EN ISO 179-2:2020

Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test (ISO 179-2:2020)

1.1  This document specifies a method for determining Charpy impact properties of plastics from force-deflection diagrams. Different types of rod-shaped test specimens and test configurations, as well as test parameters depending on the type of material, the type of test specimen and the type of notch, are defined in ISO 179-1.
Dynamic effects such as load-cell/striker resonance, test specimen resonance and initial-contact/inertia peaks are described in this document (see Figure 1, Curve b, and Annex A).
1.2  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 13802:2015, Annex E). This document is used to record a force-deflection or force-time diagram for detailed characterization of the impact behaviour, and for developing automatic apparatus, i.e. avoiding the need to match energy.
The method described in this document is also suitable for:
—     acquiring more and different materials characteristics under impact conditions;
—     supervising the Charpy test procedure, as this instrumentation allows detection of typical operational mistakes, such as the specimen not being in close contact with the supports;
—     automatically detecting the type of break;
—     pendulum type instruments to avoid frequent changes of pendulum hammers;
—     measuring fracture mechanical properties described in other ISO standards.
1.3  For the range of materials which can be tested by this method, see ISO 179-1:2010, Clause 1.
1.4  For the general comparability of test results, see ISO 179-1:2010, Clause 1.
1.5  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 document 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 obtained with this method are comparable only if the conditions of test specimen preparation, as well as the test conditions, are the same. The impact behaviour of finished products cannot, therefore, be predicted directly from this test.

Kunststoffe - Bestimmung der Charpy-Schlageigenschaften - Teil 2: Instrumentierte Schlagzähigkeitsprüfung (ISO 179-2:2020)

1.1 Dieses Dokument legt ein Verfahren zur Bestimmung der Charpy-Schlageigenschaften von Kunststoffen aus Kraft-Durchbiegungs-Diagrammen fest. In ISO 179 1 werden verschiedene Arten stabförmiger Probekörper und Prüfkonfigurationen sowie Prüfparameter in Abhängigkeit vom Werkstofftyp, Probekörpertyp und von der Kerbart festgelegt.
Dynamische Effekte, wie z. B. Resonanzen des Systems Kraftsensor/Hammerfinne, Resonanzen im Probekörper und des ersten Anschlags werden in diesem Dokument beschrieben (siehe Bild 1, Kurve b und Anhang A).
1.2 ISO 179 1 ist nur für die Charakterisierung des Schlagverhaltens durch die Schlagzähigkeit und für die Verwendung einer Prüfeinrichtung geeignet, deren potentielle Energie etwa der zu messenden Energie bis Bruch angepasst ist (siehe ISO 13802:2015, Anhang E). Dieses Dokument wird angewendet, um ein Kraft-Durchbiegungs- oder Kraft-Zeit-Diagramm für die weitergehende Charakterisierung des Schlagverhaltens aufzuzeichnen, sowie bei der Entwicklung einer automatisierten Prüfeinrichtung, bei der die Notwendigkeit der Energieanpassung vermieden werden kann.
Das in diesem Dokument beschriebene Verfahren ist auch für Folgendes geeignet:
- Ermitteln von mehr und unterschiedlichen Werkstoffeigenschaften unter Schlagbedingungen;
- Überwachen des Prüfablaufs nach Charpy, weil dieses Prüfgerät den Nachweis typischer Bedienungsfehler ermöglicht, z. B. dass der Probekörper nicht eng an den Widerlagern anliegt;
- die automatische Brucharterkennung;
- bei Pendelschlagwerken Vermeiden des häufigen Wechsels der Pendelhammer;
- Messen bruchmechanischer Eigenschaften, die in anderen ISO-Normen beschrieben sind.
1.3 Werkstoffe, die nach diesem Verfahren geprüft werden können, sind in ISO 179 1:2010, Abschnitt 1 aufgeführt.
1.4 ISO 179 1:2010, Abschnitt 1, gibt allgemeine Hinweise zur Vergleichbarkeit der Prüfergebnisse.
1.5 Informationen zum spezifischen Verhalten von Werkstoffen können durch Prüfung bei verschiedenen Prüftemperaturen, durch Änderung des Kerbgrundradius und/oder der Probekörperdicke und durch Prüfung von Probekörpern, die unter verschiedenen Bedingungen hergestellt wurden, erhalten werden.
Das Ziel dieses Dokuments ist es nicht, eine Beurteilung der auftretenden Mechanismen an jedem Punkt im Kraft-Weg-Diagramm zu geben. Das ist Aufgabe der wissenschaftlichen Forschung.
1.6 Die mit diesem Verfahren erzielten Prüfergebnisse sind nur dann vergleichbar, wenn die Bedingungen der Probekörperherstellung sowie die Prüfbedingungen gleich sind. Das Schlagverhalten von Fertigteilen kann daher aus diesen Prüfverfahren nicht direkt vorhergesagt werden.

Plastiques - Détermination des caractéristiques au choc Charpy - Partie 2: Essai de choc instrumenté (ISO 179-2:2020)

1.1    Le présent document spécifie une méthode pour la détermination des propriétés des plastiques au choc Charpy à partir de diagrammes force/flèche. L'ISO 179-1 définit différents types d'éprouvettes en forme de barreau, diverses configurations d'essai, ainsi que les paramètres d'essai à adopter suivant le type de matériau, d'éprouvette et d'entaille.
En outre, le présent document décrit les effets dynamiques, tels que la résonance de la cellule de charge/du percuteur, la résonance de l'éprouvette et les pics d'inertie au contact initial (voir la Figure 1, courbe b, et l'Annexe A).
1.2    L'ISO 179-1 est utilisable pour caractériser le comportement au choc, mais uniquement à partir de la résistance au choc et avec un appareil dont l'énergie potentielle est adaptée à l'énergie particulière à la rupture à mesurer (voir l'ISO 13802:2015, Annexe E). Le présent document est utilisé pour enregistrer un diagramme force/flèche ou force/temps pour caractériser le comportement au choc et pour mettre au point un appareillage automatique, c'est-à-dire un appareillage qui évite l'ajustement des énergies.
La méthode décrite dans le présent document convient également pour:
—          acquérir davantage de caractéristiques et des caractéristiques de matériaux différents dans des conditions de choc;
—          superviser le mode opératoire d'essai Charpy, car ces instruments permettent la détection d'erreurs opérationnelles type, par exemple lorsque l'éprouvette n'est pas en contact étroit avec les supports;
—          détecter automatiquement le type de rupture;
—          les instruments de type à pendule pour éviter des changements fréquents de marteaux;
—          mesurer les propriétés mécaniques de rupture décrites dans d'autres normes ISO.
1.3    En ce qui concerne l'éventail des matériaux pouvant être soumis à l'essai au moyen de la présente méthode, voir l'ISO 179-1:2010, Article 1.
1.4    En ce qui concerne la comparabilité générale des résultats d'essai, voir l'ISO 179-1:2010, Article 1.
1.5    Des informations relatives au comportement caractéristique des matériaux peuvent être obtenues en conduisant les essais à différentes températures, en faisant varier le rayon de l'entaille et/ou l'épaisseur de l'éprouvette et en soumettant à l'essai des éprouvettes ayant été préparées dans différentes conditions.
Le présent document n'a pas pour but de donner une explication du mécanisme qui intervient à chaque point particulier du diagramme force/flèche. Ces explications sont étudiées dans le cadre des recherches scientifiques actuellement en cours.
1.6    Les résultats d'essai obtenus avec cette méthode ne sont comparables qui si les conditions de préparation des éprouvettes et les conditions d'essai retenues sont les mêmes. De ce fait, le comportement au choc des produits finis ne peut pas être directement déduit de l'essai.

Polimerni materiali - Določanje udarne žilavosti po Charpyju - 2. del: Preskus udarne žilavosti z instrumentalnim prikazom (ISO 179-2:2020)

General Information

• Status: Published
• Publication Date: 02-Jun-2020
• Withdrawal Date: 30-Dec-2020
• ICS: 83.080.01 - Plastics in general
• Technical Committee: CEN/TC 249 - Plastics
• Drafting Committee: CEN/TC 249 - Plastics
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 03-Jun-2020
• Completion Date: 03-Jun-2020
• Ref Project: SIST EN ISO 179-2:2020 - Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test (ISO 179-2:2020)

Relations

• Replaces: EN ISO 179-2:1999/A1:2012 - Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test - Amendment 1: Precision data (ISO 179-2:1997/Amd 1:2011)
• Effective Date: 10-Jun-2020
• Replaces: EN ISO 179-2:1999 - Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test (ISO 179-2:1997)
• Effective Date: 23-May-2018

Standards Content (Sample)

SLOVENSKI STANDARD
01-september-2020
Nadomešča:
SIST EN ISO 179-2:2000
SIST EN ISO 179-2:2000/A1:2014
Polimerni materiali - Določanje udarne žilavosti po Charpyju - 2. del: Preskus
udarne žilavosti z instrumentalnim prikazom (ISO 179-2:2020)
Plastics - Determination of Charpy impact properties - Part 2: Instrumented impact test
(ISO 179-2:2020)
Kunststoffe - Bestimmung der Charpy-Schlageigenschaften - Teil 2: Instrumentierte
Schlagzähigkeitsprüfung (ISO 179-2:2020)
Plastiques - Détermination des caractéristiques au choc Charpy - Partie 2: Essai de choc
instrumenté (ISO 179-2:2020)
Ta slovenski standard je istoveten z: EN ISO 179-2:2020
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN ISO 179-2
EUROPEAN STANDARD
NORME EUROPÉENNE
June 2020
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 179-2:1999
English Version
Plastics - Determination of Charpy impact properties - Part
2: Instrumented impact test (ISO 179-2:2020)
Plastiques - Détermination des caractéristiques au choc Kunststoffe - Bestimmung der Charpy-
Charpy - Partie 2: Essai de choc instrumenté (ISO 179- Schlageigenschaften - Teil 2: Instrumentierte
2:2020) Schlagzähigkeitsprüfung (ISO 179-2:2020)
This European Standard was approved by CEN on 10 May 2020.

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 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 responsibility 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, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2020 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 179-2:2020 E
worldwide for CEN national Members.

Contents Page
European foreword . 3

European foreword
This document (EN ISO 179-2:2020) 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 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 December 2020, and conflicting national standards
shall be withdrawn at the latest by December 2020.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN shall not be held responsible for identifying any or all such patent rights.
This document supersedes EN ISO 179-2:1999.
According to the CEN-CENELEC Internal Regulations, the national standards organizations of the
following 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, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and the
United Kingdom.
Endorsement notice
The text of ISO 179-2:2020 has been approved by CEN as EN ISO 179-2:2020 without any modification.

INTERNATIONAL ISO
STANDARD 179-2
Second edition
2020-05
Plastics — Determination of Charpy
impact properties —
Part 2:
Instrumented impact test
Plastiques — Détermination des caractéristiques au choc Charpy —
Partie 2: Essai de choc instrumenté
Reference number
ISO 179-2:2020(E)
©
ISO 2020
ISO 179-2:2020(E)
© ISO 2020
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting
on the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address
below or ISO’s member body in the country of the requester.
ISO copyright office
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CH-1214 Vernier, Geneva
Phone: [phone]
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Website: www.iso.org
Published in Switzerland
ii © ISO 2020 – All rights reserved

ISO 179-2:2020(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 2
3 Terms and definitions . 2
4 Principle . 7
5 Apparatus . 7
6 Test specimens.11
7 Procedure.11
8 Calculation and expression of results .12
8.1 General .12
8.2 Calculation of deflection .12
8.3 Calculation of energy .13
8.4 Calculation of impact strength .14
8.4.1 Unnotched test specimens.14
8.4.2 Notched test specimens .14
8.5 Statistical parameters .15
8.6 Number of significant figures .15
9 Precision .15
10 Test report .15
Annex A (informative) Inertial peak .17
Annex B (informative) Mass of frame .20
Annex C (informative) Precision data .21
Bibliography .23
ISO 179-2:2020(E)
Foreword
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 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 International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO documents should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www .iso .org/ directives).
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. ISO shall not be held responsible for identifying any or all such patent rights. Details of
any patent rights identified during the development of the document will be in the Introduction and/or
on the ISO list of patent declarations received (see www .iso .org/ patents).
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation on the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to the
World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT) see the following
URL: www .iso .org/ iso/ foreword .html.
This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2,
Mechanical properties, in collaboration with the European Committee for Standardization (CEN)
Technical Committee CEN/TC 249, Plastics, in accordance with the Agreement on technical cooperation
between ISO and CEN (Vienna Agreement).
This second edition cancels and replaces the first edition (ISO 179-2:1997), which has been technically
revised. It also incorporates the Technical Corrigendum ISO 179-2:1997/Cor 1:1998 and the Amendment
ISO 179-2:1997/Amd 1:2011.
The main changes compared to the previous edition are as follows:
— references to ISO 13802:2015 have been updated;
— force calibration requirements have been clarified;
— a new subclause for the determination of test speed when using falling mass instruments has been
added (see 5.1.6).
A list of all parts of the ISO 179 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www .iso .org/ members .html.
iv © ISO 2020 – All rights reserved

INTERNATIONAL STANDARD ISO 179-2:2020(E)
Plastics — Determination of Charpy impact properties —
Part 2:
Instrumented impact test
1 Scope
1.1 This document specifies a method for determining Charpy impact properties of plastics from
force-deflection diagrams. Different types of rod-shaped test specimens and test configurations, as well
as test parameters depending on the type of material, the type of test specimen and the type of notch, are
defined in ISO 179-1.
Dynamic effects such as load-cell/striker resonance, test specimen resonance and initial-contact/
inertia peaks are described in this document (see Figure 1, Curve b, and Annex A).
1.2 ISO 179-1 is suitable for characterizing the impact behaviour by the impact strength only and for
using apparatus whose potential energy is matched approxi
...