1、BRITISH STANDARD BS ISO 4587:2003 Adhesives Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies ICS 83.180 BS ISO 4587:2003 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 2 July 2003 BSI 2 July 2003 ISBN 0 580 421
2、75 9 National foreword This British Standard reproduces verbatim ISO 4587:2003 and implements it as the UK national standard. The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives, which has the responsibility to: A list of organizations represented on this c
3、ommittee can be obtained on request to its secretary. ISO 4587:2003 supersedes ISO 4587:1995, which was never adopted as a British Standard. Cross-references The British Standards which implement international publications referred to in this document may be found in the BSI Catalogue under the sect
4、ion entitled “International Standards Correspondence Index”, or by using the “Search” facility of the BSI Electronic Catalogue or of British Standards Online. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. C
5、ompliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; present to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor rel
6、ated international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the ISO title page, pages ii to iv, pages 1 to 4, an inside back cover and a back cover. The BSI copyright date displayed in this document indica
7、tes when the document was last issued. Amendments issued since publication Amd. No. Date Comments Reference number ISO 4587:2003(E) OSI 3002INTERNATIONAL STANDARD ISO 4587 Third edition 2003-03-15 Adhesives Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies Adhsifs Dterm
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13、 3002 Allr ihgtsser edevrBSISO4587:2003IS:7854 O3002(E) I SO 3002 All irhgts seredevr iiiContents Page Foreword iv 1 Scope 1 2 Normative references . 1 3 Principle . 1 4 Apparatus. 1 5 Specimens . 2 6 Conditioning 2 7 Procedure. 2 8 Expression of results 4 9 Precision 4 10 Test report 4 BSISO4587:20
14、03IS:7854 O3002(E) iv I SO 3002 All irhgts seredevrForeword ISO (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. Eac
15、h member body interested in a subject for 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 Internation
16、al Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are 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 Standard
17、s adopted by the technical committees are circulated to the member bodies for voting. Publication as an International 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 o
18、f patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 4587 was prepared 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 rev
19、ised. BSISO4587:2003INTENRATIONAL TSANDADR IS:7854 O3002(E)I SO 3002 All irhgts seredevr 1Adhesives Determination of tensile 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
20、bonded assemblies using a standard specimen under specified conditions of preparation and testing. This test procedure does not provide design information. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the
21、 edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. 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
22、:1992, Adhesives Designation of main failure patterns EN 13887: 1) , Structural adhesives Guidelines for surface preparation 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 shea
23、r by the application of a tensile force parallel to the bond area and to the major axis of the specimen. NOTE 1 Single-lap specimens are economical, practical and easy to make. They are the most widely used specimens for development, evaluation and comparative studies involving adhesives and bonded
24、products, including manufacturing quality control. NOTE 2 The strength values obtained from the single-lap specimen should not 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
25、 80 % of the full-scale capacity. The response time of the machine shall be short enough so as to enable the force applied at 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 t
26、he constant speeds of testing specified in Clause 7 (see ISO 527-1). A machine which allows a constant rate of load application may be 1) To be published. BSISO4587:2003IS:7854 O3002(E) 2 I SO 3002 All irhgts seredevrused. In this case, the machine shall be capable of maintaining a rate of loading o
27、f 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 and 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 spec
28、imen will coincide with the direction of the applied force through the centreline of the grip assembly. NOTE Grips that operate by bolting 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, dim
29、ensions 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 specimens 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 diff
30、iculties in the interpretation of results because they will not permit direct comparison of the strengths of adhesive bonds. NOTE 2 The use 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 F
31、igure 1). In choosing the type of preparation, account shall also be taken of whether the test joint will be damaged by mechanical working, including overheating. Special care shall be taken in preparing individual specimens to ensure proper alignment and that bond thicknesses are as uniform and con
32、stant as possible. A typical thickness is 0,2 mm. Thicknesses can be controlled by inserting a calibrated wire spacer or small glass spheres 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
33、 the joint. 5.3 The adherend surface shall be properly treated to obtain an optimum bond. Surface treatments shall be in accordance with manufacturers instructions or the appropriate standard (EN 13887). The adhesive shall be applied and cured in accordance with the recommendations of the adhesive m
34、anufacturer or the applicable material standard. The excess of adhesive squeezed out during the formation of the joint shall be removed immediately 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
35、 required, but reliance should not be placed on fewer than five observations. 5.5 Measure the specimen dimensions to within 0,1 mm. 6 Conditioning The specimens shall be conditioned and tested in one of the standard conditioning atmospheres specified in ISO 291. 7 Procedure Locate the specimen symme
36、trically 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 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.
37、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. BSISO4587:2003IS:7854 O3002(E) I SO 3002 All irhgts seredevr 3Record the highest force during rupture as the breaking force for that specimen. Record the type of failure in ac
38、cordance 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 Figure 1 Shape and dimensions of test panel and specimen BSISO4587:2003IS:7854 O3002(E) 4 I SO 3002 All irhgts seredevr8 Expression of results Expre
39、ss 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 shear strength, in megapascals, is calculated by dividing the breaking force, in newtons, by the shear area, in square millimetres. 9 Precisio
40、n 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 shall include the following information: a) a reference to this International Standard; b) all details necessary for complete identification of
41、the adhesive tested, including type, source, manufacturers code number, batch or lot number, form, etc.; c) all details necessary for complete identification of the adherends, including the nature of the material and the surface preparation; d) a description of the bonding process, including the met
42、hod of application of the adhesive, drying and precuring conditions (where applicable), curing or setting time, and temperature and pressure for curing or setting; e) the average thickness (as precisely as practical) of the adhesive layer after formation of the bond, as well as the method used for c
43、ontrolling the bond thickness; f) a complete description of the specimens, including their dimensions and construction, the nominal overlap of the joint, whether the adherends were prepared individually or from panels, if the adherends were prepared from panels the number of panels used, the procedu
44、re 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 atmosphere; h) the speed of testing (or the rate of loading in the case of constant rate of load application); i) the breaking force or breakin
45、g 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. BSISO4587:2003blank BSISO4587:2003BS ISO 4587:2003 BSI 3
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