EN ISO 179-2:1999
(Main)Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test (ISO 179-2:1997)
Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test (ISO 179-2:1997)
1.1 This part of ISO 179 specifies a method for determining Charpy impact properties of plastics from forcedeflection diagrams. Different types of rod-shaped test specimen and test configuration, as well as test parameters
depending on the type of material, the type of test specimen and the type of notch are defined in part 1 of ISO 179. Dynamic effects such as load-cell/striker resonance, test specimen resonance and initial-contact/inertia peaks are described (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 characterizing the impact behaviour by the impact strength only and for using apparatus whose 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 detailed characterization of the impact behaviour, and for developing automatic apparatus, i.e. avoiding the need, mentioned above, 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.
1.5 The method may not be used as a source of data for design calculations on components. However, the possible use of data is not the subject of this part of ISO 179. Any application of data obtained using this part of ISO 179 should be specified by a referring standard or agreed upon by the interested parties. Information on the typical behaviour of materials can be obtained by testing at different temperatures, by varying the notch 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 of the mechanism occurring at every point on the 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 test conditions, are the same. Comprehensive evaluation of the reaction to impact stress requires that determinations be
made as a function of deformation rate and temperature for different material variables such as crystallinity and moisture content. The impact behaviour of finished products cannot, therefore, be predicted directly from this test, but test 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 comparability has been established by previous tests.
Kunststoffe - Bestimmung der Charpy-Schlageigenschaften - Teil 2: Instrumentierte Schlagzähigkeitsprüfung (ISO 179-2:1997)
1.1 Dieser Teil von ISO 179 legt ein Verfahren zur Bestimmung der Charpy-Schlageigenschaften von Kunststoffen aus Kraft-Durchbiegungs-Diagrammen fest. In Teil 1 von ISO 179 werden verschiedene Arten stabförmiger Probekörper und Prüfkonfigurationen sowie Prüfparameter in Abhängigkeit vom Werkstofftyp, Probekörpertyp und Kerbart festgelegt. Dynamische Effekte, wie z.B. Resonanzen in der Kraftmeßkette, Resonanzen im Probekörper und Prellschwingungen werden beschrieben (siehe Bild 1, Kurve b und Anhang A).
Plastiques - Détermination des caractéristiques au choc Charpy - Partie 2: Essai de choc instrumenté (ISO 179-2:1997)
Polimerni materiali - Določanje udarne žilavosti po Charpyju - 2. del: Preskus udarne žilavosti z instrumentalnim prikazom (ISO 179-2:1997)
1.1 Ta del standarda ISO 179 navaja metodo določanja udarne žilavosti polimernih materialov po Charpyju na osnovi diagramov sila/deformacija. Različne vrste preskusnega vzorca v obliki palice, preskusne konfiguracije ter preskusnih parametrov
glede na vrsto materiala, vrsto preskusnega vzorca in vrsto zareze so določene v 1. delu standarda ISO 179. Opisani so dinamični učinki, kot so resonanca obremenitvene celice/udarnega kladiva, resonanca preskusnega vzorca in najvišje vrednosti začetnega stika/inercije (glej sliko 1, krivuljo b, dodatek A).
1.2 Za primerjavo preskusnih metod po Charpyju in Izodu glej točko 1 standarda ISO 179-1. ISO 179-1 je primeren za opis udarnega vedenja izključno glede na moč trka in uporabo aparata, katerega potencialna energija se približno ujema s količino energijo preloma, ki je predmet merjenja (glej ISO 13802, dodatek C) Ta del standarda ISO 179 se uporablja, če je diagram sila/deformacija ali sila/čas nujen za podroben opis udarnega vedenja in za razvoj samodejnega aparata, t.j. v izogib zgoraj omenjenemu ujemanju energije.
1.3 Za nabor materialov, ki se lahko preskušajo s to metodo, si glej točko 1 standarda ISO 179-1.
1.4 Za splošno primerjavo rezultatov preskusa glej točko 1 standarda ISO 179-1.
1.5 Metode se ne sme uporabljati kot vir podatkov za izračune v fazi zasnove komponent. Vendar možnost uporabe podatkov ni predmet tega dela standarda ISO 179. Vsaka uporaba podatkov, pridobljenih z uporabo tega dela standarda ISO 179, bi morala biti določena z referenčnim standardom ali dogovorjena med zainteresiranimi strankami. Podatke o značilnem vedenju materialov je mogoče pridobiti s preskušanjem pri različnih temperaturah, spreminjanjem premera zareze in/ali debeline vzorca ter preskušanjem vzorcev, pripravljenih pri različnih pogojih. Namen tega dela standarda ISO 179 ni razlaga mehanizma, ki deluje na vsaki točki diagrama sila-deformacija. Te razlage so naloga aktualnih znanstvenih raziskav.
1.6 Rezultati preskusa so primerljivi le v primeru, če so pogoji priprave preskusnih vzorcev in preskusni pogoji enaki. Celovito vrednotenje reakcije na udarec zahteva, da so ugotovitve
opravljene kot funkcija stopnje deformacije in temperature za različne spremenljivke materiala, kot sta kristaliničnost in vsebnost vlage. Udarnega vedenja končnih proizvodov zato ni mogoče napovedati neposredno s tem preskusom, ampak so preskusni vzorci za testiranje s to metodo lahko vzeti iz nabora končnih izdelkov.
1.7 Udarne moči, določene s to metodo, lahko zamenjajo tiste, ki so določene s standardom ISO 179-1, če smo s predhodnimi preskusi ugotovili, da so primerljive.
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Standards Content (Sample)
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kunststoffe - Bestimmung der Charpy-Schlageigenschaften - Teil 2: Instrumentierte Schlagzähigkeitsprüfung (ISO 179-2:1997)Plastiques - Détermination des caractéristiques au choc Charpy - Partie 2: Essai de choc instrumenté (ISO 179-2:1997)Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test (ISO 179-2:1997)83.080.01Polimerni materiali na splošnoPlastics in generalICS:Ta slovenski standard je istoveten z:EN ISO 179-2:1999SIST EN ISO 179-2:2000en01-maj-2000SIST EN ISO 179-2:2000SLOVENSKI
STANDARD
SIST EN ISO 179-2:2000
SIST EN ISO 179-2:2000
SIST EN ISO 179-2:2000
AReference numberISO 179-2:1997(E)INTERNATIONALSTANDARDISO179-2First edition1997-12-15Plastics — Determination of Charpy impactproperties —Part 2:Instrumented impact testPlastiques — Détermination des caractéristiques au choc Charpy —Partie 2: Essai de choc instrumentéSIST EN ISO 179-2:2000
ISO 179-2:1997(E)©
ISO 1997All rights reserved. Unless otherwise specified, no part of this publication may be reproducedor utilized in any form or by any means, electronic or mechanical, including photocopying andmicrofilm, without permission in writing from the publisher.International Organization for StandardizationCase postale 56 · CH-1211 Genève 20 · SwitzerlandInternetcentral@iso.chX.400c=ch; a=400net; p=iso; o=isocs; s=centralPrinted in SwitzerlandiiForewordISO (the International Organization for Standardization) is a worldwidefederation of national standards bodies (ISO member bodies). The work ofpreparing International Standards is normally carried out through ISOtechnical committees. Each member body interested in a subject for whicha technical committee has been established has the right to be representedon that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISOcollaborates closely with the International Electrotechnical Commission(IEC) on all matters of electrotechnical standardization.Draft International Standards adopted by the technical committees arecirculated to the member bodies for voting. Publication as an InternationalStandard requires approval by at least 75 % of the member bodies castinga vote.International Standard ISO 179-2 was prepared by Technical CommitteeISO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties.ISO 179 consists of the following parts, under the general title Plastics —Determination of Charpy impact properties:—Part 1: Non-instrumented impact test—Part 2: Instrumented impact testAnnexes A to C of this part of ISO 179 are for information only.SIST EN ISO 179-2:2000
INTERNATIONAL STANDARD
© ISOISO 179-2:1997(E)1Plastics — Determination of Charpy impact properties —Part 2:Instrumented impact test1
Scope1.1
This part of ISO 179 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 part 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 characterizing 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 detailedcharacterization 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 1.1.5
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 interested 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 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 of
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