1、BRITISH STANDARD AEROSPACE SERIES BS EN 2155-14:1993 Test methods for transparent materials for aircraft glazing Part 14: Determination of the1/10 Vicat softening temperature The European Standard EN 2155-14:1993 has the status of a British Standard UDC 629.73.023.26:620.1:536.421.2BS EN2155-14:1993
2、 This British Standard, having been prepared under the directionof the Aerospace Standards Policy Committee,waspublished underthe authorityof the Standards Board and comes into effect on 15April1993 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE
3、/62 Draft for comment 91/74928 DC ISBN 0 580 22067 2 Cooperating organizations The European Committee for Standardization (CEN), under whose supervision this European Standard was prepared, comprises the national standards organizations of the following countries: Austria Oesterreichisches Normungsi
4、nstitut Belgium Institut belge de normalisation Denmark Dansk Standardiseringsraad Finland Suomen Standardisoimisliito, r.y. France Association franaise de normalisation Germany Deutsches Institut fr Normung e.V. Greece Hellenic Organization for Standardization Iceland Technological Institute of Ice
5、land Ireland National Standards Authority of Ireland Italy Ente Nazionale Italiano di Unificazione Luxembourg Inspection du Travail et des Mines Netherlands Nederlands Normalisatie-instituut Norway Norges Standardiseringsforbund Portugal Instituto Portugus da Qualidade Spain Asociacin Espaola de Nor
6、malizacin y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation United Kingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBS EN2155-14:1993 BSI 12-1999 i Contents Page Cooperating organizations Inside
7、 front cover National foreword ii Foreword 2 Introduction 3 1 Scope and field of application 3 2 Principle 3 3 Apparatus 3 4 Specimens 3 5 Procedure 3 6 Test report 4 Figure Schematic diagram of apparatus for the determination of the Vicat softening temperature 5 National annex NA (informative) Comm
8、ittees responsible Inside back coverBS EN2155-14:1993 ii BSI 12-1999 National foreword This British Standard has been prepared under the direction of the Aerospace Standards Policy Committee and is the English language version of EN2155-14:1993 Aerospace series Test methods for transparent materials
9、 for aircraft glazing Part 14: Determination of the1/10 Vicat softening temperature, published by the European Committee for Standardization (CEN). EN2155-14 was produced as a result of international discussion in which the UK took an active part. A British Standard does not purport to include all t
10、he necessary provisions of a contract. Users of British Standards are responsible for their correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. Summary of pages This document comprises a front cover, an inside front cover, pagesi andii,
11、theEN title page, pages2 to6, an inside back cover and a back cover. This standard has been updated (see copyright date) and may have had amendments incorporated. This will be indicated in the amendment table on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN2155-14 Febru
12、ary1993 UDC629.73.023.26:620.1:536.421.2 Descriptors: Aircraft industry, glazing, transparent plastics, glass, tests, determination, softening point English version Aerospace series Test methods for transparent materials for aircraft glazing Part 14: Determination of the1/10 Vicat softening temperat
13、ure Srie arospatiale Mthodes dessais pour matriaux transparents pour vitrages aronautiques Partie 14: Dtermination du point de ramollissement Vicat1/10 Luft- und Raumfahrt Prfverfahren fr transparente Werkstoffe zur Verglasung von Luftfahrzeugen Teil 14: Bestimmung der1/10-Vicat Erweichungstemperatu
14、r This European Standard was approved by CEN on1993-02-19. 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 referen
15、ces concerning such national standards may be obtained on application to the Central Secretariat 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
16、 its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Swi
17、tzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050 Brussels 1993 Copyright reserved to CEN members Ref. No. EN2155-14:1993 EEN2155-14:1993 BSI 12-1999 2 Foreword This Eur
18、opean Standard has been prepared by the European Association of Aerospace Manufacturers (AECMA). After inquiries and votes carried out in accordance with the rules of this Association, this standard has successively received the approval of the National Associations and the Official Services of the
19、member countries of AECMA, prior to its presentation to CEN. 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 August1993, and conflicting national standards shall be withdrawn at the latest by Augu
20、st1993. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kin
21、gdom.EN2155-14:1993 BSI 12-1999 3 Introduction The method described in this standard differs from ISO306, method A, in the penetration depth. 1 Scope and field of application This standard specifies the method used for the determination of the1/10 VICAT softening temperature of transparent thermopla
22、stic materials used for aircraft glazing. 2 Principle Determination of the temperature at which a standard indenter under a load of9,81N penetrates0,1mm into the surface of a test specimen; this temperature is attained during a defined uniform rate of increase of temperature. The temperature corresp
23、onding to the0,1mm penetration is called1/10 VICAT softening temperature; it is expressed in C. 3 Apparatus The apparatus consists essentially of: 3.1 A rod provided with a load carrying plate, held in a rigid metal frame so that it can move freely and vertically, the base of the frame serving to su
24、pport the specimen under the indenter at the end of the rod (seeFigure). 3.2 Indenting tip An indenting tip, preferably of hardened steel,3mm long, of circular cross-section and area(1,000 0,015)mm 2is fixed at the bottom of the rod. The lower surface of the indenting tip shall be flat and perpendic
25、ular to the axis of the rod and free from burrs. 3.3 Micrometer dial gauge (or other suitable measuring instrument) A micrometer dial gauge (or other suitable measuring instrument), graduated in divisions of0,01mm, shall be used to measure the penetration of the indenter into the specimen. The thrus
26、t of the dial gauge, which contributes to the thrust on the specimen, shall be known and shall comply with clause3.4 below. 3.4 A load carrying plate shall be fitted to the rod(3.1) and a slotted weight adjusted centrally such that the total load applied to the test specimen can be made up to betwee
27、n9,81N and10,30N. The combined masses of the rod, indenter and load carrying plate shall not exceed100g. NOTEThe construction of the apparatus shall be such that the micrometer dial gauge reading caused by differential thermal expansion over the intended temperature range does not exceed0,02mm when
28、the specimen is replaced by a piece of borosilicate glass or low thermal expansion alloy steel. It is recommended that the apparatus be constructed of low thermal expansion alloy. 3.5 A heating bath, containing a suitable liquid (see note1), shall be provided in which the apparatus is placed so that
29、 the specimen is at least35mm below the surface of the liquid. An efficient stirrer shall be provided. The heating bath shall be equipped with a means of control so that the temperature can be raised at a uniform rate of(50 5)K per hour (see note2). 3.6 A mercury in glass thermometer (or other accur
30、ate temperature measuring device), of appropriate range and with graduations at least at each0,5K shall be used to measure temperature. The scale error at any reading shall not exceed0,5K. NOTE 1A suitable liquid heat transfer media shall be used. In all cases, it shall be established that the liqui
31、d chosen is stable at the temperature used and does not affect the material under test. NOTE 2A uniform rate of temperature rise can be obtained by controlling the heat input either manually or automatically, although the latter is strongly recommended. One method of operation found to be satisfacto
32、ry is to provide an immersion heater adjusted to give the correct rate of temperature rise at the starting temperature of the test and then to increase the power input (either in the same heater or in a subsidiary heater) by adjustment of a rheostat or variable transformer. NOTE 3It is desirable to
33、have a cooling coil in the liquid bath in order to reduce the time required to lower the temperature after previous determinations. It shall be removed or drained before starting a test, as boiling of coolant may affect the rate of temperature rise. 4 Specimens 4.1 Two specimens shall be used to tes
34、t each sample. Their surfaces shall be flat and parallel. 4.2 For sheet materials, the thickness of the test specimens shall be equal to the thickness of the sheet. However: a) if the thickness exceeds6mm, the specimens shall be reduced in thickness to approximately3mm by machining one surface, the
35、other surface being left intact, b) if the thickness of the sheet is less than3mm, not more than three pieces shall be stacked together to give a total thickness of between3mm and6mm. 5 Procedure 5.1 The specimen is mounted horizontally under the indenting tip (3.2) of the unloaded rod (3.1) seeFigu
36、re. The tip of the indenter shall at no point be nearer to the edge of the test specimen than3mm. The surface of the test specimen in contact with the base of the apparatus shall be flat.EN2155-14:1993 4 BSI 12-1999 5.2 The assembly is immersed in the heating bath(3.5), the temperature of which shal
37、l be constant and at least50K below the expected softening temperature of the material (see note3, clause3). The bulb of the thermometer(3.6) shall be at the same level as, and as close as is practical to the specimen. 5.3 The slotted weight is then added to the load carrying plate (3.4) such that t
38、he total thrust on the specimen is between9,81N and10,30N. After5min, with the indenter still in position, the reading of the micrometer dial gauge is noted or the micrometer (3.3) is set to zero. 5.4 The temperature of the bath is then raised at a uniform rate of (50 5)K per hour. The liquid is wel
39、l stirred during the test. 5.5 The temperature of the bath at which the indenting tip has penetrated into the specimen by0,1mm beyond its starting position defined in clause5.3 is noted and recorded as the1/10 VICAT softening temperature (1/10 VST) of the specimen. 5.6 The 1/10 VST of the material u
40、nder test is expressed as the arithmetic mean of the1/10 VSTs of two specimens. If the individual results differ by more than2K it shall be verified that the test has been carried out correctly. 6 Test report The test report shall include the following information: reference to this standard, VICAT
41、softening temperature (1/10 VST) of the material, if composite specimens are used, ie more than one layer, then the thickness and number of layers shall be stated, the nature of the immersion medium, any particular characteristics of the specimen noted during the test or after removal from the appar
42、atus.EN2155-14:1993 BSI 12-1999 5 Figure Schematic diagram of apparatus for the determination of the Vicat softening temperature6 blankBS EN2155-14:1993 BSI 12-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard wa
43、s entrusted by the Aerospace Standards Policy Committee (ACE/-) to Technical Committee ACE/62 upon which the following bodies were represented: British Plastics Federation Ministry of Defence Society of British Aerospace Companies LimitedBS EN 2155-14:1993 BSI 389 Chiswick High Road London W4 4AL BS
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