1、BRITISH STANDARD BS EN ISO 14126:1999 Incorporating Technical Corrigendum No. 1 Fibre-reinforced plastic composites Determination of compressive properties in the in-plane direction The European Standard EN ISO 14126:1999 has the status of a British Standard ICS 83.120 BS EN ISO 14126:1999 This Brit
2、ish Standard, having been prepared under the direction of the Sector Committee for Materials and Chemicals, was published under the authority of the Standards Committee and comes into effect on 15 November 1999 BSI 20 February 2003 ISBN 0 580 35231 5 National foreword This British Standard is the En
3、glish language version of EN ISO 14126:1999, including corrigendum July 2002. It is identical with ISO 14126:1999, including Technical Corrigendum July 2001. The UK participation in its preparation was entrusted to Technical Committee PRI/42, Fibre reinforced thermosetting plastics and prepregs, whi
4、ch has the responsibility to: A list of organizations represented on this committee can be obtained on request to its secretary. Cross-references Attention is drawn to the fact that CEN and CENELEC Standards normally include an annex which lists normative references to international publications wit
5、h their corresponding European publications. The British Standards which implement these international or European publications may be found in the BSI Standards Catalogue under the section entitled “International Standards Correspondence Index”, or by using the “Find” facility of the BSI Standards
6、Electronic Catalogue. This publication does not purport to include all the necessary provisions of a contract. Users are responsible for its correct application. Compliance with a British Standard does not of itself confer immunity from legal obligations. aid enquirers to understand the text; presen
7、t to the responsible international/European committee any enquiries on the interpretation, or proposals for change, and keep the UK interests informed; monitor related international and European developments and promulgate them in the UK. Summary of pages This document comprises a front cover, an in
8、side front cover, the EN ISO title page, the EN ISO foreword page, the ISO title page, page ii to iv, pages 1 to 20, an inside back cover and a back cover. The BSI copyright notice displayed in this document indicates when the document was last issued. Amendments issued since publication Amd. No. Da
9、te Comments 14169 Corr. No. 1 20 February 2003 Revision of 1.4EUROPEAN STANDARD NORME EUROPENE EUROPISCHE NORM EN ISO 14126 September 1999 ICS Incorporating corrigendum July 2002 English version F i b r e - r e i n f o r c e d p l a s t i c c o m p o s i t e s D e t e r m i n a t i o n o f c o m p r
10、 e s s i v e p r o p e r t i e s i n t h e in-plane direction (ISO 14126:1999) Composites plastiques renforcs de fibres Dtermination des caractristiques en compression dans le plan (ISO 14126:1999) Faserverstrkte Kunststoffe Bestimmung der Druckeigenschaften in der Laminatebene (ISO 14126:1999) This
11、 European Standard was approved by CEN on 8 August 1999. 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 reference
12、s 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 i
13、ts 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, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spai
14、n, 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 Brussels 1999 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN nat
15、ional Members. Ref. No. EN ISO 14126:1999 EEN ISO 14126:1999 BSI 20 February 2003 2 Foreword The text of the International Standard ISO 14126:1999 has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee CEN/TC 249 “Plastics”, the Secretariat of which i
16、s held by IBN. 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 March 2000, and conflicting national standards shall be withdrawn at the latest by March 2000. According to the CEN/CENELEC Internal
17、Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and
18、the United Kingdom. Endorsement notice The text of the International Standard ISO 14126:1999 was approved by CEN as a European Standard without any modification. NOTE Normative references to International Standards are listed in Annex ZA (normative). Endorsement notice The text of ISO 14126:1999/Cor
19、. 1:2001 has been approved by CEN as a European Corrigendum without any modifications.Contents2001-07-15Corrigendum No. 1Incorporating Technical EN ISO 14126:1999 ii BSI 20 February 2003 Page Foreword iv Introduction 1 1S c o p e 3 2 Normative references 3 3 Definitions 4 4 Principle 5 5 Apparatus 5
20、 5.1 Test machine 5 5.1.1 General 5 5.1.2 Speed of testing 5 5.1.3 Indication of load 5 5.2 Strain measurement 5 5.3 Micrometer 5 5.4 Loading fixtures 5 5.4.1 General 5 5.4.2 Method 1: shear loading 5 5.4.3 Method 2: end loading 6 6 Test specimens 6 6.1 Shape and dimensions 6 6.1.1 Type A specimen 6
21、 6.1.2 Type B specimen 6 6.2 Preparation 6 6.2.1 General 6 6.2.2 End-tab material 6 6.2.3 Application of end tabs 6 6.2.4 Machining the specimens 7 6.3 Checking 7 7 Number of test specimens 7 8 Conditioning 7 9 Procedure 7 10 Expression of results 8 11 Precision 9 12 Test report 9 Annex A (normative
22、) Specimen preparation 13 Annex B (informative) Compression fixtures for method 1 15 Annex C (informative) Compression fixtures for method 2 16 Annex D (informative) Euler buckling criteria 18 Annex ZA (normative) Normative references to international publications with their relevant European public
23、ations 19 Bibliography 20EN ISO 14126:1999 BSI 20 February 2003 iii Page Figure 1 Unidirectionally reinforced composite plate element showing symmetry axes 9 Figure 2 Schematic diagram of compression test specimen and fixture for method 1 10 Figure 3 Schematic diagram of compression test fixture for
24、 method 2 11 Figure 4 Type A and B tabbed-specimen designs 11 Figure 5 Compressive stress/strain diagram 12 Figure 6 Acceptable modes of failure 12 Figure A.1 Tabbed panel for specimen preparation 14 Figure B.1 ASTM D 3410/A (Celanese) test fixture 15 Figure B.2 ASTM D 3410/B (ITTRI) test fixture 15
25、 Figure C.1 ISO 8515 end-loading fixture 16 Figure C.2 ASTM D 695 (modified) type from prEN 2850 17 Table 1 Specimen dimensions 6EN ISO 14126:1999 iv BSI 20 February 2003 Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO mem
26、ber bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmen
27、tal and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Direc
28、tives, Part 3. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. International Standard ISO 14126 was prepared by ISO/TC 61
29、, Plastics, Subcommittee SC 13, Composites and reinforcement fibres. This first edition cancels and replaces ISO 8515:1991, which dealt only with glass-fibre-reinforced plastic composites. Annex A forms a normative part of this International Standard. Annex B to Annex D are for information only.EN I
30、SO 14126:1999 BSI 20 February 2003 1 Introduction This standard is based on ISO 8515, with the scope extended to include all fibre-reinforced plastic composites, such as more recent composites based on carbon and aramid fibres, but retains the test conditions relevant for glass-fibre-reinforced syst
31、ems. Other source documents consulted include ASTM D 3410 (buckling criteria, larger specimen width and longer gauge length), ASTM D 695 (modified version in SACMA SRM1), prEN2850, CRAG 400, DIN 65380 and JIS K 7076 (see bibliography). Several different types of jig, different materials and differen
32、t specimen sizes are covered by these source documents. The table below presents examples, the specimen sizes being given as overall length gauge length width thickness, in millimetres. These test methods use aspect ratios (height/thickness and height/width) for the gauge area covering a range of va
33、lues, which appears undesirable in a test known to be susceptible to buckling failures. Also, new support jigs are still being developed. This International Standard harmonizes and rationalizes the current situation by: a) concentrating on the quality of the test by limiting the maximum bending-buck
34、ling strain allowable at failure (i.e. 10 % as recommended by ASTM see also 5 % level in prEN 2850), so that it is possible to justify an axial-load analysis; b) allowing any design of jig to be used that meets this above requirement, using two methods of loading (i.e. shear and end loaded); c) stan
35、dardizing on two specimen designs, one principally for unidirectional material and one for other materials (the chosen specimen can be used with either loading method); d) adding an informative note as Annex D, which was proposed by ASTM for harmonization purposes, and is taken from ASTM D 3410 (in
36、a modified form). ISO 8515 (GRP) Celanese type 110 13 6,4 2 End block 120 20 10 (3 to 10) prEN 2850 (CFRP) Celanese type 110 10 10 2 ASTM D 695 80 5 12,5 2 Revision includes a machined specimen with co-cured tabs. JIS K 7076 (CFRP) ASTM D 695 78 8 12,5 2 Celanese 134 8 6,5 2 ITTRI 108 8 (6 to 12,5)
37、(1 to 2) ASTM D 3410 (all fibres) Celanese 140 12 6 variable ITTRI 140 (25 to 12) (12 or 25) variable (equations/tables give required thickness for modulus, expected strength and gauge length) DIN 65380 (all fibres) Celanese 112 8 6,35 2 ITTRI 112 8 6,35 2 CRAG 400 (all fibres) Celanese 110 10 10 2
38、SACMA SRM1 (all fibres) ASTM D 695 (modified) 80,8 12,7 4,8 1 (unidir.) or 3 (fabric)2 blankEN ISO 14126:1999 BSI 20 February 2003 3 1 Scope 1.1 This International Standard specifies two methods for determining compressive properties, in directions parallel to the plane of lamination, of fibre-reinf
39、orced plastic composites. 1.2 The compressive properties are of interest for specifications and quality-control purposes. 1.3 Two loading methods and two types of specimen are described. They are: Method 1: provides shear loading of the specimen (gauge length unsupported). Method 2: provides end loa
40、ding, or mixed loading, of the specimen (gauge length unsupported). NOTE For tabbed specimens end-loaded using method 2, some load is transferred into the specimen gauge length by shear through the tabs. Type A specimen: rectangular cross-section, fixed thickness, end-tabbed. Type B specimen: rectan
41、gular cross-section, range of thicknesses, untabbed or end-tabbed (two sizes available). Any combination of test method and specimen may be used, provided that the requirements of subclause 9.8 are satisfied and that the specimen is representative of the material under test. These alternative test c
42、onditions will not necessarily give the same result. The type A specimen is the preferred specimen for unidirectionally reinforced materials tested in the fibre direction. For other materials, the type A or B specimen may be used. The type B2 specimen is preferred for mat, fabric and other multidire
43、ctionally reinforced materials. 1.4 The methods are suitable for fibre-reinforced thermoplastic and thermosetting plastic composites. ISO 604 (see the bibliography) applies to bulk compounds having fibres shorter than 7,5 mm. This is generally the case with materials intended for injection moulding.
44、 1.5 The methods are performed using specimens which may be machined from a test panel made in accordance with ISO 1268 or equivalent methods, or from finished or semi-finished products. 1.6 The methods specify required dimensions for the specimen. Tests which are carried out on specimens of other d
45、imensions, or on specimens which are prepared under different conditions, may produce results which are not comparable. Other factors, such as the speed of testing, the support fixture used and the condition of the specimens, can influence the results. Consequently, when comparative data are require
46、d, these factors must be carefully controlled and recorded. 1.7 Fibre-reinforced plastics are usually anisotropic. It is therefore often useful to cut test specimens in at least the two main directions of anisotropy, or in directions previously specified (for example a lengthwise direction associate
47、d with the production process). 2 Normative references The following normative documents contain provisions which, through reference in this text, constitute provisions of this International Standard. For dated references, subsequent amendments to, or revisions of, any of these publications do not a
48、pply. However, parties to agreements based on this International Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For undated references, the latest edition of the normative document referred to applies. Members o
49、f ISO and IEC maintain registers of currently valid International Standards. ISO 291:1997, Plastics Standard atmospheres for conditioning and testing. ISO 527-1:1993, Plastics Determination of tensile properties Part 1: General principles. ISO 527-4:1997, Plastics Determination of tensile properties Part 4: Test conditions for isotro
