1、BRITISH STANDARDBS EN ISO 899-2:2003Incorporating Corrigendum No. 1Plastics Determination of creep behaviour Part 2: Flexural creep by three-point loadingICS 83.080.01g49g50g3g38g50g51g60g44g49g42g3g58g44g55g43g50g56g55g3g37g54g44g3g51g40g53g48g44g54g54g44g50g49g3g40g59g38g40g51g55g3g36g54g3g51g40g5
2、3g48g44g55g55g40g39g3g37g60g3g38g50g51g60g53g44g42g43g55g3g47g36g58+A1:2015National forewordThis British Standard is the UK implementation of EN ISO 899-2:2003+A1:2015. It is identical to ISO 899-2:2003 incorporating amendment 1:2015. It supersedes BS EN ISO 899-2:2003 which is withdrawn.The start a
3、nd finish of text introduced or altered by amendment is indicated in the text by tags. Tags indicating changes to ISO text carry the number of the ISO amendment. For example, text altered by ISO amendment 1 is indicated by !“.The UK participation in its preparation was entrusted to Technical Committ
4、ee PRI/21, Testing of plastics.A list of organizations represented on this committee can be obtained on request to its secretary.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 Standa
5、rd cannot confer immunity from legal obligations.BS EN ISO 899-2:2003+A1:2015This British Standardwas published underthe authority of theStandards Policy andStrategy Committee on18 June 2003 The British Standards Institution 2015. Published by BSI Standards Limited 2015Amendments/corrigenda issued s
6、ince publicationDate Comments 29 July 2003 Replacing the EN ISO foreword page andincorporating the Annex ZA page31 May 2015 Implementation of ISO amendment 1:2015 with CEN endorsement A1:2015ISBN 978 0 580 77080 7EUROPEAN STANDARDNORME EUROPENNEEUROPISCHE NORMEN ISO 899-2:2003+A1ICS 83.080.01English
7、 versionPlastics - Determination of creep behaviour - Part 2: Flexuralcreep by three-point loading (ISO 899-2:2003)Plastiques - Dtermination du comportement au fluage -Partie 2: Fluage en flexion par mise en charge en troispoints (ISO 899-2:2003)Kunststoffe - Bestimmung des Kriechverhaltens - Teil 2
8、:Zeitstand-Biegeversuch bei Dreipunkt-Belastung (ISO 899-2:2003)This European Standard was approved by CEN on 23 May 2003.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard withou
9、t any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by
10、 translationunder the responsibility of a CEN member into its own language and notified to the Management Centre has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,Hungary, Iceland,
11、Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and UnitedKingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNGManagement Centre: rue de Stassart, 36 B-1050 Brussels 2003 CEN All rights of exp
12、loitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN ISO 899-2:2003 EMarch 2015CORRECTED 2003-07-16ForewordThis document (EN ISO 899-2:2003) has been prepared by Technical Committee ISO/TC 61 “Plastics“ incollaboration with Technical Committee CEN/TC 249 “Pla
13、stics“, the secretariat of which is held by IBN.This European Standard shall be given the status of a national standard, either by publication of an identicaltext or by endorsement, at the latest by December 2003, and conflicting national standards shall be withdrawnat the latest by December 2003.Th
14、is document supersedes EN ISO 899-2:1996.According to the CEN/CENELEC Internal Regulations, the national standards organizations of the followingcountries are bound to implement this European Standard: Austria, Belgium, Czech Republic, Denmark,Finland, France, Germany, Greece, Hungary, Iceland, Irel
15、and, Italy, Luxembourg, Malta, Netherlands, Norway,Portugal, Slovakia, Spain, Sweden, Switzerland and the United Kingdom.Endorsement noticeThe text of ISO 899-2:2003 has been approved by CEN as EN ISO 899-2:2003 without any modifications.NOTE Normative references to International Standards are liste
16、d in Annex ZA (normative).Foreword to amendment 1 This document (EN ISO 899-1:2003/A1:2015) 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 Amendment to the European Standard E
17、N ISO 899:2003 shall be given the status of a national standard, either by publication of an identical text or by endorsement, at the latest by September 2015, and conflicting national standards shall be withdrawn at the latest by September 2015. Attention is drawn to the possibility that some of th
18、e 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 countries are bound to implement t
19、his European Standard: Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slova
20、kia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 899-2:2003/Amd 1:2015 has been approved by CEN as EN ISO 899-2:2003/A1:2015 without any modification. BS EN ISO 899-2:2003+A1:2015 EN ISO 899-2:2003+A1:2015Reference numberISO 899-2:2003(E)IN
21、TERNATIONAL STANDARD ISO899-2Second edition2003-06-01Plastics Determination of creep behaviour Part 2: Flexural creep by three-point loading Plastiques Dtermination du comportement au fluage Partie 2: Fluage en flexion par mise en charge en trois points DPlcsid Fremia ihTs PDF file mya ctnoian emdeb
22、t dedyfepcaes. In ccacnadrow eitA hebods licnesilop gnic,y tihs file mirp eb yatnde iv roweb detu .g In crteirata caceptl on siibality in this .aera Ai ebods a tedarmfo kra Aebod SystemI snctaropro.de teDials fo teh sfotwcudorp erats sut deo crtaee tihs PDF file cna f ebi dnuon tlareneG eh Ifnler oa
23、tit evt oeh file; tP ehDc-Frtaeino marapterew stpo ereimizde fro irptni.gn Evyre cera neeb sah takne tsne oeru taht teh file is siutlbae fosu re yb ISO memdob rebeis. In tlnu ehikletneve y ttah lborp aem lertait gno it is f,dnuo plsaee ifnrom ttneC ehlar Secterirata ta teh serddaig sleb nevwo. ISO 3
24、002 All irthgs erse.devr lnUeto sswrehise specified, on trap fo this lbupictaion maeb y cudorperro de tuilizi den yna form ro na ybm ynae,s lecetrinoc ro mceinahcla, incliduntohp gcoiypodna gn micrfoilm, wittuoh repmissii now nritign from ietI rehSa Ot tsserdda eh ebolw or ISOs memreb i ydobn the cn
25、uotfo yr ttseuqer ehe.r ISO cirypothg fofice saCe tsopale 65 eneG 1121-HC 02 avleT. 4 + 10 947 22 1 11 xaF0 947 22 14 + 9 74 E-mial coirypthgis.o groWe bwww.is.o groiiBS EN ISO 899-2:2003+A1:2015 ISO 899-2:2003+A1:2015ISO 899-2:2003(E) I SO 3002 All irhgts seredevr iiiContents Page Foreword iv 1 Sco
26、pe 1 2 Normative references . 1 3 Terms and definitions. 2 4 Apparatus. 3 5 Test specimens . 4 6 Procedure. 4 7 Expression of results 6 8 Test report 9 Annex A (informative) Physical-ageing effects on the creep of polymers . 10 Bibliography . 14 iiiBS EN ISO 899-2:2003+A1:2015 ISO 899-2:2003+A1:2015
27、ISO 899-2:2003(E) vi I SO 3002 All irhgts seredevrForeword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each
28、 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, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the Internationa
29、l Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards
30、 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. Attention is drawn to the possibility that some of the elements of this document may be the subject of
31、 patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO 899-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties. This second edition cancels and replaces the first edition (ISO 899-2:1993), which has been te
32、chnically revised. ISO 899 consists of the following parts, under the general title Plastics Determination of creep behaviour : Part 1: Tensile creep Part 2: Flexural creep by three-point loading ivBS EN ISO 899-2:2003+A1:2015 ISO 899-2:2003+A1:2015INTENRATIONAL TSANDADR IS-998 O2:(3002E)I SO 3002 A
33、ll irhgts seredevr 1Plastics Determination of creep behaviour Part 2: Flexural creep by three-point loading 1 Scope 1.1 This part of ISO 899 specifies a method for determining the flexural creep of plastics in the form of standard test specimens under specified conditions such as those of pretreatme
34、nt, temperature and humidity. It applies only to a simple freely supported beam loaded at mid-span (three-point-loading test). 1.2 The method is suitable for use with rigid and semi-rigid non-reinforced, filled and fibre-reinforced plastics materials (see ISO 472 for definitions) in the form of dumb
35、-bell-shaped test specimens moulded directly or machined from sheets or moulded articles. NOTE The method may be unsuitable for certain fibre-reinforced materials due to differences in fibre orientation. 1.3 The method is intended to provide data for engineering-design and research and development p
36、urposes. Data for engineering-design purposes requires the use of extensometers to measure the gauge length of the specimen. Data for research or quality-control purposes may use the change in distance between the grips (nominal extension). 1.4 Flexural creep may vary significantly with differences
37、in specimen preparation and dimensions and in the test environment. The thermal history of the test specimen can also have profound effects on its creep behaviour (see Annex A). Consequently, when precise comparative results are required, these factors must be carefully controlled. 1.5 If flexural-c
38、reep properties are to be used for engineering-design purposes, the plastics materials should be tested over a broad range of stresses, times and environmental conditions. 1.6 The method may not be suitable for determining the flexural creep of rigid cellular plastics (attention is drawn in this res
39、pect to ISO 1209-1, Cellular plastics, rigid Flexural tests Part 1: Bending test, and ISO 1209-2, Cellular plastics, rigid Flexural tests Part 2: Determination of flexural properties). 2 Normative references The following referenced documents are indispensable for the application of this document. F
40、or dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. ISO 62:1999, Plastics Determination of water absorption ISO 178:2001, Plastics Determination of flexural properties ISO 291:1997, Plastics St
41、andard atmospheres for conditioning and testing ISO 472:1999, Plastics Vocabulary 1BS EN ISO 899-2:2003+A1:2015 ISO 899-2:2003+A1:2015ISO 899-2:2003(E) 2 I SO 3002 All irhgts seredevr3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 472 and the followi
42、ng apply. 3.1 creep increase in strain with time when a constant force is applied 3.2 flexural stress surface stress in the mid-span section of the test specimen NOTE It is calculated from the relationship given in 7.1.2. 3.3 deflection stdistance over which the top or bottom surface of the test spe
43、cimen at mid-span deviates from its original position during flexure NOTE It is expressed in millimetres. 3.4 flexural-creep strain tstrain at the surface of the test specimen produced by a stress at any given time t during a creep test, calculated in accordance with 7.1.3 NOTE It is expressed as a
44、dimensionless ratio or as a percentage. 3.5 flexural-creep modulus Etratio of flexural stress to flexural-creep strain, calculated as in 7.1.1 3.6 isochronous stress-strain curve Cartesian plot of stress versus creep strain, at a specific time after application of the test load 3.7 time to rupture p
45、eriod of time the specimen is under full load until rupture 3.8 creep-strength limit initial stress which will just cause rupture (B,t) or will produce a specified strain (,t) at a specified time t, at a given temperature and relative humidity 3.9 initial distance between specimen supports span L in
46、itial distance between lines of contact between test specimen and supports (see Figure 1) 2BS EN ISO 899-2:2003+A1:2015 ISO 899-2:2003+A1:2015I SO 3002 All irhgts seredevr 34 Apparatus 4.1 Test rack, comprising a rigid frame with two supports, one for each end of the test specimen, the distance betw
47、een the supports being adjustable to (16 1) times the thickness (height) of the specimen (see Figure 1) for normal specimens, or to greater than 17 times the thickness (height) of the specimen or a fixed distance (100 mm) for rigid unidirectional-fibre-reinforced test specimens (see 6.2). The test r
48、ack shall be levelled, and sufficient space shall be allowed below the specimen for the specimen to flex under constant loading at mid-span. Key 1 applied force, F 2 loading edge 3 test specimen 4 support Figure 1 Characteristics of flexural-creep apparatus The radius R1of the loading edge and the r
49、adius R2of the supports shall conform to the values given in Table 1. Table 1 Values in millimetres Thickness of test specimen Radius of loading edge R1Radius of supports R2u 3 3 5 0,1 5 0,1 2 0,2 5 0,2 4.2 Loading system, capable of ensuring that the load is applied smoothly, without causing transient overloading, and that the load is maintained to within 1 % of the desired load. In creep-to-rupture tests, provision shall be made to prevent any shocks which occur at the moment of rupture being transmi
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