EN ISO 6721-1:2019
(Main)Plastics - Determination of dynamic mechanical properties - Part 1: General principles (ISO 6721-1:2019)
Plastics - Determination of dynamic mechanical properties - Part 1: General principles (ISO 6721-1:2019)
The various parts of ISO 6721 specify methods for the determination of the dynamic mechanical properties of rigid plastics within the region of linear viscoelastic behaviour. This document specifies the definitions and describes the general principles including all aspects that are common to the individual test methods described in the subsequent parts.
Different deformation modes can produce results that are not directly comparable. For example, tensile vibration results in a stress which is uniform across the whole thickness of the specimen, whereas flexural measurements are influenced preferentially by the properties of the surface regions of the specimen.
Values derived from flexural-test data will be comparable to those derived from tensile-test data only at strain levels where the stress-strain relationship is linear and for specimens which have a homogeneous structure.
Kunststoffe - Bestimmung dynamisch-mechanischer Eigenschaften - Teil 1: Allgemeine Grundlagen (ISO 6721-1:2019)
Die verschiedenen Teile von ISO 6721 legen Verfahren zur Bestimmung der dynamisch-mechanischen Eigenschaften von steifen Kunststoffen im Bereich des linear-viskoelastischen Verhaltens fest. Dieses Dokument spezifiziert die Definitionen und beschreibt die allgemeinen Prinzipien, einschließlich aller Gesichtspunkte, die die einzelnen, in den folgenden Teilen beschriebenen Prüfverfahren gemeinsam haben.
Unterschiedliche Deformationsarten können Ergebnisse hervorrufen, die nicht direkt vergleichbar sind. Zum Beispiel ergeben Zugschwingungen Spannungen, die über die gesamte Dicke des Probekörpers gleichförmig sind, während Biege-Messungen bevorzugt durch die Eigenschaften von Oberflächen-Gebieten des Probe¬körpers beeinflusst sind.
Eigenschaftswerte aus Biegeprüfungen sind nur mit solchen aus Zugprüfungen vergleichbar in Spannungs¬bereichen, in denen die Spannungs-Dehnungs-Beziehung linear ist, und für Probekörper mit homogener Struktur.
Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 1: Principes généraux (ISO 6721-1:2019)
Les différentes parties de l'ISO 6721 spécifient des méthodes pour la détermination des propriétés mécaniques dynamiques de plastiques rigides dans le domaine de comportement viscoélastique linéaire. Le présent document spécifie les définitions et décrit les principes généraux incluant tous les aspects communs à toutes les méthodes individuelles décrites dans les parties suivantes.
Les différents modes de déformation peuvent produire des résultats qui ne sont pas directement comparables. Par exemple, la vibration en traction conduit à une contrainte uniforme dans toute l'épaisseur de l'éprouvette, alors que les mesurages en flexion sont influencés préférentiellement par les propriétés des couches superficielles de l'éprouvette.
Les valeurs découlant des données de l'essai de flexion seront comparables à celles découlant des données de l'essai de traction seulement aux niveaux de déformation pour lesquels la relation contrainte-déformation est linéaire, et pour des éprouvettes de structure homogène.
Polimerni materiali - Ugotavljanje dinamičnih mehanskih lastnosti - 1. del: Splošna načela (ISO 6721-1:2019)
Različni deli standarda ISO 6721 določajo metode za določanje dinamičnih mehanskih lastnosti togih polimerov v območju linearnega viskoelastičnega vedenja. Ta dokument določa
opredelitve in opisuje splošna načela, vključno z vsemi vidiki, ki so skupni posameznim preskusnim metodam, opisanim v naslednjih delih.
Različni načini deformacije lahko dajo rezultate, ki niso neposredno primerljivi. Natezne vibracije na primer povzročijo napetost, ki je enakomerna po celotni debelini vzorca, medtem ko na upogibne meritve prednostno vplivajo lastnosti površinskih predelov preskušanca.
Vrednosti, pridobljene z upogibnim preskusom, bodo z vrednostmi, pridobljenimi z nateznim preskusom, primerljive le pri stopnji natezanja, pri čemer je razmerje med napetostjo in deformacijo linearno, in za preskušance, ki imajo homogeno strukturo.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-september-2019
Nadomešča:
SIST EN ISO 6721-1:2012
Polimerni materiali - Ugotavljanje dinamičnih mehanskih lastnosti - 1. del: Splošna
načela (ISO 6721-1:2019)
Plastics - Determination of dynamic mechanical properties - Part 1: General principles
(ISO 6721-1:2019)
Kunststoffe - Bestimmung dynamisch-mechanischer Eigenschaften - Teil 1: Allgemeine
Grundlagen (ISO 6721-1:2019)
Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 1: Principes
généraux (ISO 6721-1:2019)
Ta slovenski standard je istoveten z: EN ISO 6721-1:2019
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 6721-1
EUROPEAN STANDARD
NORME EUROPÉENNE
May 2019
EUROPÄISCHE NORM
ICS 83.080.01 Supersedes EN ISO 6721-1:2011
English Version
Plastics - Determination of dynamic mechanical properties
- Part 1: General principles (ISO 6721-1:2019)
Plastiques - Détermination des propriétés mécaniques Kunststoffe - Bestimmung dynamisch-mechanischer
dynamiques - Partie 1: Principes généraux (ISO 6721- Eigenschaften - Teil 1: Allgemeine Grundlagen (ISO
1:2019) 6721-1:2019)
This European Standard was approved by CEN on 8 June 2018.
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.
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Turkey and United Kingdom.
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COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
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© 2019 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 6721-1:2019 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 6721-1:2019) 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 November 2019, and conflicting national standards
shall be withdrawn at the latest by November 2019.
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 6721-1:2011.
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, Former Yugoslav Republic of Macedonia,
France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta,
Netherlands, Norway, Poland, Portugal, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
Endorsement notice
The text of ISO 6721-1:2019 has been approved by CEN as EN ISO 6721-1:2019 without any
modification.
INTERNATIONAL ISO
STANDARD 6721-1
Fourth edition
2019-04
Plastics — Determination of dynamic
mechanical properties —
Part 1:
General principles
Plastiques — Détermination des propriétés mécaniques
dynamiques —
Partie 1: Principes généraux
Reference number
ISO 6721-1:2019(E)
©
ISO 2019
ISO 6721-1:2019(E)
© ISO 2019
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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ISO 6721-1:2019(E)
Contents Page
Foreword .iv
Introduction .v
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 9
5 Test apparatus .12
5.1 Type .12
5.2 Mechanical, electronic and recording systems .12
5.3 Temperature-controlled enclosure .12
5.4 Gas supply .12
5.5 Temperature-measurement device .12
5.6 Devices for measuring test specimen dimensions .12
6 Test specimens.12
6.1 General .12
6.2 Shape and dimensions .13
6.3 Preparation .13
7 Number of test specimens .13
8 Conditioning .13
9 Procedure.13
9.1 Test atmosphere .13
9.2 Measurement of specimen cross-section .13
9.3 Mounting the test specimens .13
9.4 Varying the temperature .13
9.5 Varying the frequency .14
9.6 Varying the dynamic-strain amplitude.14
10 Expression of results .14
11 Precision .15
12 Test report .15
Annex A (informative) Resonance curves .16
Annex B (informative) Deviations from linear behaviour .22
Bibliography .23
ISO 6721-1:2019(E)
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
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This document was prepared by Technical Committee ISO/TC 61, Plastics, Subcommittee SC 5, Physical-
chemical properties.
This fourth edition cancels and replaces the third edition (ISO 6721-1:2011), which has been technically
revised. The main changes compared to the previous edition are as follows:
— the document has been revised editorially;
— normative refer
...
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