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1、BRITISH STANDARD BS EN ISO 179:1997 Incorporating Amendment Nos. 1 and 2 to BS 2782-3:Method 359:1993 (renumbers BS as BS EN ISO 179:1997) Plastics Determination of Charpy impact strength The European Standard EN ISO 179:1997 has the status of a British Standard IMPORTANT NOTICE. Before reading this
2、 method it is essential to read BS 2782-0 Introduction issued separately ICS 83.080.01 Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 179:1997 This British Standard, having been prepared under the direction of the Plastics and Rub
3、ber Standards Policy Committee, was published under the authority of the Standards Board and comes into effect on 15 September 1993 BSI 09-1999 The following BSI references relate to the work on this standard: Committee reference PRM/21 Draft for comment 91/39455 DC ISBN 0 580 22539 9 Committees res
4、ponsible for this British Standard The preparation of this British Standard was entrusted by the Plastics and Rubber Standards Policy Committee (PRM/-) to Technical Committee PRM/21, upon which the following bodies were represented: British Plastics Federation British Textile Confederation Departmen
5、t of the Environment (Building Research Establishment) Department of Trade and Industry (National Physical Laboratory) Electrical and Electronic Insulation Association (BEAMA Ltd.) GAMBICA (BEAMA Ltd.) Institute of Materials Ministry of Defence Packaging and Industrial Films Association Pira Interna
6、tional RAPRA Technology Ltd. Amendments issued since publication Amd. No.DateComments 8060February 1994 8643August 1997Indicated by a sideline in the margin Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 179:1997 BSI 09-1999i Cont
7、ents Page Committees responsibleInside front cover National forewordii Foreword2 1Scope3 2Normative references3 3Definitions4 4Principle4 5Apparatus4 6Test specimens5 7Procedure8 8Calculation and expression of results8 9Precision9 10Test report9 Annex A (informative) Additional methods for testing t
8、he influence of surface effects13 Annex ZA (normative) Normative references to international publications with their relevant European publications13 Figure 1 Striking edge and support blocks for type 1 test specimens10 Figure 2 Charpy edgewise impact (e), with single notched specimen11 Figure 3 Cha
9、rpy flatwise impact (f)11 Figure 4 Notch types11 Figure 5 Scheme of designations describing the direction of blow12 Figure A.1 Charpy flatwise impact (f) with double-notched specimen13 Table 1 Characteristics of pendulum impact testing machines4 Table 2 Specimen types, dimensions and span5 Table 3 M
10、ethod designations, specimen types, notch type and notch dimensions Materials not exhibiting interlaminar shear fracture6 Table 4 Method designations, specimen types, notch types and notch dimensions Materials exhibiting interlaminar shear fracture7 Table A.1 Parameters for tests on double-notched s
11、pecimens13 List of referencesInside back cover Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI BS EN ISO 179:1997 ii BSI 09-1999 National foreword This British Standard method has been prepared by Technical Committee PRI/21 (formerly PRM/21)
12、 and is the English language version of EN ISO 179: Plastics Determination of Charpy impact strength, published by the European Committee for Standardization (CEN). It is identical with ISO 179:1993 published by the International Organization for Standardization (ISO). It supersedes BS 2782-3:Method
13、 359:1984 which is withdrawn. Revisions of ISO 294 and ISO 2818 are currently in preparation. When these are published it is envisaged that they will be implemented as dual-numbered revisions of BS 2782-9:Method 910A and BS 2782-9:Method 930A, respectively. WARNING NOTE. This British Standard, which
14、 is identical with ISO 179, does 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 Standar
15、d 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. Cross-references International StandardCorresponding Briti
16、sh Standard BS 2782 Methods of testing plastics ISO 291:1977Part 0:1992 Introduction (Appendix A is identical) ISO 293:1986Method 901A:1988 Compression moulding test specimens of thermoplastic material (Identical) ISO 295:1991Method 902A:1992 Compression moulding of test specimens of thermosetting m
17、aterials (Identical) ISO 1268:1974Method 920A to 920C:1977 Preparation of glass fibre reinforced, resin bonded, low-pressure laminated plates or panels for test purposes (Identical) ISO 2557-1:1989Method 940A:1990 Preparation of test specimens of amorphous thermoplastics in the form of bars with a s
18、pecified reversion (Identical) ISO 2557-2:1986Method 940B:1989 Preparation of test specimens of amorphous thermoplastics with a specified reversion by injection moulding rectangular plates (Identical) ISO 2602:1980BS 2846 Guide to statistical interpretation of data Part 2:1981 Estimation of the mean
19、: confidence interval (Identical) ISO 3167:1993BS 2782 Methods of testing plastics Method 931A:1993 Preparation and use of multipurpose test specimens (Identical) Summary of pages This document comprises a front cover, an inside front cover, pages i and ii, the EN ISO title page, pages 2 to 14, an i
20、nside 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 Nov 20 02:16:10 GMT+00:00 2006, Uncontrolled Copy,
21、 (c) BSI EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 179 December 1996 ICS 83.080 Descriptors: Plastics, rigid plastics, tests, Charpy impact tests, test equipment, test specimens, specimen preparation English version Plastics Determination of Charpy impact strength (ISO 179:1993) Plast
22、iques Dtermination de la rsistance au choc Charpy (ISO 179:1993) Kunststoffe Bestimmung der Charpy-Schlagzhigkeit (ISO 179:1993) This European Standard was approved by CEN on 1994-12-14. CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for givi
23、ng 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 obtained on application to the Central Secretariat or to any CEN member. This European Standard exists in three official versi
24、ons (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 Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, D
25、enmark, Finland, 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 3
26、6, B-1050 Brussels 1996 Copyright reserved to CEN members Ref. No. EN ISO 179:1996 E Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 179:1996 BSI 09-1999 2 Foreword The text of the International Standard from Technical Committee ISO/T
27、C 61 “Plastics” of the International Organization for Standardization (ISO) has been taken over as an European Standard by Technical Committee CEN/TC 249 “Plastics”, the secretariat of which is held by IBN. This European Standard shall be given the status of a national standard, either by publicatio
28、n of an identical text or by endorsement, at the latest by June 1997, and conflicting national standards shall be withdrawn at the latest by June 1997. According to CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European
29、Standard: Austria, Belgium, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of the International Standard ISO 179:1993 has been approved by CEN as a European
30、Standard without any modification. NOTENormative references to International Standards are listed in Annex ZA (normative). Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 179:1996 BSI 09-19993 1 Scope 1.1 This International Standard s
31、pecifies a method for determining the Charpy impact strength of plastics under defined conditions. A number of different types of specimen and test configurations are defined. Different test parameters are specified according to the type of material, the type of test specimen and the type of notch.
32、1.2 The method is used to investigate the behaviour of specified types of specimen under the impact conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent in the test conditions. The method has a greater range of applicability than that given
33、in ISO 180 (lzod)1) and is more suitable for the testing of materials showing interlaminar shear fracture or of materials exhibiting surface effects due to environmental factors. 1.3 The method is suitable for use with the following range of materials: rigid thermoplastics moulding and extrusion mat
34、erials, including filled and reinforced compounds in addition to unfilled types; rigid thermoplastics sheets; rigid thermosetting moulding materials, including filled and reinforced compounds; rigid thermosetting sheets, including laminates; fibre-reinforced thermoset and thermoplastics composites i
35、ncorporating unidirectional or non-unidirectional reinforcements such as mat, woven fabrics, woven rovings, chopped strands, combination and hybrid reinforcements, rovings and milled fibres; sheets made from pre-impregnated materials (prepregs); thermotropic liquid-crystal polymers. The method is no
36、t normally suitable for use with rigid cellular materials and sandwich structures containing cellular material. Also, notched specimens are not normally used for long-fibre-reinforced composites or for thermotropic liquid-crystal polymers. 1.4 The method is adapted to the use of specimens which may
37、be either moulded to the chosen dimensions, machined from the central portion of a standard multipurpose test specimen (see ISO 3167) or machined from finished and semifinished products such as mouldings, laminates and extruded or cast sheet. 1.5 The method specifies preferred dimensions for the tes
38、t specimen. Tests which are carried out on specimens of different dimensions and notches, or on specimens which are prepared under different conditions, may produce results which are not comparable. Other factors, such as the energy capacity of the pendulum, its impact velocity and the conditioning
39、of the specimens can also influence the results. Consequently, when comparative data are required, these factors must be carefully controlled and recorded. 1.6 The method should not be used as a source of data for design calculations of components. Information on the typical behaviour of a material
40、can be obtained, however, by testing at different temperatures, by varying the notch radius and/or the thickness and by testing specimens prepared under different conditions. 2 Normative references The following standards contain provisions which, through reference in this text, constitute provision
41、s of this International Standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the standards i
42、ndicated below. Members of IEC and ISO maintain registers of currently valid International Standards. ISO 291:1977, Plastics Standard atmospheres for conditioning and testing. ISO 293:1986, Plastics Compression moulding test specimens of thermoplastic materials. ISO 294:, Plastics Injection moulding
43、 of test specimens of thermoplastic materials2). ISO 295:1991, Plastics Compression moulding of test specimens of thermosetting materials. ISO 1268:1974, Plastics Preparation of glass fibre reinforced, resin bonded, low-pressure laminated plates or panels for test purposes. ISO 2557-1:1989, Plastics
44、 Amorphous thermoplastics Preparation of test specimens with a specified maximum reversion Part 1: Bars. ISO 2557-2:1986, Plastics Amorphous thermoplastics Preparation of test specimens with a specified reversion Part 2: Plates. ISO 2602:1980, Statistical interpretation of test results Estimation of
45、 the mean Confidence interval. 1) ISO 180:1993, Plastics Determination of lzod impact strength. 2) To be published. (Revision of ISO 294:1975) Licensed Copy: sheffieldun sheffieldun, na, Mon Nov 20 02:16:10 GMT+00:00 2006, Uncontrolled Copy, (c) BSI EN ISO 179:1996 4 BSI 09-1999 ISO 2818:, Plastics
46、Preparation of test specimens by machining3). ISO 3167:, Plastics Multipurpose test specimens4). 3 Definitions For the purposes of this International Standard, the following definitions apply. 3.1 charpy impact strength of unnotched specimens acU impact energy absorbed in breaking an unnotched speci
47、men, referred to the original cross-sectional area of the specimen it is expressed in kilojoules per square metre (kJ/m2) 3.2 charpy impact strength of notched specimens acN impact energy absorbed in breaking a notched specimen, referred to the original cross-sectional area of the specimen at the no
48、tch, where N = A, B or C depending on the notch type (see 6.3.1.1.2) it is expressed in kilojoules per square metre (kJ/m2) 3.3 edgewise impact (e) direction of blow parallel to the dimension b, with impact on the narrow longitudinal surface h l of the specimen (see Figure 1, left, and Figure 2 and
49、Figure 5) 3.4 flatwise impact (f) direction of blow parallel to the dimension h, with impact on the broad longitudinal surface b l of the specimen (see Figure 1, right, and Figure 3 and Figure 5) 3.5 normal impact (n) direction of blow normal to the plane of reinforcement (see Figure 5) it is used for laminar-type reinforced plastics 3.6 parallel impact (p) direction of blow parallel to the plane of reinforcement (see Figure 5) 4 Principle The test specimen, supported as a horizontal beam,