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1、INTERNATIONAL STANDARD ISO 11003-2 Second edition 2001-12-15 Reference number ISO 11003-2:2001(E) ISO 2001 Adhesives Determination of shear behaviour of structural adhesives Part 2: Tensile test method using thick adherends Adhsifs Dtermination du comportement en cisaillement dadhsifs structuraux Pa
2、rtie 2: Mthode dessai en traction sur prouvette paisse ISO 11003-2:2001(E) ii ISO 2001 All rights reserved PDF disclaimer This PDF file may contain embedded typefaces. In accordance with Adobes licensing policy, this file may be printed or viewed but shall not be edited unless the typefaces which ar
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5、a problem relating to it is found, please inform the Central Secretariat at the address given below. ISO 2001 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 m
6、icrofilm, without permission in writing from either ISO at the address below or ISOs member 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.ch Web www.iso.ch Printed in Switzerland ISO 11003
7、-2:2001(E) ISO 2001 All rights reserved iii Contents Page 1Scope . 1 2Normative references . 1 3Principle 2 4Apparatus . 3 5Specimen 3 6Test specimen . 5 7Procedure . 8 8Calculations 10 9Precision . 12 10Test report 12 Annex ASuitable extensometer design. 14 ISO 11003-2:2001(E) iv ISO 2001 All right
8、s reserved Foreword 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. Each member body interested in a subject fo
9、r 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
10、all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International
11、 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 part of ISO 11003 may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Internatio
12、nal Standard ISO 11003-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. This second edition cancels and replaces the first edition (ISO 11003-2:1993), which has been technically revised. ISO 11003 consists of the following parts, under the general title Adhesi
13、ves Determination of shear behaviour of structural adhesives: Part 1: Torsion test method using butt-bonded hollow cylinders Part 2: Tensile test method using thick adherends Annex A of this part of ISO 11003 is for information only. INTERNATIONAL STANDARDISO 11003-2:2001(E) ISO 2001 All rights rese
14、rved 1 Adhesives Determination of shear behaviour of structural adhesives Part 2: Tensile test method using thick adherends 1Scope This part of ISO 11003 specifies a test method for determining the shear behaviour of an adhesive in a single lap joint bonded assembly when subjected to a tensile force
15、. The test is performed on specimens consisting of thick, rigid adherends, with a short length of overlap, in order to obtain the most uniform distribution of shear stresses possible and to minimize other stress states which initiate failure. This test method may be used to determine: the shear-stre
16、ss against shear-strain curve to failure of the adhesive; the shear modulus of the adhesive; other adhesive properties that can be derived from the stress/strain curve such as secant shear modulus and maximum shear stress; the effect of temperature, environment, test speed, etc., on these properties
17、. 2Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this part of ISO 11003. For dated references, subsequent amendments to, or revisions of, any of these publications do not apply. However, parties to agreements
18、 based on this part of ISO 11003 are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members of ISO and IEC maintain registers of curre
19、ntly valid International Standards. ISO 291:1997, Plastics Standard atmospheres for conditioning and testing ISO 683-11:1987, Heat-treatable steels, alloy steels and free-cutting steels Part 11: Wrought case-hardening steels ISO 1052:1982, Steels for general engineering purposes ISO 4588:1995, Adhes
20、ives Guidelines for the surface preparation of metals ISO 4995:2001, Hot-rolled steel sheet of structural quality ISO 10365:1992, Adhesives Designation of main failure patterns ISO 11003-2:2001(E) 2 ISO 2001 All rights reserved 3Principle An adhesively bonded test specimen (see Figure 1) is subjecte
21、d to a tensile force so that the adhesive is stressed in shear. The relative displacement of the adherends is measured using a purpose-built transducer located in the central region of the specimen. Force and displacement are measured from the start of application of the load until fracture of the s
22、pecimen. The shear stresses and strains are then calculated from the bond dimensions. Dimensions in millimetres Key 1Adhesive bond Figure 1 Specimen dimensions and configuration: a) Bonded adherends; b) Machined adherends ISO 11003-2:2001(E) ISO 2001 All rights reserved 3 4Apparatus 4.1Tensile-testi
23、ng machine, capable of producing fracture in the specimen at a tensile force between and of the full-scale range of the force transducer. 4.2Device for introducing a force into the specimen, so that negligible torque develops when force is applied to the specimen. For this purpose, the simple univer
24、sal-joint design shown in Figure 2 is satisfactory. 4.3Force transducer, capable of measuring the force in the specimen with an accuracy of of the force at a shear strain of 0,01. 4.4One or two extensometers (see note 2), for measuring the shear displacement between points of known separation on eac
25、h adherend in the central region of the bond (see Figure 3 and annex A). The points of contact with the adherends shall be within a distance of from the bonded faces. The device(s) shall be capable of measuring the shear displacement to an accuracy of . NOTE 1During loading, each adherend will bend
26、slightly, leading to a small rotation of the central (bonded) region of the test specimen. In order to achieve high accuracy in displacement measurements, it is necessary for the extensometer(s) to rotate with the specimen. This has been achieved in the design shown in Figure 3 by double-pin contact
27、 with one of the adherends. NOTE 2The use of two extensometers on opposing faces of the specimen is recommended to minimize, by averaging the extensometer readings, any contribution to measurements from a twisting moment applied to the specimen. The use of two extensometers will also serve to indica
28、te any malfunctioning of one of the extensometers as revealed by significantly different readings from the two devices. 4.5Data-logging equipment, to continuously record the relative displacement of the adherends and the applied load, from the start of application of the load until the specimen brea
29、ks. 4.6Micrometer, having an accuracy of better than , to measure the dimensions of the adherends. 4.7Optical microscope, having an accuracy of better than , to measure the thickness of the adhesive bond when the specimen configuration shown in Figure 1 a) is used. 5Specimen 5.1Specimen dimensions a
30、nd configuration Specimens shall be prepared either by bonding metal plates or strips together to produce the configuration shown in Figure 1 a) or by bonding adherends that have been machined to the shape shown in Figure 1 b). The dimensions of the specimen are given in Figure 1 and are the same, w
31、ithin variations in the bond thickness, for both preparation methods. The bond thickness shall lie in the range to . NOTE 1The preferred bond thickness is . NOTE 2The adherends shown in Figure 1 a) have a lower bending stiffness than the continuous geometry shown in Figure 1 b). Consequently, the pe
32、el stresses at the ends of the adhesive in the specimen in Figure 1 a) will be higher than those in the specimen in Figure 1 b). This should have only a small influence on stress and strain measurement but, since failure is generally initiated by these peel stresses, the specimen design shown in Fig
33、ure 1 a) is likely to fail earlier (at lower stress and strain) than the design shown in Figure 1 b). 10 % 80 % 1 % 2 mm 1m 0,002 mm 0,002 mm 0,2 mm0,8 mm 0,5 mm ISO 11003-2:2001(E) 4 ISO 2001 All rights reserved 5.2Adherends For the purpose of the measurement of the properties of the adhesive, stee
34、l adherends are recommended because of their high modulus. NOTEA suitable steel is XC18 or E24, Grade 1 or 2. Machine the panels or bars to be used for the adherends in accordance with ISO 683-11, ISO 1052 and ISO 4995 to the dimensions given in Figures 1 a) or 1 b) depending on which specimen confi
35、guration is chosen. 5.3Preparation of surfaces before bonding The surfaces to be bonded shall be prepared in accordance with ISO 4588 or by any other method leading to cohesive failure within the adhesive layer. Figure 2 Example of device for loading the specimen in a tensile-testing machine ISO 110
36、03-2:2001(E) ISO 2001 All rights reserved 5 6Test specimen 6.1Preparation 6.1.1Specimens with flat-ended adherends 6.1.1.1General Specimens with flat-ended adherends shall have the configuration shown in Figure 1 a) and may be prepared from uncut panels, from pre-cut panels or as individual specimen
37、s from machined plates. Key 1Mobile inner part 2Rigid outer frame 3Steel leaf spring 4Transducer coil 5Transducer core 6Tungsten pins Figure 3 Example of extensometer positioning ISO 11003-2:2001(E) 6 ISO 2001 All rights reserved 6.1.1.2Uncut panels The panels from which the specimens are cut shall
38、consist of two sheets with dimensions in accordance with Figure 4, bonded together in accordance with the adhesive manufacturers instructions. In order to define the thickness of the adhesive, shims or spacers (metal foil) or calibrated metal wires may be incorporated outside the area which will bec
39、ome the overlap zone. Cut the bonded panels into specimens using a suitable tool such as a band saw. Then subject the specimens to the required machining. Perform the last pass on the edge of the specimen parallel to the longitudinal direction of the specimen so as to avoid any metal burrs along the
40、 bonded joint. Drill holes at the ends of each specimen for pins to hold the specimen to the tensile-testing machine. Delineate the overlap zone by milling two grooves as shown in Figure 5. When the specimens are machined, care shall be taken to ensure that the assembly is not heated above . No liqu
41、id shall be used for cooling. 6.1.1.3Pre-cut panels Proceed as in 6.1.1.2, using two pre-cut sheets so as to obtain a panel in accordance with Figure 6. Two holes shall be provided in each sheet so that the two sheets can be superposed correctly using an assembly with two centering lugs. Cut out and
42、 machine specimens as explained in 6.1.1.2. 6.1.1.4Individual specimens Bond two plates of dimensions in accordance with the adhesive manufacturers instructions, defining the thickness of the adhesive joint as indicated in 6.1.1.2. Ensure that the sides of the adherends are parallel to the nearest .
43、 Machine each specimen to the required size. Drill holes for applying the load. Make two grooves by milling to delineate the overlap. Take the same precautions as in 6.1.1.2. 6.1.2Specimens with stepped adherends The adherends for this specimen type shall be machined to the dimensions given in Figur
44、e 1 b) prior to bonding. The adherends shall be bonded whilst held securely in a frame that ensures accurate alignment of the adherends. In order to produce a bond of well-defined shape and length, strips of steel or PTFE of thickness shall be inserted in the gaps between the adherends after the app
45、lication of the adhesive and prior to curing. They shall be removed after the adhesive has cured. If steel strips are used, they shall be coated with a release agent. NOTEIt is recommended that such strips have a tapered edge so that a triangular fillet is formed at the end of the bond. This fillet
46、reduces the strain concentration at the end of the bond which can extend the life of the test specimen. 6.2Number of specimens At least five specimens shall be tested for a given adhesive. 50 C 110 mm25 mm6 mm 0,1 mm 1,5 mm 45 ISO 11003-2:2001(E) ISO 2001 All rights reserved 7 Dimensions in millimet
47、res Key 1Trim to waste 2Adherends 3Adhesive 4Shim (optional) a Depends on number of specimens b Direction of roll during metal manufacture Figure 4 Uncut panel for making specimen assemblies ISO 11003-2:2001(E) 8 ISO 2001 All rights reserved 7Procedure The temperature of the test shall be one of the
48、 standard temperatures specified in ISO 291. Measure the length of the overlap and the width of each specimen to the nearest . Where flat-ended specimens are used Figure 1 a), measure the thickness of the adhesive joint in the overlap zone at both ends and on each side of the specimen with an accura
49、cy of . Record the average value of the four measurements. If the difference between the end values is greater than of the average value, discard the specimen. Where specimens having stepped adherends Figure 1 b) are used, the bond thickness may be obtained from measurements, prior to bonding, of the thickness of the stepped ends of the adherends and of the thickness of the bonded specimen in the overlap region. Place an extensometer on one or both sides of the specimen (see Figure
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