1、BRITISH STANDARD AEROSPACE SERIES BS EN 2155-13:1993 Test methods for transparent materials for aircraft glazing Part13: Determination of temperature at deflection under load The European StandardEN2155-13:1993 has the status of a British Standard UDC 629.73.023.26:620.1:536.4BSEN2155-13:1993 This B
2、ritish Standard, having been prepared under the directionof the Aerospace Standards Policy Committee, waspublished under the authorityof the Standards Boardand comes into effecton 15April1993 BSI 12-1999 The following BSI references relate to the work on this standard: Committee reference ACE/62 Dra
3、ft for comment90/70825 DC ISBN 0 580 22066 4 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 Normungsinstitut
4、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 Iceland Ire
5、land 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 Normalizaci
6、n y Certificacin Sweden Standardiseringskommissionen i Sverige Switzerland Association suisse de normalisation UnitedKingdom British Standards Institution Amendments issued since publication Amd. No. Date CommentsBSEN2155-13:1993 BSI 12-1999 i Contents Page Cooperating organizations Inside front cov
7、er National foreword ii Foreword 2 Text of EN 2155-13 3 National annex NA (informative) Committees responsible Inside back coverBSEN2155-13:1993 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
8、 language version of EN2155-13:1993, Aerospace Series Test methods for transparent materials foraircraft glazing Part13: Determination of temperature at deflection under load, published by the European Committee for Standardization (CEN). EN2155-13 was produced as a result of international discussio
9、n in which the UK took an active part. A British Standard does not purport to include all the 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. Su
10、mmary of pages This document comprises a front cover, an inside front cover, pages i and ii, theEN 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 ta
11、ble on the inside front cover.EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN2155-13 February 1993 UDC 629.73.023.26:620.1:536.4 Descriptors: Aircraft industry, glazing, glass, transparent plastics, bend test, flexing, determination, temperature English version Aerospace series Test methods for
12、 transparent materials for aircraft glazing Part13: Determination of temperature at deflection underload Srie arospatiale Mthode dessais pour matriaux transparents pour vitrages aronautiques Partie13: Dtermination de la temprature de flechissement sous charge Luft- und Raumfahrt Prfverfahren fr tran
13、sparente Werkstoffe zur Verglasung von Luftfahrzeugen Teil13: Bestimmung der Temperatur bei Durchbiegung unter Belastung 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 E
14、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
15、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
16、inland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. CEN European Committee for Standardization Comit Europen de Normalisation Europisches Komitee fr Normung Central Secretariat: rue de Stassart 36, B-1050
17、Brussels 1993 Copyright reserved to CEN members Ref. No. EN 2155-13:1993 EEN2155-13:1993 BSI 12-1999 2 Foreword This European 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 Associat
18、ion, 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 European Standard shall be given the status of a national standard, either by publication of an identical text or
19、by endorsement, at the latest by August1993, and conflicting national standards shall be withdrawn at the latest by August1993. According to the CEN/CENELEC Internal Regulations, the following countries are bound to implement this European Standard: Austria, Belgium, Denmark, Finland, France, German
20、y, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and UnitedKingdom. Contents Page Foreword 2 1 Scope and field of application 3 2 Definitions 3 3 Apparatus 3 4 Specimens 4 4 Conditioning 4 5 Procedure 4 6 Test report 4 Figure 1 Apparatus for d
21、etermination oftemperature at deflection under load 5 Figure 2 Sampling from sheet 6 Figure 3 Specimen and load application 6 Table Deflections 4EN2155-13:1993 BSI 12-1999 3 1 Scope and field of application 1.1 This standard specifies a procedure for determining the temperature at which an arbitrary
22、 deformation occurs when the specimens are subjected to arbitrary bending loads, under conditions of continually rising temperatures. 1.2 The procedure applies to materials in sheet form in thicknessesW 3mm. It does not apply to stretched/pressed (homogenous) acrylic materials. 2 Definitions For the
23、 purpose of this test the temperature of deflection under load is that temperature (attained during conditions of steady increase of temperature) at which a specimen of the material exhibits a specified deflection. 3 Apparatus 3.1 The apparatus used is constructed essentially as shown inFigure 1 and
24、 shall conform to the description given below. 3.2 Specimen supports The specimen rests horizontally on metal supports (seeFigure 1); the load is applied vertically on the upper face of the specimen at midway between supports by means of a rod. The vertical members, which attach the specimen support
25、s to the upper plate are made of material having the same coefficient of linear expansion as is used for the rod (seenote). NOTEUnless these parts have the same coefficient of linear expansion, the differential change in length of these parts introduces an error in the reading of the apparent deform
26、ation of the specimen. A blank test is made on each apparatus using a test bar made of rigid material having a low coefficient of expansion 1) . All temperature ranges to be used shall be covered and a correction factor is determined for each temperature. If the correction factor is0,010mm or greate
27、r, its algebraic sign is noted and the factor is applied to each test by adding it algebraically to the reading of apparent deflection of the tested specimens. 3.3 Immersion bath The specimen is immersed in a suitable liquid heat-transfer medium (seenote). The bath is well stirred during the test an
28、d provided with a means ofraising the temperature at an average rate of2 C/min and the temperature shall not deviate from the average by more than 1 C at any time measured over periods of5min. NOTEA liquid heat-transfer medium is chosen which is stable and which does not affect the specimen at the t
29、emperatures used. 3.4 Weights A set of weights of suitable sizes is made available so that the specimen can be loaded to a fibre stress of1,8MPa. The weight of the rod which applies the testing force is determined and included as part of the total load. If a dial gauge is used, the force exerted by
30、its spring is determined and included as part of the total load (seenotes1 and2). The load is calculated from the following formula: where The actual load applied is the calculated load 2,5%. The dimensions of the cross-section of the specimen used in the calculation are measured to the nearest0,02m
31、m. The space between supports is measured to the nearest0,1mm. NOTE 1In certain forms of the apparatus, the force of the dial gauge spring is directed upward and shall be subtracted from the load, while in other forms this force acts downward and shall be added to the load. NOTE 2Since the force exe
32、rted by the spring in certain dial gauges varies considerably over the stroke, this force is measured in that part of the stroke which is to be used. 3.5 Thermometers The thermometer is a mercury in glass thermometer of the partial immersion type, graduated in C. The graduation marks shall permit re
33、ading1 C and the scale error at any reading shall not exceed0,5 C. The thermometers are immersed to the depth for which they have been calibrated and which shall be at least50mm. 3.6 Preparation of apparatus The apparatus is arranged so that the deflection of the midpoint of the specimen can be meas
34、ured on a scale calibrated in hundredths of1mm. The apparatus may be arranged to shut off the heat automatically and sound an alarm when the deflection specified in theTable has been reached. 1) Invar or borosilicate glass has been found suitable for this purpose. F = Total load in N of the rod and
35、weights with due allowance for any force exerted by the spring of a dial gauge = 1,8 MPa B = Width of specimen in mm d = Depth of specimen in mm l = Width of span between supports in mm. F 2 B d 2 3 l - =EN2155-13:1993 4 BSI 12-1999 4 Specimens 4.1 At least two specimens are used to test each sample
36、. The specimens are at least110mm in length, between3,0mm and13,0mm in width and between10,0mm and13,0mm in depth. The specimens are cut from sheet material as indicated inFigure 2 their width corresponding to the thickness of the sheet. 4.2 If the thickness of the sheet exceeds13,0mm, the width of
37、the specimens shall be reduced to13,0mm by machining of one face, the other face being left untouched. 5 Conditioning The specimens shall be conditioned in an air circulating oven for48h at(80 2) C, followed by cooling to room temperature in a desiccator until tested. 6 Procedure The specimen is pla
38、ced in the apparatus the load being applied as showninFigure 1 andFigure 3. The thermometers extend to within10mm of the specimen but shall not touch it. The temperature of the bath shall be20 C to23 C at the start of each test, unless previous tests have shown that, for the particular materials und
39、er test, no error is introduced by starting at other temperatures. The load is adjusted to give a fibre stress of1,8MPa, as calculated by the formula given inclause3.4. The load is allowed to act for5min (seenote) the zero reading or setting of the measuring device is then made and the heating start
40、ed. Tests are conducted by raising the temperature of the bath, as required inclause3.3. The temperature at which the bar has reached the arbitrary deflection as given in theTable is recorded as the temperature of deflection under load at1,8MPa fibre stress. Table Deflections NOTEThe5min waiting per
41、iod is provided to compensate partially for the creep exhibited by certain materials at room temperature when subjected to the prescribed fibre stress. That part of the creep which occurs in the initial5min is usually a large fraction of that which occurs in the first30min. This waiting period may b
42、e omitted when testing materials which show no appreciable creep during the initial5min. 7 Test report The test report shall include: reference to this standard, B and d of the specimens measured to the nearest0,02mm, the temperature of deflection under load for each specimen in C and the fibre stre
43、ss, the nature of the immersion medium, any peculiar characteristics of the specimens noted during the test or after removal from the apparatus. Dimensions in millimetres Depth d Deflection 10,0 to 10,39 10,4 to 10,69 10,7 to 10,99 11,0 to 11,49 11,5 to 11,99 12,0 to 12,39 12,4 to 12,79 12,8 to 13,0
44、 0,32 0,31 0,30 0,29 0,28 0,27 0,26 0,25EN2155-13:1993 BSI 12-1999 5 Figure 1 Apparatus for determination of temperature at deflection under loadEN2155-13:1993 6 BSI 12-1999 Figure 2 Sampling from sheet Figure 3 Specimen and load applicationBSEN2155-13:1993 BSI 12-1999 National annex NA (informative
45、) Committees responsible The UnitedKingdom participation in the preparation of this European Standard was 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 Soci
46、ety of British Aerospace Companies LimitedBS EN 2155-13:1993 BSI 389 Chiswick High Road London W4 4AL BSIBritishStandardsInstitution BSI is the independent national body responsible for preparing BritishStandards. It presents the UK view on standards in Europe and at the international level. It is i
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