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1、INTERNATIONAL STANDARD ISO 11003-1 Second edition 2001-12-01 Reference number ISO 11003-1:2001(E) ISO 2001 Adhesives Determination of shear behaviour of structural adhesives Part 1: Torsion test method using butt-bonded hollow cylinders Adhsifs Dtermination du comportement en cisaillement dadhsifs s
2、tructuraux Partie 1: Mthode dessai en torsion de cylindres creux colls bout bout ISO 11003-1:2001(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 unl
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5、n the unlikely event that 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, in
6、cluding photocopying and microfilm, 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 Printe
7、d in Switzerland ISO 11003-1:2001(E) ISO 2001 All rights reserved iii Contents Page 1Scope . 1 2Normative references . 1 3Principle 1 4Apparatus . 1 5Test specimen . 3 6Test conditions 6 7Procedure . 6 8Calculations 7 9Precision . 7 10Test report 8 ISO 11003-1:2001(E) iv ISO 2001 All rights reserved
8、 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 for which a
9、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 all matter
10、s 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 Standard
11、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. International Standa
12、rd ISO 11003-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 11, Products. This second edition cancels and replaces the first edition (ISO 11003-1:1993), which has been technically revised. ISO 11003 consists of the following parts, under the general title Adhesives Determ
13、ination of shear behaviour of structural adhesives: Part 1: Torsion test method using butt-bonded hollow cylinders Part 2: Tensile test method using thick adherends INTERNATIONAL STANDARDISO 11003-1:2001(E) ISO 2001 All rights reserved 1 Adhesives Determination of shear behaviour of structural adhes
14、ives Part 1: Torsion test method using butt-bonded hollow cylinders 1Scope This part of ISO 11003 specifies a shear test for the characterization of adhesives in a bond. The shear stress/strain properties of the adhesive (including the shear modulus) are useful for advanced design work, e.g. in fini
15、te element analysis methods. 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. How
16、ever, parties to agreements 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
17、maintain registers of currently valid International Standards. ISO 291:1997, Plastics Standard atmospheres for conditioning and testing ISO 4588:1995, Adhesives Guidelines for the surface preparation of metals ISO 10365:1992, Adhesives Designation of main failure patterns 3Principle The shear deform
18、ation of the adhesive in an annular bond between two hollow cylinders, and the corresponding torque, are measured and recorded up to failure of the joint. 4Apparatus 4.1Torsion-testing machine, with a capacity of at least and preferably of . Alternatively, a suitably adapted tensile-testing machine
19、may be used. The machine shall include equipment for recording the torque instantaneously with an error of less than . The gripping heads shall be accurately aligned and, if no hydraulic gripping mechanism is available, all bolts and holes shall be precisely machined so that the specimens are mounte
20、d in the apparatus and tested free of uncontrolled loads. The machine shall be equipped with an adequately thermostatted chamber if tests are to be carried out at temperatures different from the ambient temperature. 4.2Displacement sensor (see Figure 1), capable of measuring, as near as possible to
21、the bond line, the displacement of the two adherends relative to each other and hence the deformation of the adhesive. The sensor and its associated target shall be rigidly mounted on the two adherends as shown in Figure 1. The range of the displacement-measuring equipment shall be adjustable to per
22、mit the full-scale reading to be varied between and . The equipment shall be capable of measuring displacements to an accuracy of . The sensor shall be of lightweight and robust construction since it is subjected to high accelerations on failure of the specimen. 300 Nm1 000 Nm 1 % 2m 1 000m1m ISO 11
23、003-1:2001(E) 2 ISO 2001 All rights reserved Key 1Adherends 2Target support (on upper adherend) 3Butt joint 4Transducer support (on lower adherend) 5Displacement transducer 6Target Figure 1 Adhesive-layer specimen with displacement transducer mounted in the test apparatus ISO 11003-1:2001(E) ISO 200
24、1 All rights reserved 3 5Test specimen 5.1Preparation 5.1.1Substrate material Aluminium alloy or steel are suitable materials for the adherends. Other materials are acceptable provided the material (including pre-treated surface layers) has a shear modulus at least ten times higher than that of the
25、adhesive. 5.1.2Preparation of the surface The surfaces to be bonded shall be prepared in accordance with ISO 4588 or by any method leading to a cohesive failure within the adhesive layer. 5.1.3Bonding Prepare the specimens in accordance with the instructions of the manufacturer of the adhesive. Info
26、rmation about conditioning of the specimen shall be included in the test report. A joint completely filled with adhesive is essential for the reliability of the test. The two adherends shall be bonded coaxially, with a maximum lateral displacement between their two axes of ( = outer radius), and a m
27、aximum angular deviation so that the bond line thickness varies by no more than of the recommended thickness. The joining device shall prevent the adhesive from running out of the joint and any displacement of the two adherends during curing. NOTETo achieve this, the two hollow cylinders may be alig
28、ned with the help of a plug made of polytetrafluoroethylene (PTFE) or any other suitable device. A temperature-resistant O-ring, inserted into the PTFE plug and placed just below the bond, stops the adhesive from running out of the joint. At the other ends of the adherends, two plates fastened to a
29、threaded rod passing through the PTFE plug prevent any displacement during curing (see Figure 2). 5.1.4Adhesive bond The preferred thickness of the bond is . NOTEFor special adhesives, a thickness in the range from to may be used. The thickness of the bond is defined by a rim which is machined along
30、 the outer perimeter of one adherend. The rim acts as spacer between the two adherends. The adhesive is applied to the machined adherend to fill the space adjacent to the rim, prior to joining the two adherends. The rim is removed on the lathe after the adhesive is cured (see Figure 3). The resultin
31、g adhesive layer shall have a width at least ten times its thickness. 5.1.5Dimensions Three sizes of specimen (A, B, C) are recommended (see Table 1), although intermediate sizes are acceptable provided that where is the inner radius of each cylinder; is the outer radius of each cylinder. 0,002roro
32、5 % 0,2 mm 0,05 mm0,5 mm ri?0,8ro ri ro ISO 11003-1:2001(E) 4 ISO 2001 All rights reserved Key 1Top plate 2Polytetrafluoroethylene plug 3Adhesive layer 4O-ring 5Rod with screw thread 6Bottom plate Figure 2 Coaxially aligned hollow cylinders in a suitable joining device ISO 11003-1:2001(E) ISO 2001 A
33、ll rights reserved 5 Dimensions in millimetres Key 1Adherends 2Adhesive 3Bolt 4Fixture NOTEThe rim spacer that controls the thickness of the bond is shown in the upper detail view. Before testing, the spacer is removed, as shown in the lower detail view. Figure 3 Dimensions of the specimen and speci
34、men holders ISO 11003-1:2001(E) 6 ISO 2001 All rights reserved The width () of the bond zone may be reduced to a minimum of if the available torque is not sufficient to produce failure of the specimen. Suitable values for the length of the specimen and the dimensions of the specimen holders are give
35、n in Figure 3. The thickness of the bond is controlled by a spacer (see 5.1.4 and Figure 3). 5.2Number of specimens At least five specimens shall be tested for a given adhesive. 6Test conditions 6.1Temperature The temperature of the test shall be one of the standard temperatures specified in ISO 291
36、. The temperature of the specimen shall be measured at the outer surface of the hollow cylinder, close to the bond (e.g. with thermocouples). Agreement to within is required. 6.2Shear rate The rate of shear of the adhesive shall lie within the range from to . NOTEThe preferred rate of shear is . The
37、 corresponding rate of angular displacement to be set on the torsion-testing machine is given by the equation: where is the thickness of the adhesive bond, expressed in millimetres; is the outer radius of the specimen, expressed in millimetres (see Table 1). 7Procedure Fix the specimens in the test
38、apparatus, equipped with a temperature cabinet if required. Adjust the apparatus so that the joint is free from any load. While increasing the shear deformation continuously up to the requested maximum value, record the torque- displacement curve. If the specimen fails, check the surfaces of the bon
39、ded parts and reject any specimens with incompletely filled adhesive bonds (due e.g. to the presence of bubbles or voids). Sometimes the adhesive layer will Table 1 Recommended specimen sizes Specimen Radii mmmm A3630 B2420 C1210 ri ro0,1ro riro 1 C 0,000 5 s10,02 s1 0,01 s1 = d ro d ro ISO 11003-1:
40、2001(E) ISO 2001 All rights reserved 7 not fail after reaching the maximum shear deformation, especially when loading with a low shear rate. If this happens, repeat the test with an increasing torque rate until the specimen fails. As before, check the adhesive layer for defects of fabrication. Ensur
41、e that cohesive failure is achieved. 8Calculations 8.1The shear stress , expressed in megapascals, in the bond line close to the outer radius is given by the equation: where is the torque, expressed in newton millimetres, acting across the joint; is the outer radius, expressed in millimetres, of the
42、 cylinders; is the inner radius, expressed in millimetres, of the cylinders. 8.2The displacement measured during the test is composed of the displacement of the adhesive and the displacement due to the twist of the two adherends (see Figure 4). Therefore, the shear strain in a bond of thickness is g
43、iven by the equation: where , , and are measured in millimetres. is calculated from the shear modulus of the adherend material and the shear stress acting in the adherends (alternatively, the deformation of the adherends may be determined experimentally at the appropriate temperatures for an unbonde
44、d specimen made of the same material and having the same dimensions). 8.3The shear modulus of the adhesive is determined from the slope of the initial linear portion of the stress-strain curve. 8.4Calculate the arithmetic mean of the results and the standard deviation for the shear modulus, as well
45、as the highest shear stress (shear strength) and corresponding shear strain and, if applicable, the shear stress and strain at specimen failure. 9Precision The precision of this test method is not known, because interlaboratory data are not available. When interlaboratory data are obtained, a precis
46、ion statement will be added at the following revision. = 2 Mro r4 o r 4 i M ro ri dmda dt t tan = da t = dm dt t = dadmdtt dtGt dt Ga(= /) ISO 11003-1:2001(E) 8 ISO 2001 All rights reserved 10Test report The test report shall include the following items: a)a reference to this part of ISO 11003; b)al
47、l information necessary for complete identification of the adhesive tested; c)the material of which the adherends were made; d)the type of specimen used (A, B or C) (or give inner and outer diameters if different from the recommended sizes); e)detailed information on all methods of surface preparati
48、on used; f)a description of the bonding method, including the bonding temperature and pressure, the adhesive curing time and information on the conditioning of the specimens; g)the thickness of the adhesive layer; Figure 4 Schematic diagram of the displacement of the surfaces of the bonded cylinders
49、 ISO 11003-1:2001(E) ISO 2001 All rights reserved 9 h)the test temperature; i)the number of specimens tested and used for the calculation; j)the individual results for the shear modulus, the highest shear stress and corresponding shear strain, and additionally, if applicable, the shear stress and shear strain at failure; k)the ranges of torque and displacement used; l)the averaged results, including the standard deviation; m) the stress-strain curve ob