SIST EN ISO 899-1:2003
(Main)Plastics - Determination of creep behaviour - Part 1: Tensile creep (ISO 899-1:2003)
Plastics - Determination of creep behaviour - Part 1: Tensile creep (ISO 899-1:2003)
1.1 This part of ISO 899 specifies a method for determining the tensile creep of plastics in the form of
standard test specimens under specified conditions such as those of pretreatment, temperature and humidity.
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-bell-shaped test specimens moulded
directly or machined from sheets or moulded articles.
1.3 The method is intended to provide data for engineering-design and research and development
purposes. 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 Tensile creep may vary significantly with differences 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 tensile-creep 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.
Kunststoffe - Bestimmung des Kriechverhaltens - Teil 1: Zeitstand-Zugversuch (ISO 899-1:2003)
1.1 Dieser Teil von ISO 899 legt ein Verfahren zur Bestimmung des Kriechverhaltens von Kunststoffen in Form von genormten Probekörpern unter Zugbeanspruchung unter festgelegten Bedingungen z. B. von Vorbehandlung, Temperatur und Feuchte fest.
1.2 Das Verfahren ist geeignet für die Anwendung auf steife und halbsteife unverstärkte, gefüllte und faserver-stärkte Kunststoff-Formmassen (siehe ISO 472 wegen der Definitionen) in Form von mit Schultern versehenen Probekörpern, die entweder direkt gespritzt oder spanend aus Platten oder gespritzten Fertigteilen entnommen wurden.
1.3 Das Verfahren liefert Daten für konstruktive Zwecke sowie für Forschung und Entwicklung. Daten zur Verwendung in der Dimensionierung von Bauteilen erfordern den Gebrauch von Extensometern zur genauen Bestimmung der Dehnung. Daten für Forschungs- oder Qualitätssicherungszwecke können unter Verwendung der Änderung des Klemmen- bzw. Traversenweges (nominelle Dehnung) bestimmt werden.
1.4 Das Zug-Kriech-Verhalten kann in starkem Maße von der Herstellung und den Maßen des Probekörpers abhängen sowie von den Umgebungsbedingungen bei der Prüfung. Die thermische Vorbehandlung des Probe-körpers kann ebenfalls einen ausgeprägten Effekt auf sein Kriechverhalten haben (siehe Anhang A). Daraus folgt, dass bei genauen Vergleichsmessungen diese Einflussfaktoren sorgfältig beachtet werden müssen.
1.5 Wenn Eigenschaften aus dem Zeitstand-Zugversuch für konstruktive Zwecke verwendet werden sollen, sollten die Kunststoffe über einen breiten Bereich von Spannungen, Zeiten und Umgebungsbedingungen geprüft werden.
Plastiques - Détermination du comportement au fluage - Partie 1: Fluage en traction (ISO 899-1:2003)
L'ISO 899-1:2003 décrit une méthode de détermination du fluage en traction des plastiques sous forme d'éprouvettes normalisées dans des conditions spécifiées, telles qu'en matière de traitement préalable, de température et d'humidité.
Cette méthode est destinée aux plastiques rigides et semi-rigides, non renforcés, chargés et renforcés par des fibres (voir ISO 472 pour les définitions) sous forme d'éprouvettes en forme d'haltères moulées directement ou usinées à partir de feuilles ou d'objets moulés.
Cette méthode est proposée pour fournir des données utiles pour la conception en ingénierie, la recherche et le développement. Les données utiles pour la conception en ingénierie nécessitent l'emploi de l'extensométrie basée sur la longueur de référence de l'éprouvette. Les données pour la recherche ou le contrôle peuvent utiliser la méthode nominale de fluage en traction.
Le fluage en traction peut dépendre étroitement des différences existant en matière de dimensions et de préparation des éprouvettes ainsi qu'en ce qui concerne l'environnement d'essai. L'histoire thermique de l'éprouvette peut également influencer profondément son comportement au fluage. En conséquence, lorsque des résultats comparatifs précis sont requis, ces facteurs doivent être contrôlés avec soin.
Si les caractéristiques de fluage en traction sont destinées à des fins de conception en ingénierie, il convient de soumettre les plastiques à l'essai dans une large gamme de contraintes, de durées et d'environnements.
Polimerni materiali - Ugotavljanje lezenja - 1. del: Lezenje pri natezni obremenitvi (ISO 899-1:2003)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
SIST EN ISO 899-1:2003
01-december-2003
1DGRPHãþD
SIST EN ISO 899-1:2000
Polimerni materiali - Ugotavljanje lezenja - 1. del: Lezenje pri natezni obremenitvi
(ISO 899-1:2003)
Plastics - Determination of creep behaviour - Part 1: Tensile creep (ISO 899-1:2003)
Kunststoffe - Bestimmung des Kriechverhaltens - Teil 1: Zeitstand-Zugversuch (ISO 899-
1:2003)
Plastiques - Détermination du comportement au fluage - Partie 1: Fluage en traction (ISO
899-1:2003)
Ta slovenski standard je istoveten z: EN ISO 899-1:2003
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 899-1:2003 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN ISO 899-1:2003
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SIST EN ISO 899-1:2003
EUROPEAN STANDARD
EN ISO 899-1
NORME EUROPÉENNE
EUROPÄISCHE NORM
June 2003
ICS 83.080.01 Supersedes EN ISO 899-1:1996
English version
Plastics - Determination of creep behaviour - Part 1: Tensile
creep (ISO 899-1:2003)
Plastiques - Détermination du comportement au fluage - Kunststoffe - Bestimmung des Kriechverhaltens - Teil 1:
Partie 1: Fluage en traction (ISO 899-1:2003) Zeitstand-Zugversuch (ISO 899-1:2003)
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 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 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 Management Centre has the same status as the official
versions.
CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece,
Hungary, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and United
Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre: rue de Stassart, 36 B-1050 Brussels
© 2003 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 899-1:2003 E
worldwide for CEN national Members.
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SIST EN ISO 899-1:2003
EN ISO 899-1:2003 (E)
CORRECTED 2003-07-16
Foreword
This document (EN ISO 899-1:2003) 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 IBN.
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 2003, and conflicting national
standards shall be withdrawn at the latest by December 2003.
This document supersedes EN ISO 899-1:1996.
According to the CEN/CENELEC Internal Regulations, the national standards organizations of
the following countries are bound to implement this European Standard: Austria, Belgium, Czech
Republic, Denmark, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy,
Luxembourg, Malta, Netherlands, Norway, Portugal, Slovakia, Spain, Sweden, Switzerland and
the United Kingdom.
Endorsement notice
The text of ISO 899-1:2003 has been approved by CEN as EN ISO 899-1:2003 without any
modifications.
NOTE Normative references to International Standards are listed in Annex ZA (normative).
2
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SIST EN ISO 899-1:2003
EN ISO 899-1:2003 (E)
Annex ZA
(normative)
Normative references to international publications
with their relevant European publications
This European Standard incorporates by dated or undated reference, provisions from other
publications. These normative references are cited at the appropriate places in the text and the
publications are listed hereafter. For dated references, subsequent amendments to or revisions of
any of these publications apply to this European Standard only when incorporated in it by
amendment or revision. For undated references the latest edition of the publication referred to
applies (including amendments).
NOTE Where an International Publication has been modified by common modifications, indicated
by (mod.), the relevant EN/HD applies.
Publication Year Title EN Year
ISO 62 1999 Plastics — Determination of water EN ISO 62 1999
absorption
ISO 291 1997 Plastics — Standard atmospheres for EN ISO 291 1997
conditioning and testing
ISO 472 1999 Plastics — Vocabulary EN ISO 472 2001
ISO 527-1 1993 Plastics — Determination of tensile EN ISO 527-1 1996
properties — Part 1: General principles
ISO 527-2 1993 Plastics — Determination of tensile EN ISO 527-2 1996
properties — Part 2: Test conditions
for moulding and extrusion plastics
ISO 10350-1 1998 Plastics — Acquisition and EN ISO 10350-1 2000
presentation of comparable single-
point data — Part 1: Moulding
materials
ISO 11403-1 2001 Plastics — Acquisition and EN ISO 11403-1 2003
presentation of comparable multipoint
data — Part 1: Mechanical properties
3
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SIST EN ISO 899-1:2003
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SIST EN ISO 899-1:2003
INTERNATIONAL ISO
STANDARD 899-1
Second edition
2003-06-01
Plastics — Determination of creep
behaviour —
Part 1:
Tensile creep
Plastiques — Détermination du comportement au fluage —
Partie 1: Fluage en traction
Reference number
ISO 899-1:2003(E)
©
ISO 2003
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SIST EN ISO 899-1:2003
ISO 899-1:2003(E)
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ii © ISO 2003 — All rights reserved
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SIST EN ISO 899-1:2003
ISO 899-1:2003(E)
Contents Page
Foreword. iv
1 Scope. 1
2 Normative references. 1
3 Terms and definitions. 2
4 Apparatus. 4
5 Test specimens. 4
6 Procedure. 5
7 Expression of results. 6
8 Test report. 9
Annex A (informative) Physical-ageing effects on the creep of polymers . 11
Bibliography . 15
© ISO 2003 — All rights reserved iii
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SIST EN ISO 899-1:2003
ISO 899-1:2003(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 899-1 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical
properties.
This second edition cancels and replaces the first edition (ISO 899-1:1993), which has been technically
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
iv © ISO 2003 — All rights reserved
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SIST EN ISO 899-1:2003
INTERNATIONAL STANDARD ISO 899-1:2003(E)
Plastics — Determination of creep behaviour —
Part 1:
Tensile creep
1 Scope
1.1 This part of ISO 899 specifies a method for determining the tensile creep of plastics in the form of
standard test specimens under specified conditions such as those of pretreatment, temperature and humidity.
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-bell-shaped test specimens moulded
directly or machined from sheets or moulded articles.
1.3 The method is intended to provide data for engineering-design and research and development
purposes. 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 Tensile creep may vary significantly with differences 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 tensile-creep 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.
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 62:1999, Plastics — Determination of water absorption
ISO 291:1997, Plastics — Standard atmospheres for conditioning and testing
ISO 472:1999, Plastics — Vocabulary
ISO 527-1:1993, Plastics — Determination of tensile properties — Part 1: General principles
ISO 527-2:1993, Plastics — Determination of tensile properties — Part 2: Test conditions for moulding and
extrusion plastics
ISO 10350-1:1998, Plastics — Acquisition and presentation of comparable single-point data — Part 1:
Moulding materials
© ISO 2003 — All rights reserved 1
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SIST EN ISO 899-1:2003
ISO 899-1:2003(E)
ISO 11403-1:2001, Plastics — Acquisition and presentation of comparable multipoint data — Part 1:
Mechanical properties
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 472 and the following apply.
3.1
creep
increase in strain with time when a constant force is applied
3.2
initial stress
σ
tensile force per unit area of the initial cross-section within the gauge length
NOTE 1 It is given by the equation
F
σ =
A
where
F is the force, in newtons;
A is the average initial cross-sectional area within the narrow (gauge) section of the specimen, in square
millimetres.
NOTE 2 It is expressed in megapascals.
3.3
extension
(∆L)
t
increase in the distance between the gauge marks, expressed in millimetres, at time t
NOTE It is given by the equation
(∆L)=−LL
tt 0
where
L is the gauge length, in millimetres, at any given time t during the test;
t
L is the original gauge length, in millimetres, of the specimen after application of a preload but prior to application
0
of the test load.
2 © ISO 2003 — All rights reserved
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SIST EN ISO 899-1:2003
ISO 899-1:2003(E)
3.4
nominal extension
(∆L*)
t
increase in the distance between the grips (increase in grip separation)
NOTE It is given by the equation
∗∗ ∗
(∆L )=−LL
t 0
t
where
L* is the distance between the grips at any given time t during the test, in millimetres;
t
L* is the initial distance between the grips, expressed in millimetres, holding the specimen after application of a
0
preload but prior to application of the test load.
3.5
tensile-creep strain
ε
t
change in the distance between the gauge marks, relative to the initial distance, produced by the applied load
at any given time t during a creep test
NOTE 1 It is given by the equation
(∆L)
t
ε =
t
L
0
NOTE 2 It is expressed as a dimensionless ratio or as a percentage.
3.6
nominal tensile-creep strain
ε*
t
change in the distance between the grips, relative to the initial distance, produced by the applied load at any
given time t during a creep test
NOTE 1 It is given by the equation
∗
()∆L
∗ t
ε =
t
∗
L
0
NOTE 2 It is expressed as a dimensionless ratio or as a percentage.
3.7
tensile-creep modulus
E
t
ratio of initial stress to tensile-creep strain, calculated as in 7.1.1
3.8
nominal tensile-creep modulus
E*
t
ratio of initial stress to nominal tensile-creep strain, calculated as in 7.1.2
3.9
isochronous stress-strain curve
Cartesian plot of stress versus creep strain, at a specific time after application of the test load
3.10
time to rupture
period of time the specimen is under full load until rupture
© ISO 2003 — All rights reserved 3
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SIST EN ISO 899-1:2003
ISO 899-1:2003(E)
3.11
creep-strength limit
initial stress which will just cause rupture (σ ) or will produce a specified strain (σ ) at a specified time t, at a
B,t ε,t
given temperature and relative humidity
3.12
recovery from creep
decrease in strain at any given time after completely unloading the specimen, expressed as a percentage of
the strain just prior to the removal of the load
4 Apparatus
4.1 Gripping device, capable of ensuring that the direction of the load applied to the test specimen
coincides as closely as possible with the longitudinal axis of the specimen. This ensures that the test
specimen is subjected to simple stress and that the stresses in the loaded section of the specimen may be
assumed to be uniformly distributed over cross-sections perpendicular to the direction of the applied load.
NOTE It is recommended that grips be used that will allow the specimen to be fixed in place, correctly aligned, prior
to applying the load. Self-locking grips which allow the specimen to move as the load increases are not suitable for this
test.
4.2 Loading system, capa
...
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