SIST EN ISO 179-1:2010
(Main)Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented impact test (ISO 179-1:2010)
Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented impact test (ISO 179-1:2010)
1.1 This part of ISO 179 specifies a method for determining the Charpy impact strength of plastics under defined conditions. A number of different types of specimen and test configurations are defined. Different test parameters are specified according to the type of material, the type of test specimen and the type of notch.
1.2 The method can be used to investigate the behaviour of specified types of specimen under the impact conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent in the test conditions. It can also be used for the determination of comparative data from similar types of material.
1.3 The method has a greater range of applicability than that given in ISO 180[1] and is more suitable for the testing of materials showing interlaminar shear fracture or of materials exhibiting surface effects due to environmental factors.
1.4 The method is suitable for use with the following range of materials:
- rigid thermoplastic moulding and extrusion materials (including filled and reinforced compounds in addition to unfilled types) and rigid thermoplastics sheets;
- rigid thermosetting moulding materials (including filled and reinforced compounds) and rigid thermosetting sheets (including laminates);
- fibre-reinforced thermosetting and thermoplastic composites incorporating unidirectional or multidirectional reinforcements (such as mats, woven fabrics, woven rovings, chopped strands, combination and hybrid reinforcements, rovings and milled fibres) or incorporating sheets made from pre-impregnated materials (prepregs), including filled and reinforced compounds;
- thermotropic liquid-crystal polymers.
1.5 Notched samples are not normally suitable for use with rigid cellular materials, long-fibre-reinforced composites or thermotropic liquid-crystal polymers. In these cases, unnotched samples may be used.
1.6 The method is suited to the use of specimens moulded to the chosen dimensions, machined from the central portion of a standard multipurpose test specimen (see ISO 3167) or machined from finished or semifinished products such as mouldings, laminates and extruded or cast sheet.
1.7 The method specifies preferred dimensions for the test specimen. Tests which are carried out on specimens of different dimensions or with different notches, or specimens which are prepared under different conditions, might produce results which are not comparable. Other factors, such as the energy capacity of the apparatus, the impact velocity and the conditioning of the specimens can also influence the results. Consequently, when comparative data are required, these factors must be carefully controlled and recorded.
1.8 The method should not be used as a source of data for design calculations. Information on the typical behaviour of a material can be obtained, however, by testing at different temperatures, by varying the notch radius and/or the specimen thickness and by testing specimens prepared under different conditions.
Kunstststoffe - Bestimmung der Charpy-Schlageigenschaften - Teil 1: Nicht instrumentierte Schlagzähigkeitsprüfung (ISO 179-1:2010)
Dieser Teil von ISO 179 legt ein Verfahren für die Bestimmung der Charpy-Schlagzähigkeit von Kunststoffen
unter festgelegten Bedingungen fest. Eine Anzahl von unterschiedlichen Probekörpertypen und Prüfanordnungen
wird festgelegt. Unterschiedliche Prüfbedingungen werden entsprechend dem Werkstofftyp,
dem Probekörpertyp und der Kerbart festgelegt.
1.2 Das Prüfverfahren kann angewendet werden, um das Verhalten festgelegter Probekörpertypen bei den
festgelegten Schlagbedingungen zu untersuchen und die Sprödigkeit oder Zähigkeit von Probekörpern innerhalb
der Grenzen der Prüfbedingungen zu beurteilen. Es kann ebenfalls für die Bestimmung von Vergleichsdaten
von ähnlichen Werkstofftypen angewendet werden.
1.3 Das Verfahren hat einen breiteren Anwendungsbereich als das in ISO 180 [1] angegebene und ist
besser geeignet zur Prüfung von Werkstoffen, die interlaminare Scherbrüche zeigen, oder von Werkstoffen,
die Oberflächeneffekte aufgrund von Umgebungseinflüssen aufweisen.
1.4 Das Prüfverfahren ist zur Anwendung auf folgende Werkstoffgruppen geeignet:
steife thermoplastische Spritzguss- und Extrusionsformmassen (einschließlich gefüllter und verstärkter
Verbundwerkstoffe zusätzlich zu ungefüllten Typen) sowie Platten aus steifen Thermoplasten;
steife wärmehärtbare Formmassen (einschließlich gefüllter und verstärkter Verbundwerkstoffe) und
Platten aus steifen Duroplasten (einschließlich solcher aus Schichtstoffen);
faserverstärkte duroplastische und thermoplastische Verbundwerkstoffe mit unidirektionaler oder multidirektionaler
Verstärkung (wie Matten, Gewebe, Rovinggewebe, Kurzfasern, verbundene und Hybridverstärkungen,
Rovings und gemahlene Fasern) oder Verbundplatten aus vorimprägnierten Werkstoffen
(Prepregs), einschließlich gefüllter und verstärkter Verbundwerkstoffe;
thermotrope flüssigkristalline Polymere.
Plastiques - Détermination des caractéristiques au choc Charpy - Partie 1: Essai de choc non instrumenté (ISO 179-1:2010)
L'ISO 179-1:2010 spécifie une méthode de détermination de la résistance au choc Charpy des plastiques dans des conditions définies. De nombreux types différents d'éprouvettes et de configurations d'essai sont définis. Divers paramètres d'essai sont spécifiés selon le type de matériau, le type d'éprouvette et le type d'entaille.
La méthode peut être utilisée pour l'étude du comportement d'éprouvettes définies soumises à des conditions de choc déterminées et pour l'estimation de la fragilité ou de la ténacité des éprouvettes dans les limites inhérentes aux conditions d'essai. Elle peut également être utilisée pour déterminer des résultats comparatifs propres à des types similaires de matériaux.
Le domaine d'application de la méthode est plus étendu que celui de l'ISO 180 (essai de choc Izod) et il convient mieux à l'essai des matériaux qui présentent des défaillances de type cisaillement interlaminaire ou de ceux qui présentent des effets de surface dus à des facteurs d'environnement.
La méthode est applicable à la gamme des matériaux suivants:
matières thermoplastiques rigides pour moulage et extrusion (y compris les compositions chargées et renforcées en plus des types non chargés) et feuilles thermoplastiques rigides;
matières thermodurcissables rigides pour moulage (y compris les compositions chargées et renforcées) et feuilles thermodurcissables rigides (y compris les stratifiés);
composites thermoplastiques et thermodurcissables renforcés par des fibres comportant des renforts unidirectionnels ou multidirectionnels (tels que mats, tissus, tissus stratifils, fils de base coupés, combinaison de renforcements et hybrides, stratifils et fibres broyées) ou comportant des feuilles réalisées à partir de matières préimprégnées (prepregs), y compris les compositions chargées et renforcées;
polymères de cristaux liquides thermotropes.
Polimerni materiali - Ugotavljanje udarne žilavosti pa Charpyju - 1. del: Preskus udarne žilavosti z neinstrumentalno metodo (ISO 179-1:2010)
1.1 Ta del ISO 179 določa metodo za ugotavljanje udarne žilavosti polimernih materialov po Charpyju pod opredeljenimi pogoji. Opredeljene so številne različne vrste vzorcev in konfiguracij preskusa. Glede na vrsto materiala, vrsto vzorca in vrsto zareze so opredeljeni različni preskusni parametri.
1.2 Metoda se lahko uporablja za preiskovanje obnašanja določene vrste vzorca pod opredeljenimi udarnimi pogoji in za ocenjevanje krhkosti ali žilavosti vzorcev znotraj omejitev, ki veljajo v preskusnih pogojih. Lahko se uporablja tudi za ugotavljanje primerjalnih podatkov podobnih vrst materiala.
1.3 Metoda ima večji razpon uporabnosti kot metoda, navedena v ISO 180[1], in je primernejša za preskušanje materialov, na katerih se kaže medlaminarni strižni lom, ali materialov, na katerih se kažejo površinski učinki dejavnikov okolja
1.4 Metoda je primerna za uporabo pri naslednjih materialih:
- trdni plastomerni materiali za brizganje ali iztiskanje (vključno s polnjenimi in ojačanimi spojinami, poleg nepolnjenih vrst) in trdni plastomerni trakovi;
- trdni termoreaktivni materiali za brizganje (vključno s polnjenimi in ojačanimi spojinami) in trdni termoreaktivni trakovi (vključno z laminati);
- z vlakni ojačani termoreaktivni in plastomerni kompoziti, ki vsebujejo enosmerne ali večsmerne ojačitve (kot so mati, tkanine, tkani rovingi, rezane niti, kombinacijske in hibridne ojačitve, rovingi in brušena vlakna) ali vsebujejo trakove iz predhodno impregniranih materialov, vključno s polnjenimi in ojačanimi spojinami;
- termotropni polimeri iz tekočih kristalov.
1.5 Zarezani vzorci običajno niso primerni za uporabo s trdnimi penjenimi materiali, kompoziti, ojačanimi z dolgimi vlakni, ali termotropnimi polimeri iz tekočih kristalov. V teh primerih se lahko uporabijo nezarezani vzorci.
1.6 Metoda je primerna za uporabo pri vzorcih, oblikovanih glede na izbrane mere, strojno obdelanih iz osrednjega dela standardnega večnamenskega preskusnega vzorca (glej ISO 3167) ali strojno obdelanih iz končnih proizvodov ali polizdelkov, kot so odlitki, laminati ali iztisnjeni ali uliti trakovi.
1.7 Metoda določa prednostne mere za preskusne vzorce. Rezultati preskusov, ki se izvajajo na vzorcih različnih mer ali z različnimi zarezami ali na vzorcih, ki so pripravljeni pod drugačnimi pogoji, morda ne bodo primerljivi. Na rezultate lahko vplivajo tudi drugi dejavniki, kot so energetska zmogljivost aparata, udarna hitrost in priprava vzorca. Kadar so potrebni primerjalni podatki, je zato treba te dejavnike skrbno nadzorovati in beležiti.
1.8 Metoda se ne sme uporabljati kot vir podatkov za izračun zasnove. Informacije o značilnem obnašanju materiala se lahko pridobijo s preskušanjem pri različnih temperaturah, s spreminjanjem polmera zareze in/ali debeline vzorca ter s preskušanjem vzorcev, pripravljenih pod različnimi pogoji.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 179-1:2010
01-september-2010
1DGRPHãþD
SIST EN ISO 179-1:2001
SIST EN ISO 179-1:2001/A1:2005
Polimerni materiali - Ugotavljanje udarne žilavosti pa Charpyju - 1. del: Preskus
udarne žilavosti z neinstrumentalno metodo (ISO 179-1:2010)
Plastics - Determination of Charpy impact properties - Part 1: Non-instrumented impact
test (ISO 179-1:2010)
Kunstststoffe - Bestimmung der Charpy-Schlageigenschaften - Teil 1: Nicht
instrumentierte Schlagzähigkeitsprüfung (ISO 179-1:2010)
Plastiques - Détermination des caractéristiques au choc Charpy - Partie 1: Essai de choc
non instrumenté (ISO 179-1:2010)
Ta slovenski standard je istoveten z: EN ISO 179-1:2010
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 179-1:2010 en,fr
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 179-1:2010
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SIST EN ISO 179-1:2010
EUROPEAN STANDARD
EN ISO 179-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2010
ICS 83.080.01 Supersedes EN ISO 179-1:2000
English Version
Plastics - Determination of Charpy impact properties - Part 1:
Non-instrumented impact test (ISO 179-1:2010)
Plastiques - Détermination des caractéristiques au choc Kunstststoffe - Bestimmung der Charpy-
Charpy - Partie 1: Essai de choc non instrumenté (ISO 179- Schlageigenschaften - Teil 1: Nicht instrumentierte
1:2010) Schlagzähigkeitsprüfung (ISO 179-1:2010)
This European Standard was approved by CEN on 19 May 2010.
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 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 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, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2010 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 179-1:2010: E
worldwide for CEN national Members.
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SIST EN ISO 179-1:2010
EN ISO 179-1:2010 (E)
Contents Page
Foreword .3
2
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SIST EN ISO 179-1:2010
EN ISO 179-1:2010 (E)
Foreword
This document (EN ISO 179-1:2010) 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 2010, and conflicting national standards shall be withdrawn
at the latest by December 2010.
Attention is 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.
This document supersedes EN ISO 179-1:2000.
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, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.
Endorsement notice
The text of ISO 179-1:2010 has been approved by CEN as a EN ISO 179-1:2010 without any modification.
3
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SIST EN ISO 179-1:2010
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SIST EN ISO 179-1:2010
INTERNATIONAL ISO
STANDARD 179-1
Second edition
2010-06-15
Plastics — Determination of Charpy
impact properties —
Part 1:
Non-instrumented impact test
Plastiques — Détermination des caractéristiques au choc Charpy —
Partie 1: Essai de choc non instrumenté
Reference number
ISO 179-1:2010(E)
©
ISO 2010
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
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ii © ISO 2010 – All rights reserved
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
Contents Page
Foreword .iv
1 Scope.1
2 Normative references.2
3 Terms and definitions .2
4 Principle.3
5 Apparatus.3
5.1 Test machine.3
5.2 Micrometers and gauges .3
6 Test specimens.4
6.1 Preparation.4
6.1.1 Moulding and extrusion compounds .4
6.1.2 Sheets.4
6.1.3 Long-fibre-reinforced materials .4
6.1.4 Checking.7
6.1.5 Notching .7
6.2 Anisotropy.7
6.3 Shape and dimensions .8
6.3.1 Materials not exhibiting interlaminar shear fracture .8
6.3.2 Materials exhibiting interlaminar shear fracture (e.g. long-fibre-reinforced materials).9
6.4 Number of test specimens.9
6.5 Definition of span between specimen supports, L .10
6.6 Conditioning .11
7 Procedure.11
8 Calculation and expression of results .12
8.1 Unnotched specimens .12
8.2 Notched specimens.12
8.3 Statistical parameters .13
8.4 Significant figures .13
9 Precision.13
10 Test report.13
Annex A (informative) Additional methods for investigating the influence of surface effects.15
Annex B (informative) Precision data .17
Annex C (informative) Determining the notch tip radius using a CCD microscope .19
Bibliography.22
© ISO 2010 – All rights reserved iii
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SIST EN ISO 179-1:2010
ISO 179-1:2010(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.
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
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 patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 179-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical
properties.
This second edition cancels and replaces the first edition (ISO 179-1:2000), which has been technically
revised. The main changes are as follows:
⎯ a new subclause (6.5) has been added, defining the span between the specimen supports and indicating
a convenient position at which it can be measured;
⎯ a new annex, Annex C, has been added, giving a method of measuring the radius of the notch in a
notched specimen.
This second edition also incorporates the Amendment ISO 179-1:2000/Amd.1:2005.
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 test
iv © ISO 2010 – All rights reserved
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SIST EN ISO 179-1:2010
INTERNATIONAL STANDARD ISO 179-1:2010(E)
Plastics — Determination of Charpy impact properties —
Part 1:
Non-instrumented impact test
1 Scope
1.1 This part of ISO 179 specifies a method for determining the Charpy impact strength of plastics under
defined conditions. A number of different types of specimen and test configurations are defined. Different test
parameters are specified according to the type of material, the type of test specimen and the type of notch.
1.2 The method can be used to investigate the behaviour of specified types of specimen under the impact
conditions defined and for estimating the brittleness or toughness of specimens within the limitations inherent
in the test conditions. It can also be used for the determination of comparative data from similar types of
material.
[1]
1.3 The method has a greater range of applicability than that given in ISO 180 and is more suitable for
the testing of materials showing interlaminar shear fracture or of materials exhibiting surface effects due to
environmental factors.
1.4 The method is suitable for use with the following range of materials:
⎯ rigid thermoplastic moulding and extrusion materials (including filled and reinforced compounds in
addition to unfilled types) and rigid thermoplastics sheets;
⎯ rigid thermosetting moulding materials (including filled and reinforced compounds) and rigid thermosetting
sheets (including laminates);
⎯ fibre-reinforced thermosetting and thermoplastic composites incorporating unidirectional or multi-
directional reinforcements (such as mats, woven fabrics, woven rovings, chopped strands, combination
and hybrid reinforcements, rovings and milled fibres) or incorporating sheets made from pre-impregnated
materials (prepregs), including filled and reinforced compounds;
⎯ thermotropic liquid-crystal polymers.
1.5 Notched samples are not normally suitable for use with rigid cellular materials, long-fibre-reinforced
composites or thermotropic liquid-crystal polymers. In these cases, unnotched samples may be used.
1.6 The method is suited to the use of specimens moulded to the chosen dimensions, machined from the
central portion of a standard multipurpose test specimen (see ISO 3167) or machined from finished or
semifinished products such as mouldings, laminates and extruded or cast sheet.
1.7 The method specifies preferred dimensions for the test specimen. Tests which are carried out on
specimens of different dimensions or with different notches, or specimens which are prepared under different
conditions, might produce results which are not comparable. Other factors, such as the energy capacity of the
apparatus, the impact velocity and the conditioning of the specimens can also influence the results.
Consequently, when comparative data are required, these factors must be carefully controlled and recorded.
© ISO 2010 – All rights reserved 1
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
1.8 The method should not be used as a source of data for design calculations. Information on the typical
behaviour of a material can be obtained, however, by testing at different temperatures, by varying the notch
radius and/or the specimen thickness and by testing specimens prepared under different conditions.
2 Normative references
The following referenced documents are 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) applies.
ISO 291, Plastics — Standard atmospheres for conditioning and testing
ISO 293, Plastics — Compression moulding of test specimens of thermoplastic materials
ISO 294-1, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 1: General
principles, and moulding of multipurpose and bar test specimens
ISO 294-3, Plastics — Injection moulding of test specimens of thermoplastic materials — Part 3: Small plates
ISO 295, Plastics — Compression moulding of test specimens of thermosetting materials
ISO 1268-11, Fibre-reinforced plastics — Methods of producing test plates — Part 11: Injection moulding of
BMC and other long-fibre moulding compounds — Small plates
ISO 2602, Statistical interpretation of test results — Estimation of the mean — Confidence interval
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 3167, Plastics — Multipurpose test specimens
ISO 10724-1, Plastics — Injection moulding of test specimens of thermosetting powder moulding compounds
(PMCs) — Part 1: General principles and moulding of multipurpose test specimens
ISO 13802, Plastics — Verification of pendulum impact-testing machines — Charpy, Izod and tensile
impact-testing
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
Charpy unnotched impact strength
a
cU
impact energy absorbed in breaking an unnotched specimen, referred to the original cross-sectional area of
the specimen
2
NOTE It is expressed in kilojoules per square metre (kJ/m ).
3.2
Charpy notched impact strength
a
cN
impact energy absorbed in breaking a notched specimen, referred to the original cross-sectional area of the
specimen at the notch, where N = A, B or C, depending on the notch type (see 6.3.1.1.2)
2
NOTE It is expressed in kilojoules per square metre (kJ/m ).
2 © ISO 2010 – All rights reserved
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
3.3
edgewise impact
e
direction of blow parallel to the dimension b, with impact on the narrow longitudinal surface h × l of the
specimen (see Figure 1, left, and Figures 2 and 4)
3.4
flatwise impact
f
direction of blow parallel to the dimension h, with impact on the broad longitudinal surface b × l of the
specimen (see Figure 1, right, and Figures 3 and 4)
3.5
normal impact
n
〈laminar-reinforced plastics〉 impact with the direction of blow normal to the plane of reinforcement (see
Figure 4)
3.6
parallel impact
p
〈laminar-reinforced plastics〉 impact with the direction of blow parallel to the plane of reinforcement (see
Figure 4)
4 Principle
The test specimen, supported near its ends as a horizontal beam, is impacted by a single blow of a striker,
with the line of impact midway between the supports, and bent at a high, nominally constant, velocity.
In the case of edgewise impact with notched specimens, the line of impact is directly opposite the single notch
(see Figure 1, left, and Figure 2).
5 Apparatus
5.1 Test machine
The principles, characteristics and verification of suitable test machines are detailed in ISO 13802.
ISO 13802 describes partial verification and full verification. In the case of full verification, some items are
difficult to verify when the apparatus is assembled. Such verifications are assumed to be incumbent on the
manufacturer.
5.2 Micrometers and gauges
Micrometers and gauges capable of measuring the essential dimensions of test specimens to an accuracy of
0,02 mm are required. For measuring the dimension b of notched specimens, the micrometer shall have a
N
spindle with a measuring tip having a suitable profile to fit the shape of the notch.
© ISO 2010 – All rights reserved 3
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
a) Edgewise impact b) Flatwise impact
Key
1 direction of blow
2 rod of pendulum
3 test specimen
4 notch
5 support
Figure 1 — Striking edge and support blocks for type 1 test specimen at moment of impact
6 Test specimens
6.1 Preparation
6.1.1 Moulding and extrusion compounds
Specimens shall be prepared in accordance with the relevant material specification. The specimens shall be
either directly compression moulded in accordance with ISO 293 or ISO 295 or injection moulded from the
material in accordance with ISO 294-1, ISO 294-3 or ISO 10724-1, as appropriate, or machined in accordance
with ISO 2818 from sheet that has been compression or injection moulded from the compound. Type 1
specimens may be cut from multipurpose test specimens complying with ISO 3167, type A.
6.1.2 Sheets
Specimens shall be machined from sheets in accordance with ISO 2818.
6.1.3 Long-fibre-reinforced materials
A panel shall be prepared in accordance with ISO 1268-11 or another specified or agreed upon preparation
procedure. Specimens shall be machined in accordance with ISO 2818.
4 © ISO 2010 – All rights reserved
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
Key
1 direction of blow
Figure 2 — Charpy edgewise impact (e) with single-notched specimen
Key
1 direction of blow
Figure 3 — Charpy flatwise impact (f)
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
Key
1 direction of blow
Edgewise (e) and flatwise (f) indicate the direction of the blow with respect to the specimen thickness, h, and specimen
width, b. Normal (n) and parallel (p) indicate the direction of the blow with respect to the laminate plane.
The Charpy “fn” and “ep” tests are used for laminates, while both the Charpy “en” and “ep” tests are used for other
materials. The Charpy “fn” and “fp” tests are used for testing materials exhibiting surface effects.
Figure 4 — Scheme of designations describing the direction of blow
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
6.1.4 Checking
The specimens shall be free of twist and shall have mutually perpendicular parallel surfaces. The surfaces
and edges shall be free from scratches, pits, sink marks and flash.
The specimens shall be checked for conformity with these requirements by visual observation against
straightedges, set squares and flat plates, and by measuring with micrometer callipers.
Specimens showing measurable or observable departure from one or more of these requirements shall be
rejected or machined to proper size and shape before testing.
6.1.5 Notching
6.1.5.1 Machined notches shall be prepared in accordance with ISO 2818. The profile of the cutting tooth
shall be such as to produce in the specimen a notch of the contour and depth shown in Figure 5, at right
angles to its principal axes (see Note).
NOTE The radius of the notch tip can be measured by the method given in Annex C.
6.1.5.2 Specimens with moulded-in notches may be used if specified for the material being tested
(see Note).
NOTE Specimens with moulded-in notches do not give results comparable to those obtained from specimens with
machined notches.
a) Type A b) Type B c) Type C
Radius of notch tip Radius of notch tip Radius of notch tip
r = (0,25 ± 0,05) mm r = (1,00 ± 0,05) mm r = (0,10 ± 0,02) mm
N N N
Figure 5 — Notch types
6.2 Anisotropy
Certain types of sheet or panel material or specimen taken from injection-moulded plates can show different
impact properties, depending on the direction in the plane of the sheet or panel. In such cases, it is customary
to cut groups of test specimens with their major axes respectively parallel and perpendicular to the direction of
some feature of the sheet or panel which is either visible or inferred from knowledge of the method of
manufacture.
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
6.3 Shape and dimensions
6.3.1 Materials not exhibiting interlaminar shear fracture
6.3.1.1 Moulding and extrusion compounds
6.3.1.1.1 Type 1 test specimens, unnotched or with one of three different types of notch, shall be used as
specified in Tables 1 and 2 and shown in Figures 2 and 5. The notch shall be located at the centre of the
specimen. Type 1 specimens (see Table 1) may be taken from the central part of the type A multipurpose test
specimen specified in ISO 3167.
Table 1 — Specimen types, specimen dimensions and spans between specimen supports
(see Figures 2 and 6)
Dimensions in millimetres
a a a
Length Width Thickness Span
Specimen type
l b h L
+0,5
1 80 ± 2 10,0 ± 0,2 4,0 ± 0,2 62
-0,0
b
2 25h 20h
d
c
3
10 or 15
b
3
11h or 13h 6h or 8h
a
The specimen dimensions (thickness, h, width, b, and length, l) are defined by h < b < l.
b
Specimen types 2 and 3 shall be used only for materials described in 6.3.2.
c
10 mm for materials reinforced with a fine structure, 15 mm for those with a large stitch structure (see 6.3.2.2).
d
Preferred thickness. If the specimen is cut from a sheet or a piece, h shall be equal to the thickness of the sheet or piece, up to
10,2 mm (see 6.3.1.2)
Table 2 — Method designations, specimen types, notch types and notch dimensions —
Materials not exhibiting interlaminar shear fracture
Dimensions in millimetres
Remaining
Notch tip radius,
Specimen width, b , at
a r
N
Method designation Blow direction Notch type N
type notch tip
(see Figure 5)
(see Figure 2)
b
ISO 179-1/1eA A 0,25 ± 0,05 8,0 ± 0,2
ISO 179-1/1eB B 1,00 ± 0,05 8,0 ± 0,2
Edgewise
1
ISO 179-1/1eC C 0,10 ± 0,02 8,0 ± 0,2
b
ISO 179-1/1eU Unnotched
c
ISO 179-1/1fU Flatwise Unnotched
a
If specimens are taken from sheet or products, the thickness of the sheet or product shall be added to the designation. Unreinforced
specimens shall not be tested with their machined surface under tension.
b
Preferred method.
c
Especially for the study of surface effects (see 6.3.1.1.3).
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SIST EN ISO 179-1:2010
ISO 179-1:2010(E)
6.3.1.1.2 The preferred type of notch is type A (see Table 2 and Figure 5). For most materials, unnotched
specimens or specimens with a single type A notch tested by edgewise impact (see 3.3) are suitable. If
specimens with a type A notch do not break during the test, specimens with a type C notch shall be used. If
information on the notch sensitivity of the material is desired, specimens with notch types A, B and C shall be
tested.
6.3.1.1.3 Unnotched or double-notched specimens tested by flatwise impact (see 3.4) can be used to study
surface effects (see 1.3 and Annex A).
6.3.1.2 Sheet materials
The recommended value of the thickness, h, is 4 mm. If the specimen is cut from a sheet or a piece taken
from a structure, the thickness of the specimen, up to 10,2 mm, shall be the same as the thickness of the
sheet or the structure.
Specimens taken from pieces thicker than 10,2 mm shall be machined to (10 ± 0,2) mm from one surface,
provided that the sheet is homogeneous in its thickness and contains only one type of reinforcement uniformly
distributed. If unnotched or double-notched specimens are tested by flatwise impact, the original surface shall
be tested under tension.
6.3.2 Materials exhibiting interlaminar shear fracture (e.g. long-fibre-reinforced materials)
6.3.2.1 Unnotched specimens of type 2 or 3 are used. Apart from the thickness, the specimen
dimensions are not specified. The most important parameter is the ratio of the span between the specimen
supports to the specimen dimension in the direction of the blow (see Table 1).
Usually specimens are tested in the normal direction (see Figure 4).
6.3.2.2 “Flatwise normal” testing (see Figure 4): the width of specimen shall be 10 mm for materials
reinforced with a fine structure (thin fabrics and parallel yarns) and 15 mm for materials rei
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