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1、BRITISH STANDARD AEROSPACE SERIES BS EN 2155-14:1993 Test methods for transparent materials for aircraft glazing Part 14: Determination of the 1/10 Vicat softening temperature The European Standard EN 2155-14:1993 has the status of a British Standard UDC 629.73.023.26:620.1:536.421.2 Licensed Copy:
2、sheffieldun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2155-14:1993 This British Standard, having been prepared under the direction of the Aerospace Standards Policy Committee, was published under the authority of the Standards Board and comes into effect o
3、n 15 April 1993 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/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 pre
4、pared, comprises the national standards organizations of the following countries: AustriaOesterreichisches Normungsinstitut BelgiumInstitut belge de normalisation DenmarkDansk Standardiseringsraad FinlandSuomen Standardisoimisliito, r.y. FranceAssociation franaise de normalisation GermanyDeutsches I
5、nstitut fr Normung e.V. GreeceHellenic Organization for Standardization IcelandTechnological Institute of Iceland IrelandNational Standards Authority of Ireland ItalyEnte Nazionale Italiano di Unificazione LuxembourgInspection du Travail et des Mines NetherlandsNederlands Normalisatie-instituut Norw
6、ayNorges Standardiseringsforbund PortugalInstituto Portugus da Qualidade SpainAsociacin Espaola de Normalizacin y Certificacin SwedenStandardiseringskommissionen i Sverige SwitzerlandAssociation suisse de normalisation United KingdomBritish Standards Institution Amendments issued since publication A
7、md. No.DateComments Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2155-14:1993 BSI 12-1999i Contents Page Cooperating organizationsInside front cover National forewordii Foreword2 Introduction3 1Scope and field of application3 2Princ
8、iple3 3Apparatus3 4Specimens3 5Procedure3 6Test report4 Figure Schematic diagram of apparatus for the determination of the Vicat softening temperature5 National annex NA (informative) Committees responsibleInside back cover Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 20
9、06, Uncontrolled Copy, (c) BSI BS EN 2155-14:1993 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 EN 2155-14:1993 Aerospace series Test methods for transparent materials fo
10、r aircraft glazing Part 14: Determination of the 1/10 Vicat softening temperature, published by the European Committee for Standardization (CEN). EN 2155-14 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 th
11、e 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, pages i and ii,
12、 the EN title page, pages 2 to 6, 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. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55
13、:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN 2155-14 February 1993 UDC 629.73.023.26:620.1:536.421.2 Descriptors: Aircraft industry, glazing, transparent plastics, glass, tests, determination, softening point English version Aerospace series Tes
14、t methods for transparent materials for aircraft glazing Part 14: Determination of the 1/10 Vicat softening temperature Srie arospatiale Mthodes dessais pour matriaux transparents pour vitrages aronautiques Partie 14: Dtermination du point de ramollissement Vicat 1/10 Luft- und Raumfahrt Prfverfahre
15、n fr transparente Werkstoffe zur Verglasung von Luftfahrzeugen Teil 14: Bestimmung der 1/10-Vicat Erweichungstemperatur This European Standard was approved by CEN on 1993-02-19. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this E
16、uropean 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 Central Secretariat or to any CEN member. This European Standard exists in three official versions (Engl
17、ish, 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 Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Denmark, F
18、inland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050
19、 Brussels 1993 Copyright reserved to CEN members Ref. No. EN 2155-14:1993 E Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2155-14:1993 BSI 12-1999 2 Foreword This European Standard has been prepared by the European Association of Aerosp
20、ace 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 member countries of AECMA, prior to its presentation to CEN. This Euro
21、pean 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 1993, and conflicting national standards shall be withdrawn at the latest by August 1993. According to the CEN/CENELEC Internal Regulations, the follo
22、wing 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 Kingdom. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55:4
23、0 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2155-14:1993 BSI 12-19993 Introduction The method described in this standard differs from ISO 306, method A, in the penetration depth. 1 Scope and field of application This standard specifies the method used for the determination of the 1/10 VICAT soft
24、ening temperature of transparent thermoplastic materials used for aircraft glazing. 2 Principle Determination of the temperature at which a standard indenter under a load of 9,81 N penetrates 0,1 mm into the surface of a test specimen; this temperature is attained during a defined uniform rate of in
25、crease of temperature. The temperature corresponding to the 0,1 mm penetration is called 1/10 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 an
26、d vertically, the base of the frame serving to support the specimen under the indenter at the end of the rod (see Figure). 3.2 Indenting tip An indenting tip, preferably of hardened steel, 3 mm long, of circular cross-section and area (1,000 0,015) mm2 is fixed at the bottom of the rod. The lower su
27、rface of the indenting tip shall be flat and perpendicular 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 of 0,01 mm, shall be used to measure the
28、penetration of the indenter into the specimen. The thrust of the dial gauge, which contributes to the thrust on the specimen, shall be known and shall comply with clause 3.4 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
29、load applied to the test specimen can be made up to between 9,81 N and 10,30 N. The combined masses of the rod, indenter and load carrying plate shall not exceed 100 g. NOTEThe construction of the apparatus shall be such that the micrometer dial gauge reading caused by differential thermal expansion
30、 over the intended temperature range does not exceed 0,02 mm when 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
31、note 1), shall be provided in which the apparatus is placed so that the specimen is at least 35 mm 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 p
32、er hour (see note 2). 3.6 A mercury in glass thermometer (or other accurate temperature measuring device), of appropriate range and with graduations at least at each 0,5 K shall be used to measure temperature. The scale error at any reading shall not exceed 0,5 K. NOTE 1A suitable liquid heat transf
33、er media shall be used. In all cases, it shall be established that the liquid 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 la
34、tter is strongly recommended. One method of operation found to be satisfactory 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
35、 adjustment of a rheostat or variable transformer. NOTE 3It is desirable to 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
36、rate of temperature rise. 4 Specimens 4.1 Two specimens shall be used to test 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 exceeds 6 mm, the specimens sh
37、all be reduced in thickness to approximately 3 mm by machining one surface, the other surface being left intact, b) if the thickness of the sheet is less than 3 mm, not more than three pieces shall be stacked together to give a total thickness of between 3 mm and 6 mm. 5 Procedure 5.1 The specimen i
38、s mounted horizontally under the indenting tip (3.2) of the unloaded rod (3.1) see Figure. The tip of the indenter shall at no point be nearer to the edge of the test specimen than 3 mm. The surface of the test specimen in contact with the base of the apparatus shall be flat. Licensed Copy: sheffiel
39、dun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN 2155-14:1993 4 BSI 12-1999 5.2 The assembly is immersed in the heating bath (3.5), the temperature of which shall be constant and at least 50 K below the expected softening temperature of the material (see note 3,
40、 clause 3). 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 the total thrust on the specimen is between 9,81 N and 10,30 N. After 5 min, with the indenter st
41、ill 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 well stirred during the test. 5.5 The temperature of the bath at which the indenting tip has
42、 penetrated into the specimen by 0,1 mm beyond its starting position defined in clause 5.3 is noted and recorded as the 1/10 VICAT softening temperature (1/10 VST) of the specimen. 5.6 The 1/10 VST of the material under test is expressed as the arithmetic mean of the 1/10 VSTs of two specimens. If t
43、he individual results differ by more than 2 K 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 softening temperature (1/10 VST) of the material, if composite specimens are used,
44、 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 apparatus. Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 20
45、06, Uncontrolled Copy, (c) BSI EN 2155-14:1993 BSI 12-19995 Figure Schematic diagram of apparatus for the determination of the Vicat softening temperature Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI 6 blank Licensed Copy: sheffieldun she
46、ffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2155-14:1993 BSI 12-1999 National annex NA (informative) Committees responsible The United Kingdom participation in the preparation of this European Standard was entrusted by the Aerospace Standards Policy Committee (
47、ACE/-) to Technical Committee ACE/62 upon which the following bodies were represented: British Plastics Federation Ministry of Defence Society of British Aerospace Companies Limited Licensed Copy: sheffieldun sheffieldun, na, Thu Nov 02 17:55:40 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN 2155-
48、14:1993 BSI 389 Chiswick High Road London W4 4AL BSI British Standards Institution BSI is the independent national body responsible for preparing British Standards. It presents the UK view on standards in Europe and at the international level. It is incorporated by Royal Charter. Revisions British S
49、tandards are updated by amendment or revision. Users of British Standards should make sure that they possess the latest amendments or editions. It is the constant aim of BSI to improve the quality of our products and services. We would be grateful if anyone finding an inaccuracy or ambiguity while using this British Standard would inform the Secretary of the technical committee responsible, the identity of which can be found on the inside front cover. Tel: 020 8996 9000. Fax: 020 8996 7400. BSI offers members an individu
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