1、July 2011 Translation by DIN-Sprachendienst.English price group 10No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 8
2、3.180!$sR“1805847www.din.deDDIN EN 14869-1Structural adhesives Determination of shear behaviour of structural bonds Part 1: Torsion test method using butt-bonded hollow cylinders(ISO 11003-1:2001, modified)English translation of DIN EN 14869-1:2011-07Strukturklebstoffe Bestimmung des Scherverhaltens
3、 struktureller Klebungen Teil 1: Torsionsprfverfahren unter Verwendung stumpf verklebter Hohlzylinder(ISO 11003-1:2001, modifiziert)Englische bersetzung von DIN EN 14869-1:2011-07Adhsifs structuraux Dtermination du comportement en cisaillement de collages structuraux Partie 1: Mthode dessai en torsi
4、on de cylindres creux colls bout bout(ISO 11003-1:2001, modifi)Traduction anglaise de DIN EN 14869-1:2011-07SupersedesDIN EN 14869-1:2004-10www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.1507.11 DIN EN 14869-1:2011-07 A comma is u
5、sed as the decimal marker. National foreword This standard has been prepared by Technical Committee CEN/TC 193 “Adhesives” (Secretariat: AENOR, Spain). The responsible German body involved in its preparation was the Normenausschuss Materialprfung (Materials Testing Standards Committee), Working Comm
6、ittee NA 062-04-55 AA Prfung von Konstruktions-klebstoffen, -klebverbindungen und Kernverbunden. Deviations from ISO 11003-1:2001 are marked by a vertical line in the left margin. Amendments This standard differs from DIN EN 14869-1:2004-10 as follows: a) an environmental statement has been included
7、; b) normative references have been updated; c) the standard has been editorially revised. Previous editions DIN EN 14869-1: 2004-10 2 EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 14869-1 May 2011 ICS 83.180 Supersedes EN 14869-1:2004English Version Structural adhesives - Determination of sh
8、ear behaviour of structural bonds - Part 1: Torsion test method using butt-bonded hollow cylinders (ISO 11003-1:2001, modified) Adhsifs structuraux - Dtermination du comportement en cisaillement de collages structuraux - Partie 1 : Mthode dessai en torsion de cylindres creux colls bout bout (ISO 110
9、03-1:2001, modifi) Strukturklebstoffe - Bestimmung des Scherverhaltens struktureller Klebungen - Teil 1: Torsionsprfverfahren unter Verwendung stumpf verklebter Hohlzylinder (ISO 11003-1:2001, modifiziert) This European Standard was approved by CEN on 10 March 2011. CEN members are bound to comply w
10、ith the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard 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 Man
11、agement Centre or to any CEN member. This European Standard exists in three official versions (English, 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 s
12、tatus as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portu
13、gal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATION EUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means
14、reserved worldwide for CEN national Members. Ref. No. EN 14869-1:2011: EEN 14869-1:2011 (E) 2 Contents Page Foreword 31 Scope 42 Normative references 43 Terms and definitions .44 Principle 45 Apparatus .46 Test specimen 66.1 Preparation .66.1.1 Substrate material66.1.2 Preparation of the surface 66.
15、1.3 Bonding 66.1.4 Adhesive bond .86.1.5 Dimensions 106.2 Number of specimens 107 Test conditions . 107.1 Temperature 107.2 Shear rate 108 Procedure 119 Calculations . 1110 Precision 1311 Test report . 13DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 3 Foreword This document (EN 14869-1:2011) has been p
16、repared by Technical Committee CEN/TC 193 “Adhesives”, the secretariat of which is held by AENOR. 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 November 2011, and conflicting national standards
17、shall be withdrawn at the latest by November 2011. Attention is drawn to the possibility 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. This document supersedes EN 14869-1
18、:2004. SAFETY STATEMENT Persons using this document should be familiar with the normal laboratory practice, if applicable. This document does not purport to address all of the safety problems, if any, associated with its use. It is the responsibility of the user to establish appropriate safety and h
19、ealth practices and to ensure compliance with any regulatory conditions. ENVIRONMENTAL STATEMENT It is understood that some of the material permitted in this standard may have negative environmental impact. As technological advantages lead to acceptable alternatives for these materials, they will be
20、 eliminated from this standard to the extent possible. At the end of the test, the user of the standard should take care to carry out an appropriate disposal of the wastes, according to local regulation. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the f
21、ollowing countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, S
22、lovakia, Slovenia, Spain, Sweden, Switzerland and the United Kingdom. DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 4 1 Scope This European Standard specifies a shear test for the characterization of adhesives in a bond. The shear stress/strain properties of the adhesive (including the shear modulus) a
23、re useful for advanced design work, e.g. in finite element analysis methods. 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 refer
24、enced document (including any amendments) applies. EN 923:2005+A1:2008, Adhesives Terms and definitions EN 13887, Structural Adhesives Guidelines for surface preparation of metals and plastics prior to adhesive bonding EN ISO 291, Plastics Standard atmospheres for conditioning and testing (ISO 291:2
25、008) EN ISO 10365, Adhesives Designation of main failure patterns (ISO 10365:1992) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 923:2005+A1:2008 apply. 4 Principle The shear deformation of the adhesive in an annular bond between two hollow cylinder
26、s, and the corresponding torque, are measured and recorded up to failure of the joint. 5 Apparatus 5.1 Torsion-testing machine, with a capacity of at least 300 Nm and preferably of 1 000 Nm. Alternatively, a suitably adapted tensile-testing machine may be used. The machine shall include equipment fo
27、r recording the torque instantaneously with an error of less than 1 %. 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 mounted in the apparatus and tested free of uncontroll
28、ed 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. 5.2 Displacement sensor (see Figure 1), capable of measuring, as near as possible to the bond line, the displacement of the two adhe
29、rends 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 permit the full-scale reading to be varied between
30、 2 m and 1 000 m. The equipment shall be capable of measuring displacements to an accuracy of 1 m. The sensor shall be of lightweight and robust construction since it is subjected to high accelerations on failure of the specimen. DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 5 Key 1 Adherends 2 Target
31、support (on upper adherend) 3 Butt joint 4 Sensor support (on lower adherend) 5 Displacement sensor 6 Target Figure 1 Adhesive-layer specimen with displacement sensor mounted in the test apparatus DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 6 6 Test specimen 6.1 Preparation 6.1.1 Substrate material A
32、luminium 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 adhesive. 6.1.2 Preparation of the surface The surfaces to be bonded shall be p
33、repared in accordance with EN 13887 or by any method leading to a cohesive failure within the adhesive layer. 6.1.3 Bonding Prepare the specimens in accordance with the instructions of the manufacturer of the adhesive. Information about conditioning of the specimen shall be included in the test repo
34、rt. 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 0,002 ro(= outer radius), and a maximum angular deviation so that the bond line thickness varies by no
35、more than 5 % 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. NOTE To achieve this, the two hollow cylinders may be aligned with the help of a plug made of polytetrafluoroethylene (PTFE
36、) 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 threaded rod passing through the PTFE plug prevent any displaceme
37、nt during curing (see Figure 2). DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 7 Key 1 Top plate 2 Polytetrafluoroethylene plug 3 Adhesive layer 4 O-ring 5 Rod with screw thread 6 Bottom plate Figure 2 Coaxially aligned hollow cylinders in a suitable joining device DIN EN 14869-1:2011-07 EN 14869-1:201
38、1 (E) 8 6.1.4 Adhesive bond The preferred thickness of the bond is 0,2 mm. NOTE For special adhesives, a thickness in the range from 0,05 mm to 0,5 mm can be used. The thickness of the bond may be defined by the use of a bondline thickness material included in the adhesive, such as glass beads, a ne
39、t or cloth consistent with the adhesive manufacturers recommendations. The adhesive shall be prevented from running out of the joint using a non-adherent flexible band around the outside of the two adherends. Alternatively, the thickness of the bond can be defined by a rim which is machined along th
40、e 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 resulting a
41、dhesive layer shall have a width at least ten times its thickness. DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 9 Dimensions in millimetres Key 1 Adherends 2 Adhesive 3 Bolt 4 Fixture NOTE The rim spacer that controls the thickness of the bond is shown in the upper detail view. Before testing, the spa
42、cer is removed, as shown in the lower details view. Figure 3 Dimensions of the specimen and specimen holders DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 10 6.1.5 Dimensions Three sizes of specimen (A, B, C) are recommended (see Table 1), although intermediate sizes are acceptable provided that: oirr
43、8,0 (1) where riis the inner radius of each cylinder; ro is the outer radius of each cylinder. The width of the bond (ro- ri) zone may be reduced to a minimum of 0,1 roif the available torque is not sufficient to produce failure of the specimen. Suitable values for the length of the specimen and the
44、 dimensions of the specimen holders are given in Figure 3. Table 1 Recommend specimen sizes Specimen Radiiro mm ri mm A B C 36 24 12 30 20 10 6.2 Number of specimens At least five specimens shall be tested for a given adhesive. 7 Test conditions 7.1 Temperature The temperature of the test shall be o
45、ne of the standard temperatures specified in EN ISO 291. 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 1 C is required. 7.2 Shear rate The rate of shear of the adhesive shall lie within
46、the range from 0,000 5 s-1 to 0,02 s-1. NOTE The preferred rate of shear is 0,01 s-1. DIN EN 14869-1:2011-07 EN 14869-1:2011 (E) 11 The corresponding rate of angular displacement () to be set on the torsion-testing machine is given by the equation: ord= (2) where d is the thickness of the adhesive b
47、ond, expressed in millimetres; ro is the outer radius of the specimen, expressed in millimetres (see Table 1). 8 Procedure Fix the specimens in the test apparatus, equipped with a temperature cabinet if required. Adjust the apparatus so that the joint is free from any load. While increasing the shea
48、r deformation continuously up to the requested maximum value, record the torque displacement curve. If the specimen fails, check the surfaces of the bonded parts and reject any specimens with incompletely filled adhesive bonds (due e.g. to the presence of bubbles or voids). Sometimes the adhesive la
49、yer will 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. Ensure that cohesive failure is achieved. 9 Calculations 9.1 The shear stress, , expressed in megapascals, in the bond line close to the outer radius is given by the equation: 442ioorrrM= (3) where M is th
