a single-overlap joint between rigid adherends in shear by the application of a tensile force parallel to the bond area and to the major axis of the specimen. NOTE 1 Single-lap s
17、pecimens are economical, practical and easy to make. They are the most widely used specimens for development, evaluation and comparative studies involving adhesives and bonded products, including manufacturing quality control. NOTE 2 The strength values obtained from the single-lap specimen should n
18、ot be used as allowable design-stress values for structural joints. 4 Apparatus 4.1 Tensile-testing machine, selected so that the rupture of the specimen falls between 10 % and 80 % of the full-scale capacity. The response time of the machine shall be short enough so as to enable the force applied a
19、t the time of rupture to be measured accurately. The recorded force shall not differ from the true applied force by more than 1 %. The machine shall be capable of maintaining the constant speeds of testing specified in Clause 7 (see ISO 527-1). A machine which allows a constant rate of load applicat
20、ion may be 1) To be published. ISO 4587:2003(E) 2 ISO 2003 All rights reserved used. In this case, the machine shall be capable of maintaining a rate of loading of 8,3 MPa/min to 9,7 MPa/min. The machine shall be provided with a suitable pair of self-aligning grips to hold the specimen. The grips an
21、d attachments (see Note) shall be constructed so that they move into alignment with the specimen as soon as the load is applied, so that the long axis of the specimen will coincide with the direction of the applied force through the centreline of the grip assembly. NOTE Grips that operate by bolting
22、 through the adherends should be avoided since such grips give rise to undesirable stress concentrations. 5 Specimens 5.1 Specimens shall conform to the form, dimensions and alignment of the adherends as shown in Figure 1. The length of overlap shall be 12,5 mm 0,25 mm. The major axis of the specime
23、ns shall correspond to the rolling direction in the case of metal adherends. NOTE 1 The choice of dimensions other than those shown in Figure 1 may result in difficulties in the interpretation of results because they will not permit direct comparison of the strengths of adhesive bonds. NOTE 2 The us
24、e of a jig for accurately locating adherends during bonding is strongly recommended. 5.2 The test joints may be prepared either individually or from panels (see Figure 1). In choosing the type of preparation, account shall also be taken of whether the test joint will be damaged by mechanical working
25、, including overheating. Special care shall be taken in preparing individual specimens to ensure proper alignment and that bond thicknesses are as uniform and constant as possible. A typical thickness is 0,2 mm. Thicknesses can be controlled by inserting a calibrated wire spacer or small glass spher
26、es in the bond area. If a wire spacer is used, the wire shall lie parallel to the direction of application of the load as this minimizes the effect of the wire on the joint. 5.3 The adherend surface shall be properly treated to obtain an optimum bond. Surface treatments shall be in accordance with m
27、anufacturers instructions or the appropriate standard (EN 13887). The adhesive shall be applied and cured in accordance with the recommendations of the adhesive manufacturer or the applicable material standard. The excess of adhesive squeezed out during the formation of the joint shall be removed im
28、mediately after assembling. For all adherends, the method used for surface preparation shall be reported. 5.4 The number of specimens will depend on the precision required, but reliance should not be placed on fewer than five observations. 5.5 Measure the specimen dimensions to within 0,1 mm. 6 Cond
29、itioning The specimens shall be conditioned and tested in one of the standard conditioning atmospheres specified in ISO 291. 7 Procedure Locate the specimen symmetrically in the grips, with each grip 50 mm 1 mm from the nearest edge of the overlap. A shim may be used in the grips so that the applied
30、 force will be in the plane of the adhesive bond. Operate the machine at a constant test speed so that the average joint will be broken in a period of 65 s 20 s. If a machine working at a constant rate of loading is used, apply the shear load at a rate of 8,3 MPa to 9,8 MPa per minute. ISO 4587:2003
31、(E) ISO 2003 All rights reserved 3 Record the highest force during rupture as the breaking force for that specimen. Record the type of failure in accordance with ISO 10365. Dimensions in millimetres Standard test panel Key 1 discard 2 typically 90 1 3 adhesive bond 4 area held in grips 5 shear area
32、Figure 1 Shape and dimensions of test panel and specimen -,-,- ISO 4587:2003(E) 4 ISO 2003 All rights reserved 8 Expression of results Express the results of the tests as the arithmetic mean of the breaking force, in newtons, or the breaking stress, in megapascals, of the valid specimens. The lap sh
33、ear strength, in megapascals, is calculated by dividing the breaking force, in newtons, by the shear area, in square millimetres. 9 Precision This test is widely used and accepted. However, the precision is not known because interlaboratory data are not available. 10 Test report The test report shal
34、l include the following information: a) a reference to this International Standard; b) all details necessary for complete identification of the adhesive tested, including type, source, manufacturers code number, batch or lot number, form, etc.; c) all details necessary for complete identification of
35、 the adherends, including the nature of the material and the surface preparation; d) a description of the bonding process, including the method of application of the adhesive, drying and precuring conditions (where applicable), curing or setting time, and temperature and pressure for curing or setti
36、ng; e) the average thickness (as precisely as practical) of the adhesive layer after formation of the bond, as well as the method used for controlling the bond thickness; f) a complete description of the specimens, including their dimensions and construction, the nominal overlap of the joint, whethe
37、r the adherends were prepared individually or from panels, if the adherends were prepared from panels the number of panels used, the procedure and conditions used to cut out the adherends and the number of individual specimens tested; g) the conditioning parameters prior to testing, and the test atm
38、osphere; h) the speed of testing (or the rate of loading in the case of constant rate of load application); i) the breaking force or breaking stress for each specimen, the arithmetic mean and the standard deviation; j) the type of failure in accordance with ISO 10365; k) details of any deviations from the procedure specified and of any incidents that may have affected the results. -,-,- -,-,- ISO 4587:2003(E) ICS 83.180 Price based on 4 pages ISO 2003 All rights reserved -,-,-