1、May 2011 Translation by DIN-Sprachendienst.English price group 14No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 83
2、.120!$phe“1776966www.din.deDDIN EN ISO 14125Fibre-reinforced plastic composites Determination of flexural properties (ISO 14125:1998 + Cor 1:2001 + Amd 1:2011)English translation of DIN EN ISO 14125:2011-05Faserverstrkte Kunststoffe Bestimmung der Biegeeigenschaften (ISO 14125:1998 + Cor 1:2001 + Am
3、d 1:2011)Englische bersetzung von DIN EN ISO 14125:2011-05Composites plastiques renforcs de fibres Dtermination des proprits de flexion (ISO 14125:1998 + Cor 1:2001 + Amd 1:2011)Traduction anglaise de DIN EN ISO 14125:2011-05SupersedesDIN EN ISO 14125:1998-06 andDIN EN ISO 14125 Corrigendum1:2003-06
4、www.beuth.deDocument comprises pagesIn case of doubt, the German-language original shall be considered authoritative.06.11 25DIN EN ISO 14125:2011-05 A comma is used as the decimal marker. National foreword This standard has been prepared by Technical Committee ISO/TC 61 “Plastics” (EN ISO 14125:199
5、8 and AC:2002, Secretariat: ANSI, USA and A1:2001, Secretariat: SAC, China) in collaboration with Technical Committee CEN/TC 249 “Plastics”, (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe (Plastics Standards Committee), Workin
6、g Committee NA 054-02-02 AA Rieselfhige Duroplaste und langfaserver-strkte Kunststoffe. The International Standards referred to in Clause 2 of this standard have been published as the corresponding DIN EN ISO Standards with the same number. For the International Standards ISO 5893, ISO 2602 and ISO
7、1268 Parts 1 to 11 referred to there are at present no national standards available. The start and finish of text introduced or altered by amendment is indicated in the text by tags !“ or . Amendments This standard differs from DIN EN ISO 14125:1998-06 and DIN EN ISO 14125 Corrigendum 1: 2003-06 as
8、follows: a) Clause 2 “Normative references” has been updated; references are now undated; b) (German version only) in Subclause 4.9, the symbol “Ef” has been replaced by “Er”, “(“ und )” by “(f f)” and “(“ = 0,002 5 und = 0,000 5)” by “(f = 0,002 5 f = 0,000 5)”; c) (German version only) in Subclaus
9、e 5.2.2, the symbol L has been included for Sttzweite (span); d) (German version only) in Subclause 9.3, the word Dehngeschwindigkeit has been replaced by Dehnrate (strain rate); e) in Subclause 10.1.2 relating to method A (three-point flexure) and Subclause 10.2.2 relating to method B (four-point f
10、lexure), the first two lines of the text have been replaced by a new revised text and flexural strains have been specified for high-modulus carbon-fibre-reinforced plastics; f) Clause 12 “Test report”, item n) has been extended; g) (German version only, Figure 1) the symbols “f und f ” have been rep
11、laced by “und ” and the line beginning with “(NB: Die Dehnungen ) (N.B. Strains )” has been transferred under the title of the figure; h) the standard has been editorially revised. Previous editions DIN EN 63: 1977-11 DIN EN ISO 14125: 1998-06 DIN EN ISO 14125 Corrigendum 1: 2003-06 2 EUROPEAN STAND
12、ARD NORME EUROPENNE EUROPISCHE NORM EN ISO 14125 March 1998 + +A1 ICS 83.120 English version Composites plastiques renforcs de fibres Dtermination des proprits de flexion (ISO 14125:1998 + Cor 1 + Amd 1:2011)Faserverstrkte Kunststoffe Bestimmung der Biegeeigenschaften (ISO 14125:1998 + Cor 1 + Amd 1
13、:2011) EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Management Centre: Avenue Marnix 17, B-1000 Brussels 2011 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 14125:1998 + A
14、 A1:2011 EFibre-reinforced plastic composites Determination of flexural properties (ISO 14125:1998 + Cor 1:2001 + Amd 1:2011) ACJuly 2002 February 2011 EN ISO 14125:1998 was approved by CEN on 1998-02-15, Corrigendum AC:2002 on 2002-07-24 and Amendment A1:2011 on 2011-01-31. CEN members are bound to
15、 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 obtained on application to the Manage
16、ment Centre or to any CEN member. The European Standards exist 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 Management Centre has the same status as the off
17、icial versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Sl
18、ovakia, Slovenia, Spain, Sweden, Switzerland, and United Kingdom. C:2002 + 2Contents Page Foreword to EN ISO 14125:19983 !Foreword to EN ISO 14125:1998/A1:2011 .3 Introduction .4 1 Scope.5 2 Normative references.6 3 Principle 6 4 Definitions.7 5 Apparatus8 6 Test specimens.10 7 Number of test specim
19、ens 12 8 Conditioning .12 9 Procedure12 10 Calculation and expression of results .13 11 Precision .16 12 Test report.17 Annex A (normative) Other test specimens 18 Annex B (normative) Large-deflection corrections Calculation and expression of results 19 Annex ZA (no mative) Normative references to i
20、nternational publications with their relevant European publications 23 DIN EN ISO 14125:2011-05 rEN ISO 14125:1998 + A C :2002 + A1:2011 (E)3 Foreword to EN ISO 14125:1998 This document (EN ISO 14125:1998) has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical
21、Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. This standard supersedes EN 63:1977. This European Standard EN ISO 14125:1998 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 1998, and
22、conflicting national standards shall be withdrawn at the latest by September 1998. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark, Finland, Fra
23、nce, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Endorsement notice The text of ISO 14125:1998 has been approved by CEN as EN ISO 14125:1998 without any modification. NOTE Normative references to International St
24、andards are given in Annex ZA (normative). !Foreword to EN ISO 14125:1998/A1:2011 This document (EN ISO 14125:1998/A1:2011) has been prepared by Technical Committee ISO/TC 61 “Plastics” in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by NBN. This Amen
25、dment to the European Standard EN ISO 14125:1998 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by August 2011, and conflicting national standards shall be withdrawn at the latest by August 2011. Attention is drawn to the
26、 possibility that some of the elements of this document may be the subject of patent rights. CEN and/or CENELEC shall not be held responsible for identifying any or all such patent rights. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countr
27、ies are bound to implement this European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Sloven
28、ia, Spain, Sweden, Switzerland and the United Kingdom. Endorsement notice The text of ISO 14125:1998/Amd 1:2011 has been approved by CEN as EN ISO 14125:1998/A1:2011 without any modification.“ DIN EN ISO 14125:2011-05 EN ISO 14125:1998 + A C :2002 + A1:2011 (E)IntroductionThis standard is based on I
29、SO 178 but deals with fibre-reinforced plasticcomposites. As such it retains the test conditions relevant for glass-fibre-reinforced systems. The test conditions are extended from ISO 178 toinclude both three-point (Method A) and four-point (Method B) loadinggeometries, and to include conditions for
30、 composites based on newerfibres such as carbon and aramid fibres.Other source documents consulted include ASTM D 790 (four-pointloading), prEN 2562 (test conditions), CRAG 200 and JIS K 7074 (use ofshims for four-point loading, figure 6). The overall specimen length for four-point loading is the sa
31、me as for three-point loading.The scope of ISO 178 will be revised and limited to unreinforced and filledplastics.EN 63:1977, Glass-reinforced plastics Determination of flexuralproperties Three-point test, will be withdrawn.4 DIN EN ISO 14125:2011-05 EN ISO 14125:1998 + A C :2002 + A1:2011 (E)1 Scop
32、e1.1 This International Standard specifies a method for determining the flexural properties of fibre-reinforced plastic composites under three-point (Method A) and four-point (Method B) loading. Standardtest specimens are defined but parameters included for alternative specimen sizes for use whereap
33、propriate. A range of test speeds is included.1.2 The method is not suitable for the determination of design parameters, but may be used forscreening materials, or as a quality-control test.NOTE For example, the flexural modulus is only an appropriate value of the tensile Youngsmodulus of elasticity
34、 as the test is not for the additional deflection due to the shear stress whichleads to a lower value of the flexural modulus but uses test span/specimen thickness ratios thatminimise this effect. Differences between tensile and flexural properties are also caused by thematerial structure/lay-up.1.3
35、 The method is suitable for fibre-reinforced thermoplastic and thermosetting plastic composites.1.4 The method is performed using specimens which may be moulded to the chosen dimensions,machined from the central portion of the standard multi-purpose test specimen (see ISO 3167) ormachined from semi-
36、finished or finished products such as mouldings or laminates.1.5 The method specifies preferred dimensions for the specimen. Tests which are carried out onspecimens of other dimensions, or on specimens which are prepared under different conditions, mayproduce results which are not comparable. Other
37、factors, such as the speed of testing and theconditioning of the specimens can influence the results. For materials which are not homogeneousthrough the section, or above the linear-elastic response region, the result applies only to the thicknessand structure tested. Consequently, when comparative
38、data are required, these factors must becarefully controlled and recorded.5 DIN EN ISO 14125:2011-05 “ISO 178, Plastics Determination of flexural properties, applies to bulk compounds having fibres shorter than 7,5 mm. This is generally the case with materials intended for injection moulding.” EN IS
39、O 14125:1998 + A C :2002 + A1:2011 (E)3 PrincipleThe test specimen, supported as a beam, is deflected at a constant rate until the specimen fractures oruntil the deformation reaches some pre-determined value. During this procedure, the force applied tothe specimen and the deflection are measured.The
40、 method is used to investigate the flexural behaviour of the test specimens and for determining theflexural strength, flexural modulus and other aspects of the flexural stress/strain relationship under theconditions defined. It applies to a freely supported beam, loaded in three- or four-point flexu
41、re. The testgeometry is chosen to limit shear deformation and to avoid an interlaminar shear failure.NOTE The four-point loading geometry provides a constant bending moment between thecentral loading members. The compressive contact stresses due to the two central loadingmembers are lower in compari
42、son with the stresses induced under the single loading member ofthe three-point test. The four-point geometry is chosen so that the centre span equals one-third ofthe outer span. The distance between the outer support points is the same as in the equivalentthree-point loading case, therefore the sam
43、e specimen can be used.2 Normative references The following referenced documents are essential indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) ap
44、plies. ISO 178!Deleted text“, Plastics Determination of flexural properties ISO 291!Deleted text“, Plastics Standard atmospheres for conditioning and testing ISO 293!Deleted text“, Plastics Compression moulding of test specimens of thermoplastic materials ISO 294-1!Deleted text“, Plastics Injection
45、moulding of test specimens of thermoplastic materials Part 1: General principles, and moulding of multipurpose and bar test specimens ISO 295!Deleted text“, Plastics Compression moulding of test specimens of thermosetting materials !ISO 1268 (all parts), Fibre-reinforced plastics Methods of producin
46、g test plates“ ISO 2602!Deleted text“, Statistical interpretation of test results Estimation of the mean Confidence interval ISO 2818!Deleted text“, Plastics Preparation of test specimens by machining ISO 3167!Deleted text“, Plastics Multipurpose test specimens !ISO 5893, Rubber and plastics test eq
47、uipment Tensile, flexural and compression types (constant rate of traverse) Specification“ 6 DIN EN ISO 14125:2011-05 EN ISO 14125:1998 + A C :2002 + A1:2011 (E)4 DefinitionsFor the purpose of this International Standard, the following definitions apply:4.1 speed of testing, vThe rate of relative mo
48、vement between the supports and the loading member(s), expressed inmillimetres per minute (mm/min).4.2 flexural stress, fThe nominal stress in the outer surface of the test specimen at mid-span. It is calculated according tothe relationship given in clause 10, equation (3) or (8), and is expressed i
49、n megapascals (MPa).4.3 flexural stress at break (rupture), fBThe flexural stress at break (or rupture) of the test specimen (see figure 1, curves A and B). It isexpressed in megapascals (MPa).4.4 flexural strength, fMThe flexural stress sustained by the test specimen at the maximum load (see figure 1) for acceptablefailure modes (see subclause 9.9 and figure 6). It is expressed in megapascals (MPa).4.5 deflection, sThe distance through which the top or bottom surface of the t
