1、BRITISH STANDARD BS EN 14258:2004 Structural adhesives Mechanical behaviour of bonded joints subjected to short and long terms exposure at specified conditions of temperature The European Standard EN 14258:2004 has the status of a British Standard ICS 83.180 BS EN 14258:2004 This British Standard wa
2、s published under the authority of the Standards Policy and Strategy Committee on 30 November 2004 BSI 30 November 2004 ISBN 0 580 44920 3 National foreword This British Standard is the official English language version of EN 14258:2004. The UK participation in its preparation was entrusted to Techn
3、ical Committee PRI/52, Adhesives, which has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references The British Standards which implement international or European publications referred to in this document may be foun
4、d in the BSI Catalogue under the section 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 respo
5、nsible for its correct application. Compliance 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 t
6、he UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an inside front cover, the EN title page, pages 2 to 6, an inside back cover and a back cover. The BSI copyright notice displayed i
7、n this document indicates when the document was last issued. Amendments issued since publication Amd. No. Date CommentsEUROPEANSTANDARD NORMEEUROPENNE EUROPISCHENORM EN14258 November2004 ICS83.180 Englishversion StructuraladhesivesMechanicalbehaviourofbondedjoints subjectedtoshortandlongtermsexposur
8、eatspecified conditionsoftemperature AdhsifsstructurauxComportementmcaniquedes assemblagescollssoumisuneexpositioncourtetlong termesdesconditionsdetempraturespcifies StrukturklebstoffeMechanischesVerhaltenvon Klebverbindungenbeikurzzeitigeroderlangzeitiger BeanspruchungbeifestgelegterTemperatur This
9、EuropeanStandardwasapprovedbyCENon2September2004. CENmembersareboundtocomplywiththeCEN/CENELECInternalRegulationswhichstipulatetheconditionsforgivingthisEurope an Standardthestatusofanationalstandardwithoutanyalteration.Uptodatelistsandbibliographicalreferencesconcernings uchnational standardsmaybeo
10、btainedonapplicationtotheCentralSecretariatortoanyCENmember. ThisEuropeanStandardexistsinthreeofficialversions(English,French,German).Aversioninanyotherlanguagemadebytra nslation undertheresponsibilityofaCENmemberintoitsownlanguageandnotifiedtotheCentralSecretariathasthesamestatusast heofficial vers
11、ions. CENmembersarethenationalstandardsbodiesofAustria,Belgium,Cyprus,CzechRepublic,Denmark,Estonia,Finland,France, Germany,Greece,Hungary,Iceland,Ireland,Italy,Latvia,Lithuania,Luxembourg,Malta,Netherlands,Norway,Poland,Portugal, Slovakia, Slovenia,Spain,Sweden,SwitzerlandandUnitedKingdom. EUROPEAN
12、COMMITTEEFORSTANDARDIZATION COMITEUROPENDENORMALISATION EUROPISCHESKOMITEEFRNORMUNG ManagementCentre:ruedeStassart,36B1050Brussels 2004CEN Allrightsofexploitationinanyformandbyanymeansreserved worldwideforCENnationalMembers. Ref.No.EN14258:2004:EEN 14258:2004 (E) 2 Contents Page Foreword3 Introducti
13、on .4 1 Scope 5 2 Normative references 5 3 Terms and definitions .5 4 Safety 5 5 Apparatus .5 6 Specimens 6 7 Procedure .6 7.1 Temperature dependent test 6 7.2 Long term thermal exposure test.6 8 Report .6 EN 14258:2004 (E) 3 Foreword This document (EN 14258:2004) has been prepared by Technical Comm
14、ittee 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 May 2005, and conflicting national standards shall be withdrawn at the late
15、st by May 2005. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, I
16、taly, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom. EN 14258:2004 (E) 4 Introduction The mechanical properties of adhesively bonded joints are strongly dependent on the temperature at which they are det
17、ermined, and could be altered when subjected to continuous exposures at specified conditions of time and temperature. This document specifies how adhesively bonded joints can be characterised: a) at different temperatures; b) after having been submitted to continuous exposure under specified conditi
18、ons of time and temperature. Characterisation can be determined on different standardised shear specimens according to the type of adhesive being assessed and the purpose of the characterisation itself (comparison or design purposes). However, this standard should not be considered to provide inform
19、ation concerning the general suitability of a structural adhesive for a particular application. Due to the diversity of possible applications and the interactive influences of different adhesive and substrate properties, it is not appropriate to define or determine exposure performance limits. EN 14
20、258:2004 (E) 5 1 Scope This document specifies guidelines for the evaluation of the mechanical behaviour of structural adhesively bonded joints subjected to short and long term exposure at specified conditions of temperature (heat resistance). This is determined by means of measurement of the shear
21、properties of structural adhesively bonded joints. 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
22、any amendments) applies. EN 923:1998, Adhesives Terms and definitions. EN 1465, Adhesives Determination of tensile lap-shear strength of rigid-to-rigid bonded assemblies (ISO 4587:1979 modified). EN 14869-2, Structural adhesives Determination of shear behaviour of structural bonds Part 2 : Thick adh
23、erends shear test (ISO 11003-2:2001, modified). EN ISO 9142, Adhesives Guide to the selection of standard laboratory ageing conditions for testing bonded joints (ISO 9142:2003). ISO 10123, Adhesives Determination of shear strength of anaerobic adhesives using pin-and-collar specimens. 3 Terms and de
24、finitions For the purposes of this document, the terms and definitions given in EN 923:1998 apply. 4 Safety People using this standard shall be familiar with normal laboratory practice. This standard does not purport to address all safety problems, if any, associated with its use. It is the responsi
25、bility of the user to establish health and safety practices and to ensure compliance with any European or regulatory conditions. 5 Apparatus 5.1 Apparatus required to test the specimens at room temperature, in accordance with EN 1465, EN 14869-2 and ISO 10123. 5.2 Tensile test machine, for short ter
26、m testing equipped with an environmental chamber suitable for conditioning and testing the specimens at the desired temperature. 5.3 Environmental chamber, for thermal ageing, complying with the relevant standard or required specification. EN 14258:2004 (E) 6 6 Specimens Specimens shall be prepared
27、in accordance with EN 1465, ISO 10123 or EN 14869-2 as appropriate. Before testing, or initiating the thermal ageing programme, specimens shall be conditioned for 1 day at (23 2) C and a relative humidity of (50 5) %, in accordance with EN ISO 9142. 7 Procedure 7.1 Temperature dependent test For des
28、ign purposes: only EN 14869-2 shall be used; anaerobic adhesives shall only be assessed in accordance with ISO 10123. all other adhesives shall be assessed in accordance with EN 1465 ; Test temperatures should be chosen according to the specific application and according to EN ISO 9142. The specimen
29、s shall be held at the relevant temperature until temperature equilibrium is reached. The tests shall be monitored in accordance with the standard used. 7.2 Long term thermal exposure test For design purposes, only EN 14869-2 shall be used. For comparison purposes: anaerobic adhesives shall only be
30、assessed in accordance with ISO 10123; all other adhesives shall be assessed in accordance with EN 1465 ; Unaged reference specimens shall be prepared and evaluated at (23 2) C. NOTE The tests described in 7.1 can be used as guidance for the selection of exposure temperatures. An exposure time shall
31、 be chosen according to the specific application. The specimens shall be conditioned at the desired temperatures in a suitable environmental chamber (5.3), accurately monitored and controlled for the desired periods of time. After thermal ageing, all specimens shall be conditioned at (23 2) C and a
32、relative humidity of (50 5) % for 24 h prior to testing. The shear specimens shall then be evaluated according to the standard test methods at (23 2) C. 8 Report For the temperature dependent tests the test temperature shall be reported, in addition to the information required for the test report(s)
33、 for the test standard used. Long term thermal exposure time and temperature shall be reported, in addition to the information required for the test report(s) for the test standard used. blankBS EN 14258:2004 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the indep
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