BS-EN-15336-2007.pdf

BRITISH STANDARD BS EN 15336:2007 Adhesives Determination of the time to rupture of bonded joints under static load The European Standard EN 15336:2007 has the status of a British Standard ICS 83.180 ? Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI BS EN 15336:2007 This British Standard was published under the authority of the Standards Policy and Strategy Committee on 30 March 2007 © BSI 2007 ISBN 978 0 580 50421 1 National foreword This British Standard was published by BSI. It is the UK implementation of EN 15336:2007. The UK participation in its preparation was entrusted to Technical Committee PRI/52, Adhesives. A list of organizations represented on PRI/52 can be obtained on request to its secretary. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard cannot confer immunity from legal obligations. Amendments issued since publication Amd. No. DateComments Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM EN 15336 February 2007 ICS 83.180 English Version Adhesives - Determination of the time to rupture of bonded joints under static load ( ISO 15109:1998 modified) Adhésifs - Détermination du temps jusqu'à la rupture de joints collés soumis à une charge statique (ISO 15109:1998 modifiée) Klebstoffe - Bestimmung der Zeit bis zum Bruch geklebter Fügeverbindungen unter statischer Belastung (ISO 15109:1998 modifiziert) This European Standard was approved by CEN on 29 December 2006. CEN members are bound to comply with 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 Management 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 Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Management Centre: rue de Stassart, 36 B-1050 Brussels © 2007 CENAll rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 15336:2007: E Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15336:2007 (E) 2 Contents Page Foreword3 1 Scope 5 2 Normative references5 3 Principle5 4 Apparatus .5 5 Specimens5 5.1 Adherend material .5 5.2 Shape and dimensions5 5.3 Cleaning and surface treatment of adherends .6 5.4 Preparation of specimens.6 5.5 Conditioning and testing atmosphere.6 5.6 Number of specimens .6 6 Procedure .6 7 Expression of results 7 8 Precision.7 9 Test report7 Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15336:2007 (E) 3 Foreword This document (EN 15336:2007) has been prepared 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 August 2007, and conflicting national standards shall be withdrawn at the latest by August 2007. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15336:2007 (E) 4 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 health practices and to ensure compliance with any regulatory conditions. Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15336:2007 (E) 5 1 Scope This European Standard describes a procedure for the determination of the time to failure of a bonded joint, using a specimen which is statically loaded under specified conditions. This method can only be used for comparing adhesives, and the results cannot be used for design purposes. 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) applies. EN 1465, Adhesives Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies (ISO 4587:1979 modified) 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 291:2005) EN ISO 10365, Adhesives Designation of main failure patterns (ISO 10365:1992) 3 Principle The time to rupture of a bonded lap-shear specimen is measured under a specific load. 4 Apparatus 4.1 Test rig, capable of holding specimens securely at one end, in the vertical position, the other end of each specimen being linked to a fixture capable of receiving different weights in order to vary the load. The direction of the load shall coincide with the longitudinal axis of the specimen. The rig shall be capable of loading several specimens simultaneously. It shall be designed such that any vibration associated with breakage of one specimen will not influence the remaining specimens. The rig shall be placed in an environmentally controlled cabinet or be designed such that the specimens are tested under controlled conditions. 4.2 Timer, capable of measuring the time to failure of a specimen to an accuracy of ± 1 %. 5 Specimens 5.1 Adherend material The adherends shall be made of metal, rigid plastic or rigid fibre-reinforced plastic. 5.2 Shape and dimensions Specimens shall be as shown in Figure 1. The thickness of the adherends shall be sufficient to avoid significant plastic deformation. Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15336:2007 (E) 6 Dimensions in millimetres Key 1 Bonded zone 2 Gripped zone 3 Spacer plate Figure 1 Test specimen for all adherend materials 5.3 Cleaning and surface treatment of adherends The cleaning and surface treatment of adherends shall be in accordance with the instructions of the adherend manufacturer and/or adhesive manufacturer, and/or shall be chosen from the methods described in EN 13887. 5.4 Preparation of specimens Prepare specimens in accordance with the procedure described in EN 1465. Apply and cure the adhesive in accordance with the manufacturer's recommendations. Control the bond line thickness by appropriate means, such as glass spheres or wire spacers. When using glass spheres, the content shall not exceed 0,5 % of the mass of the adhesive. When using wire spacers, prepare the specimens in such a way that the final test piece does not include the area containing the wire. The bond line thickness shall be reported in the test report. 5.5 Conditioning and testing atmosphere Condition and test the specimens in one of the standard atmospheres specified in EN ISO 291. 5.6 Number of specimens Prepare and test at least three specimens for each stress investigated. 6 Procedure Attach the specimens to the test rig. Allow them to reach equilibrium in the controlled conditions selected for the test. Using weights, carefully apply the loads necessary to obtain the required stresses. Licensed Copy: London South Bank University, London South Bank University, Mon Apr 02 00:21:59 GMT+00:00 2007, Uncontrolled Copy, (c) BSI EN 15336:2007 (E) 7 NOTE It is usual to investigate stresses which are a percentage of the tensile lap-shear strength determined in accordance with EN 1465. Record the time to failure of each specimen. Determine the failure pattern for each specimen, in accordance with EN ISO 10365. 7 Expression of results Record graphically the stress investigated versus the average time to failure, plotting the stress as the ordinate and the time to failure as the abscissa on a logarithmic scale. 8 Precision The precision of this test method is not known because interlaboratory data are not available. When interlaboratory data are obtained, a precision statement will be added at the following revision. 9 Test report The test report shall include the following information: a) reference to this European Standard; b) all details necessary for identification of the adhesive tested, including type, source and manufacturer's code number; c) all details necessary for complete identification of the adherends used, including their dimensions and the method of preparing the surfaces prior to bonding; d) bond line thickness; e) atmosphere used for conditioning and testing; f) number of specimens tested; g) graph of stress versus time to failure; h) failure pattern for each specimen; i) date of the test. 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