1、June 2012 Translation by DIN-Sprachendienst.English price group 13No 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 8
2、3.080.01!$|s=“1898026www.din.deDDIN EN ISO 179-2Plastics Determination of Charpy impact properties Part 2: Instrumented impact test (ISO 179-2:1997 + Amd.1:2011)(includes Amendment A1:2012)English translation of DIN EN ISO 179-2:2012-06Kunststoffe Bestimmung der Charpy-Schlageigenschaften Teil 2: In
3、strumentierte Schlagzhigkeitsprfung (ISO 179-2:1997 + Amd.1:2011) nderung A1:2012)Englische bersetzung von DIN EN ISO 179-2:2012-06Plastiques Dtermination des caractristiques au choc Charpy Partie 2: Essai de choc instrument (ISO 179-2:1997 + Amd.1:2011) A1:2012 inclus)Traduction anglaise de DIN EN
4、ISO 179-2:2012-06SupersedesDIN EN ISO 179-2:2000-06www.beuth.deIn case of doubt, the German-language original shall be considered authoritative.Document comprises 24 pages(enthlt(Amendement05.12 DIN EN ISO 179-2:2012-06 2 A comma is used as the decimal marker. National foreword This standard has bee
5、n prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) in collaboration with Technical Committee CEN/TC 249 “Plastics” (Secretariat: NBN, Belgium). The responsible German body involved in its preparation was the Normenausschuss Kunststoffe
6、(Plastics Standards Committee), Working Committee NA 054-01-02 AA Mechanische Eigenschaften und Probe-krperherstellung. This document incorporates Amendment A1 which was approved by CEN on 9 March 2012. The start and finish of text introduced or altered by amendment is indicated in the text by tags
7、!“. The DIN Standards corresponding to the International Standards referred to in this document are as follows: ISO 179-1 DIN EN ISO 179-1 ISO 13802 DIN EN ISO 13802 Amendments This standard differs from DIN EN ISO 179-2:2000-06 as follows: a) in Clause 9 “Precision” reference is made to ISO 179-2 i
8、n Annex D instead of ISO 179-1; b) the informative Annex D “Precision data” has been included. Previous editions DIN EN ISO 179-2: 2000-06 National Annex NA (informative) Bibliography DIN EN ISO 179-1, Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact test DIN EN ISO
9、 13802, Plastics Verification of pendulum impact-testing machines Charpy, Izod and tensile impact-testing EUROPEAN STANDARD NORME EUROPENNE EUROPISCHE NORM EN ISO 179-2 June 1999 + A1 April 2012 ICS 83.080.01 English version Plastics Determination of Charpy impact properties Part 2: Instrumented imp
10、act test (ISO 179-2:1997 + Amd. 1:2011) Plastiques Dtermination des caractristiques au choc Charpy Partie 2: Essai de choc instrument (ISO 179-2:1997 + Amd. 1:2011) Kunststoffe Bestimmung der Charpy-Schlageigenschaften Teil 2: Instrumentierte Schlagzhigkeitsprfung (ISO 179-2:1997 + Amd. 1:2011EN ISO
11、 179-2 was approved by CEN on 1999-05-06 and Amendment A1 on 2012-03-09. 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 bibliogra
12、phical references concerning such national standards may be obtained on application to the CEN-CENELEC 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 translation under the responsibil
13、ity of a CEN member into its own language and notified to the CEN-CENELEC Management Centre has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece,
14、Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom. EUROPEAN COMMITTEE FOR STANDARDIZATION COMIT EUROPEN DE NORMALISATIONEUROPISCHES KOMITEE FR NORMUNG Manag
15、ement Centre: Avenue Marnix 17, B-1000 Brussels 2012 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN ISO 179-2:1999 + A1:2012 EDIN EN ISO 179-2:2012-06 2Contents Page Foreword to EN ISO 179-2:1999 3 Foreword to Amendment A1 .3 1 Sc
16、ope 4 2 Normative reference 5 3 Definitions 5 4 Principle 8 5 Apparatus .8 5.1 Test machine 8 5.2 Instruments for measuring force and deflection . 10 5.3 Micrometers and gauges . 11 6 Test specimens . 11 7 Procedure 12 8 Calculation and expression of results 12 8.1 General . 12 8.2 Calculation of de
17、flection 12 8.3 Calculation of energy . 13 8.4 Calculation of impact strength 14 8.5 Statistical parameters 14 8.6 Number of significant figures 14 9 Precision 14 10 Test report . 15 Annex A (informative) Inertial peak 16 Annex B (informative) Mass of frame . 19 Annex C (informative) Bibliography .
18、20 Annex D (informative) Precision data 21 EN ISO 179-2:1999 + A1:2012 (E) 3 Foreword to EN ISO 179-2:1999 International Standard ISO 179-2:1997 Plastics Determination of Charpy impact properties Part 2: Instrumented impact test, which was prepared by ISO/TC 61 “Plastics” of the International Organi
19、zation for Standardization, has been adopted by Technical Committee CEN/TC 249 “Plastics”, the Secretariat of which is held by IBN, as a European Standard. This European Standard shall be given the status of a national standard, either by publication of an identical text or by endorsement, and confl
20、icting national standards withdrawn, by December 1999 at the latest. In accordance with the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this European Standard: Austria, Belgium, the Czech Republic, Denmark, Finland, France,
21、 Germany, Greece, Iceland, Ireland, Italy, Luxembourg, the Netherlands, Norway, Portugal, Spain, Sweden, Switzerland, and the United Kingdom. Endorsement notice The text of the International Standard ISO 179-2:1997 was approved by CEN as a European Standard without any modification. !Foreword to Ame
22、ndment A1 The text of EN ISO 179-2:1997/Amd 1:2011 has been prepared by Technical Committee ISO/TC 61 “Plastics” of the International Organization for Standardization (ISO) and has been taken over as EN ISO 179-2:1999/A1:2012 to the European Standard by Technical Committee CEN/TC 249 “Plastics” the
23、secretariat of which is held by NBN. 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 October 2012, and conflicting national standards shall be withdrawn at the latest by October 2012. Attention is
24、 drawn to the 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 fol
25、lowing countries 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, Slo
26、vakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the United Kingdom. Endorsement notice The text of ISO 179-2:1997/Amd 1:2011 has been approved by CEN as EN ISO 179-2:1999/A1:2012 without any modification.“ DIN EN ISO 179-2:2012-06 EN ISO 179-2:1999 + A1:2012 (E) 1 Scope1.1 This part of ISO 1
27、79 specifies a method for determining Charpy impact properties of plastics from force-deflection diagrams. Different types of rod-shaped test specimen and test configuration, as well as test parametersdepending on the type of material, the type of test specimen and the type of notch are defined in p
28、art 1 of ISO 179.Dynamic effects such as load-cell/striker resonance, test specimen resonance and initial-contact/inertia peaks aredescribed (see figure 1, curve b, and annex A).1.2 For the comparison between Charpy and Izod test methods, see ISO 179-1, clause 1.ISO 179-1 is suitable for characteriz
29、ing the impact behaviour by the impact strength only and for using apparatuswhose potential energy is matched approximately to the particular energy to break to be measured (see ISO 13802,annex C). This part of ISO 179 is used if a force-deflection or force-time diagram is necessary for detailedchar
30、acterization of the impact behaviour, and for developing automatic apparatus, i.e. avoiding the need, mentionedabove, to match energy.1.3 For the range of materials which may be tested by this method, see ISO 179-1, clause 1.1.4 For the general comparability of test results, see ISO 179-1, clause 1.
31、1.5 The method may not be used as a source of data for design calculations on components. However, thepossible use of data is not the subject of this part of ISO 179. Any application of data obtained using this part ofISO 179 should be specified by a referring standard or agreed upon by the interest
32、ed parties.Information on the typical behaviour of materials can be obtained by testing at different temperatures, by varying thenotch radius and/or specimen thickness and by testing specimens prepared under different conditions.It is not the purpose of this part of ISO 179 to give an interpretation
33、 of the mechanism occurring at every point onthe force-deflection diagram. These interpretations are a task for on-going scientific research.1.6 The test results are comparable only if the conditions of test specimen preparation, as well as the testconditions, are the same. Comprehensive evaluation
34、of the reaction to impact stress requires that determinations bemade as a function of deformation rate and temperature for different material variables such as crystallinity andmoisture content. The impact behaviour of finished products cannot, therefore, be predicted directly from this test,but tes
35、t specimens may be taken from finished products for testing by this method.1.7 Impact strengths determined by this method may replace those determined using ISO 179-1 if comparabilityhas been established by previous tests.DIN EN ISO 179-2:2012-06 4EN ISO 179-2:1999 + A1:2012 (E) 2 Normative referenc
36、esThe following standards contain provisions which, through reference in this text, constitute provisions of this part ofISO 179. At the time of publication, the editions indicated were valid. All standards are subject to revision, andparties to agreements based on this part of ISO 179 are encourage
37、d to investigate the possibility of applying themost recent editions of the standards indicated below. Members of IEC and ISO maintain registers of currently validInternational Standards.ISO 179-1:1), Plastics Determination of Charpy impact properties Part 1: Non-instrumented impact test.ISO 13802:2
38、), Plastics Verification of pendulum impact-testing machines Charpy, Izod and tensile impacttesting.3 DefinitionsFor the purposes of this part of ISO 179, the definitions given in part 1 apply, together with the following:3.1 impact velocity, v0: The velocity of the striker relative to the test spec
39、imen supports at the moment of impact.It is expressed in metres per second (m/s).3.2 inertial peak: The first peak in a force-time or force-deflection diagram. It arises from the inertia of that part ofthe test specimen accelerated after the first contact with the striker (see figure 1, curve b, and
40、 annex A).3.3 impact force, F: The force exerted by the striking edge on the test specimen in the direction of impact.It is expressed in newtons (N).3.4 deflection, s: The displacement of the striker relative to the test specimen supports after impact, starting atfirst contact between striker and te
41、st specimen.It is expressed in millimetres (mm).3.5 impact energy, W: The energy expended in accelerating, deforming and breaking the test specimen duringthe deflection s.It is expressed in joules (J).It is measured by integrating the area under the force-deflection curve from the point of impact to
42、 the deflection s.3.6 maximum impact force, FM: The maximum value of the impact force in a force-time or force-deflectiondiagram (see figure 1).It is expressed in newtons (N).3.7 deflection at maximum impact force, sM: The deflection at which the maximum impact force FMoccurs (seefigure 1).It is exp
43、ressed in millimetres (mm)._1) To be published. (Revision of ISO 179:1993)2) To be published.DIN EN ISO 179-2:2012-06 5EN ISO 179-2:1999 + A1:2012 (E) Figure 1 Typical force-deflection (N and t) and force-time (b) curves(for the types of failure, see figure 2)6EN ISO 179-2:1999 + A1:2012 (E) DIN EN
44、ISO 179-2:2012-06 N = no break: yielding followed by plastic deformation up to the deflection limit sL;P = partial break: yielding followed by stable cracking, resulting in a force at the deflection limit sLwhich is greater than5 % of the maximum force;t = tough break: yielding followed by stable cr
45、acking, resulting in a force at the deflection limit sLwhich is less than orequal to 5 % of the maximum force;b = brittle break: yielding followed by unstable cracking;s = splintering break: unstable cracking followed by yielding;sL= deflection limit; beginning of pull-through.NOTE Due to the differ
46、ent modes of deformation, force-deformation curves obtained using this part of ISO 179 show features which aredifferent from those obtained using ISO 6603-2 1. In particular, the first damage event in instrumented puncture tests frequently appears as aslight sudden force decrease (crack initiation),
47、 followed by a gradual force increase. Force increases after crack initiation are never observed ininstrumented three-point-bending impact tests. Furthermore, inertial effects are not as pronounced in plate impact tests as they are in bendingimpacts tests (see annex A).Figure 2 Typical force-deflect
48、ion curves showing different failure modesfor type 1 specimens tested edgewise3.8 energy to maximum impact force, WM: The energy expended up to the deflection at maximum impact force.It is expressed in joules (J).3.9 deflection at break, sB: The deflection at which the impact force is reduced to less than or equal to 5 % of themaximum impact force FM(see figure 1).7EN ISO 179-2:1999 + A1:2012 (E) DIN EN ISO 179-2:2012-06 It is expressed in millimetres (mm).It is necessa
