EN ISO 899-2:2024
(Main)Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading (ISO 899-2:2024)
Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point loading (ISO 899-2:2024)
This document specifies a method for determining the flexural creep of plastics in the form of standard test specimens under specified conditions such as those of pre-treatment, temperature and humidity. It is only applicable to a simple freely supported beam loaded at mid-span (three-point-loading test).
The method is suitable for use with rigid and semi-rigid non-reinforced, filled and fibre-reinforced plastics materials (see ISO 472 for definitions) test specimens moulded directly or machined from sheets or moulded articles.
NOTE The method can be unsuitable for certain fibre-reinforced materials due to differences in fibre orientation
The method is intended to provide data for engineering-design, quality control, research and development purposes.
The method might not be applicable for determining the flexural creep of rigid cellular plastics (attention is drawn in this respect to ISO 1209-1 and ISO 1209-2).
Kunststoffe - Bestimmung des Kriechverhaltens - Teil 2: Zeitstand-Biegeversuch bei Dreipunkt-Belastung (ISO 899-2:2024)
1.1 Dieses Dokument legt ein Verfahren zur Bestimmung des Biege-Kriech-Verhaltens von Kunststoffen in Form von genormten Probekörpern unter festgelegten Bedingungen z. B. von Vorbehandlung, Temperatur und Feuchte fest. Es ist nur auf einen einfachen, frei aufgelegten Biegebalken anwendbar, der in der Mitte belastet ist (Dreipunkt-Biegeversuch).
1.2 Das Verfahren ist geeignet für die Anwendung auf Probekörper aus steifen und halbsteifen unverstärkten, gefüllten und faserverstärkten Kunststoff-Formmassen (Definitionen siehe ISO 472), die entweder direkt gespritzt oder spanend aus Platten oder gespritzten Fertigteilen entnommen wurden.
ANMERKUNG Das Verfahren kann für bestimmte faserverstärkte Kunststoffe wegen Unterschieden in der Faserorientierung ungeeignet sein.
1.3 Das Verfahren soll Daten für konstruktive Zwecke, Qualitätskontrolle, Forschung und Entwicklung liefern.
1.4 Das Verfahren ist möglicherweise nicht anwendbar für die Bestimmung des Biege-Kriech-Verhaltens von harten Schaumstoffen (in diesem Zusammenhang wird auf ISO 1209 1 und ISO 1209 2 verwiesen).
Plastiques - Détermination du comportement au fluage - Partie 2: Fluage en flexion par mise en charge en trois points (ISO 899-2:2024)
Le présent document spécifie une méthode de détermination du fluage en flexion 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 s’applique uniquement aux poutres simples, supportées sans contrainte et chargées au milieu de leur portée (méthode de mise en charge en trois points).
Cette méthode est destinée aux éprouvettes en matériaux plastiques rigides et semi-rigides, non renforcés, chargés et renforcés par des fibres (voir l’ISO 472 pour les définitions) moulées directement ou usinées dans des feuilles ou des objets moulés.
NOTE Cette méthode peut s’avérer inappropriée dans le cas de certaines matières renforcées par des fibres en raison des différences d’orientation de celles-ci.
Cette méthode est proposée pour fournir des données utiles pour la conception en ingénierie, la recherche et le développement.
La présente méthode peut s’avérer inapplicable pour déterminer le fluage en flexion des plastiques alvéolaires rigides (à cet égard, l’attention est attirée sur l’ISO 1209-1 et l’ISO 1209-2).
Polimerni materiali - Ugotavljanje lezenja - 2. del: Lezenje pri tritočkovni obremenitvi (ISO/FDIS 899-2:2024)
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN ISO 899-2 rev:2023
01-april-2023
Nadomešča:
SIST EN ISO 899-2:2003/A1:2015
Polimerni materiali - Ugotavljanje lezenja - 2. del: Lezenje pri tritočkovni
obremenitvi (ISO/DIS 899-2:2023)
Plastics - Determination of creep behaviour - Part 2: Flexural creep by three-point
loading (ISO/DIS 899-2:2023)
Kunststoffe - Bestimmung des Kriechverhaltens - Teil 2: Zeitstand-Biegeversuch bei
Dreipunkt-Belastung (ISO/DIS 899‑2:2023)
Plastiques - Détermination du comportement au fluage - Partie 2: Fluage en flexion par
mise en charge en trois points (ISO/DIS 899-2:2023)
Ta slovenski standard je istoveten z: prEN ISO 899-2
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
oSIST prEN ISO 899-2 rev:2023 en,fr,de
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN ISO 899-2 rev:2023
oSIST prEN ISO 899-2 rev:2023
DRAFT INTERNATIONAL STANDARD
ISO/DIS 899-2
ISO/TC 61/SC 2 Secretariat: SAC
Voting begins on: Voting terminates on:
2023-02-08 2023-05-03
Plastics — Determination of creep behaviour —
Part 2:
Flexural creep by three-point loading
Plastiques — Détermination du comportement au fluage —
Partie 2: Fluage en flexion par mise en charge en trois points
ICS: 83.080.01
IMPORTANT — Please use this updated version dated 2023-01-13, and discard any
previous version of this DIS. The link to figure 4 has been corrected.
This document is circulated as received from the committee secretariat.
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
ISO/CEN PARALLEL PROCESSING
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 899-2:2023(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
PROVIDE SUPPORTING DOCUMENTATION. © ISO 2023
oSIST prEN ISO 899-2 rev:2023
ISO/DIS 899-2:2023(E)
© ISO 2023
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
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: +41 22 749 01 11
Email: copyright@iso.org
Website: www.iso.org
Published in Switzerland
ii
oSIST prEN ISO 899-2 rev:2023
ISO/DIS 899-2:2023(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Apparatus . 3
5 Test specimens . 5
6 Procedure .5
6.1 Conditioning and test atmosphere. 5
6.2 Measurement of test-specimen dimensions and distance between supports . 5
6.3 Mounting the test specimens . 5
6.4 Selection of stress value . 6
6.5 Loading procedure . 6
6.5.1 Preloading . 6
6.5.2 Loading . 6
6.6 Deflection-measurement schedule . 6
6.7 Time measurement . 6
6.8 Temperature and humidity control . 6
6.9 Measurement of recovery rate (optional) . 7
7 Expression of results . 7
7.1 Method of calculation . 7
7.1.1 Flexural-creep modulus . 7
7.1.2 Flexural-creep compliance . 7
7.1.3 Flexural stress . 7
7.1.4 Flexural-creep strain . 8
7.2 Presentation of results . 8
7.2.1 Creep curves. 8
7.2.2 Creep-modulus/time curves . 8
7.2.3 lsochronous stress-strain curves . 9
7.2.4 Three-dimensional representation . 10
7.2.5 Creep-to-rupture curves . 10
7.3 Precision . . . 10
8 Test report .10
Annex A (informative) Physical-ageing effects on the creep of polymers .12
Bibliography .16
iii
oSIST prEN ISO 899-2 rev:2023
ISO/DIS 899-2:2023(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 899-2 was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 2, Mechanical
properties.
This third edition cancels and replaces the second edition (ISO 899-2:2015), 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
The main changes are as follows:
— the accuracy requirements for the deflection measurement device were updated
— the text of ISO 899-2:2003/AMD 1:2015 has replaced the existing text in the Annex A.2
— the normative references were updated
— the definition of creep was adapted for more clearness
A list of all parts in the ISO 899 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
oSIST prEN ISO 899-2 rev:2023
DRAFT INTERNATIONAL STANDARD ISO/DIS 899-2:2023(E)
Plastics — Determination of creep behaviour —
Part 2:
Flexural creep by three-point loading
1 Scope
1.1 This part of ISO 899 specifies a method for determining the flexural creep of plastics in the form
of standard test specimens under specified conditions such as those of pre-treatment, temperature and
humidity. It applies only to a simple freely supported beam loaded at mid-span (three-point-loading
test).
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) test specimens moulded directly or machined from
sheets or moulded articles.
Note The method may be unsuitable for certain fibre-reinforced materials due to differences in fibre
orientation.
1.3 The method is intended to provide data for engineering-design, research and development
purposes. Data for engineering-design purposes requires the use of a deflectometer to measure the
deflection of the specimen.
1.4 The method may not be suitable for determining the flexural creep of rigid cellular plastics
(attention is drawn in this respect to ISO 1209-1, Cellular plastics, rigid — Flexural tests — Part 1:
Bending test, and ISO 1209-2, Cellular plastics, rigid — Flexural tests — Part 2: Determination of flexural
properties).
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements 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, Plastics — Determination of water absorption
ISO 178, Plastics — Determination of flexural properties
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 295, Plastics — Compression moulding of test specimens of thermosetting materials
ISO 2602, Statistical interpretation of test results — Estimation of the mean — Confidence interval
ISO 2818, Plastics — Preparation of test specimens by machining
ISO 472, Plastics — Vocabulary
oSIST prEN ISO 899-2 rev:2023
ISO/DIS 899-2:2023(E)
ISO 9513, Metallic materials — Calibration of extensometer systems used in uniaxial testing
ISO 10724-1, Plastics — Injection moulding of test specimens of ther
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.