BS-EN-ISO-178-1997 BS-2782-3-METHOD-335A-1993 ISO-178-1993.pdf
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1、BRITISH STANDARD BS EN ISO 178:1997 BS 2782-3: Method 335A: 1993 ISO 178:1993 Incorporating Amendment No. 1 to BS 2782-3: Method 335A:1993 (renumbers BS as BS EN ISO 178:1997) Plastics Determination of flexural properties The European Standard EN ISO 178:1996 has the status of a British Standard IMP
2、ORTANT NOTE. Before reading this method it is essential to read BS 2782-0, Introduction, issued separately. ICS 83.080.01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 178:1997 This British Standard, having been prepared under th
3、e direction of the Plastics and Rubber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1993 BSI 09-1999 First published August 1978 Second edition September 1993 The following BSI references relate to the work on this standar
4、d: Committee reference PRM/21 Draft for comment 91/38214 DC ISBN 0 580 22258 6 Committees responsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRI/-) to Technical Committee PRI/21, upon which the following
5、 bodies were represented: British Plastics Federation British Textile Confederation Department of the Environment (Building Research Establishment) Department of Trade and Industry (National Physical Laboratory) Electrical and Electronic Insulation Association (BEAMA Ltd.) GAMBICA (BEAMA Ltd.) Insti
6、tute of Materials Ministry of Defence Packaging and Industrial Films Association Pira International PAPRA Technology Ltd. Amendments issued since publication Amd. No.DateComments 8638June 1997Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:45 GMT+00
7、:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 178:1997 BSI 09-1999i Contents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Definitions4 4Principle4 5Apparatus5 6Test specimens5 7Conditioning8 8Procedure8 9Calculation and expression of re
8、sults9 10Precision9 11Test report9 Figure 1 Typical curves of flexural stress of f versus flexural strain f and deflection s6 Figure 2 Position of test specimen at the start of the test7 Figure 3 Position of test specimen in relation to direction of product and direction of force8 Table 1 Recommende
9、d values for the speed of testing6 Table 2 Values for the width b in the relation to the thickness h7 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 178:1997 ii BSI 09-1999 National foreword Thi
10、s method has been prepared by Technical Committee PRI/21 and is the English language version of EN ISO 178:1996 Plastics Determination of flexural properties. It is identical with ISO 178:1993, published by the International Organization for Standardization (ISO). It supersedes BS 2782:Method 335A:1
11、978 which is withdrawn. The Technical Committee has reviewed the provisions of ISO 1209-1:1990, ISO 1209-2:1990 and ISO 5893:1985 to which normative reference is made in the text, and has decided that they are acceptable for use in conjunction with this standard. Cross-references International Stand
12、ardCorresponding British Standard BS 2782 Methods of testing plastics ISO 291:1977Part 0:1995 Introduction (Appendix A is identical) ISO 293:1986Method 901A:1988 Compression moulding test specimens of thermoplastic materials (Identical) ISO 294:1975Method 910A:1977 Injection moulding test specimens
13、of thermoplastic materials (Identical) ISO 295:1991Method 902A:1992 Compression moulding of test specimens of thermosetting materials (Identical) ISO 1268:1974Methods 920A to 920C:1977 Preparation of glass fibre reinforced, resin bonded, low-pressure laminated plates or panels for test purposes (Ide
14、ntical) ISO 2557-1:1989Method 940A:1990 Preparation of test specimens of amorphous thermoplastics in the form of bars with a specified reversion (Identical) ISO 2557-2:1986Method 940B:1989 Preparation of test specimens of amorphous thermoplastics with a specified reversion by injection moulding rect
15、angular plates (Identical) ISO 2602:1980BS 2846 Guide to statistical interpretation of data Part 2:1981 Estimation of the mean: confidence interval (Identical) ISO 2818:1980BS 2782 Methods of testing plastics Method 930A:1977 Preparation of test specimens by machining (Technically equivalent) ISO 31
16、67:1983Method 931A:1993 Preparation and use of multipurpose test specimens (Identical) Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 178:1997 BSI 09-1999iii WARNING NOTE. This British Standard, which is identical with ISO 178, do
17、es not necessarily detail all the precautions necessary to meet the requirements of the Health and Safety at Work etc. Act 1974. Attention should be paid to any appropriate safety precautions and the method should be operated only by trained personnel. A British Standard does not purport to include
18、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. Summary of pages This document comprises a front cover, an inside front cover, pages i t
19、o iv, the EN ISO title page, pages 2 to 10, 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, Mon No
20、v 20 02:16:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI iv blank Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:45 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 178 December 1996 ICS 83.080 Descriptors: Plastics, tests, bend tests,
21、 determination, flexural strength, test specimens English version Plastics Determination of flexural properties (ISO 178:1993) Plastiques Dtermination des proprits en flexion (ISO 178:1993) Kunststoffe Bestimmung der Biegeeigenschaften (ISO 178:1993) This European Standard was approved by CEN on 199
22、4-12-14. 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 obta
23、ined 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 its own language and notified to the Central Secr
24、etariat 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, Switzerland and United Kingdom. CEN European Committe
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