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CEN

EN ISO 6721-3:1996

(Main)

Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration - Resonance-curve method (ISO 6721-3:1994, including Technical Corrigendum 1: 1995)

Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration - Resonance-curve method (ISO 6721-3:1994, including Technical Corrigendum 1: 1995)

Specifies a bending-vibration method based upon resonance curves for determining the flexural complex modulus of homogeneous plastics and the damping properties of laminated plastics intended for acoustic insulation.

Kunststoffe - Bestimmung dynamisch-mechanischer Eigenschaften - Teil 3: Biegeschwingung - Resonanzkurven-Verfahren (ISO 6721-3:1994, einschließlich Technische Korrektur 1:1995)

Dieser Teil von ISO 6721 legt ein Biegeschwingverfahren fest, bei dem mit Hilfe von Resonanzkurven der komplexe Biegemodul Ef von homogenen Kunststoffen und die Dämpfung von geschichteten Systemen bestimmt werden, die für akustische Isolation vorgesehen sind. Dies sind beispielsweise Systeme aus Metallblech mit dämpfendem Kunststoffbelag oder Verbundsysteme, die aus zwei Metallblechen mit einer Kunststoffzwischenschicht bestehen. Für viele Zwecke ist es vorteilhaft, diese Eigenschaften als Funktion von Temperatur und Frequenz zu bestimmen.

Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 3: Vibration en flexion - Méthode en résonance (ISO 6721-3:1994, Rectificatif Technique 1:1995 inclus)

La présente partie de l'ISO 6721 prescrit une méthode de vibration en flexion basée sur les courbes de résonance pour la détermination du module complexe en flexion E*fde plastiques homogènes et des propriétés d'amortissement de plastiques stratifiés spécialement destinés à l'isolation acoustique, par exemple des systèmes consistant en une feuille métallique revêtue d'une couche de plastique amortissant ou des systèmes en sandwichs consistant en deux feuilles métalliques avec une couche intermédiaire en plastique; pour beaucoup d'usages, il est utile de déterminer ces propriétés en fonction de la température et de la fréquence.

Polimerni materiali – Določevanje dinamičnih mehanskih lastnosti – 3. del: Upogibne vibracije – Metoda resonančne krivulje (ISO 6721-3:1994, vključno s tehničnim popravkom 1: 1995)

General Information

Status
Withdrawn
Publication Date
20-Feb-1996
Withdrawal Date
02-Mar-2021
ICS
83.080.01 - Plastics in general
Technical Committee
CEN/TC 249 - Plastics
Drafting Committee
CEN/TC 249/SC 1/WG 3 - Mechanical properties and preparation of test specimens
Current Stage
9960 - Withdrawal effective - Withdrawal
Completion Date
03-Mar-2021
Ref Project
SIST EN ISO 6721-3:1999 - Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration - Resonance-curve method (ISO 6721-3:1994, including Technical Corrigendum 1: 1995)

Relations

Replaced By
EN ISO 6721-3:2021 - Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration - Resonance-curve method (ISO 6721-3:2021)
Effective Date
10-Mar-2021

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EN ISO 6721-3:1999EN ISO 6721-3:1999
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SLOVENSKI STANDARD
SIST EN ISO 6721-3:1999
01-maj-1999
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8SRJLEQHYLEUDFLMH±0HWRGDUHVRQDQþQHNULYXOMH ,62YNOMXþQRV
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Plastics - Determination of dynamic mechanical properties - Part 3: Flexural vibration -
Resonance-curve method (ISO 6721-3:1994, including Technical Corrigendum 1: 1995)
Kunststoffe - Bestimmung dynamisch-mechanischer Eigenschaften - Teil 3:
Biegeschwingung - Resonanzkurven-Verfahren (ISO 6721-3:1994, einschließlich
Technische Korrektur 1:1995)
Plastiques - Détermination des propriétés mécaniques dynamiques - Partie 3: Vibration
en flexion - Méthode en résonance (ISO 6721-3:1994, Rectificatif Technique 1:1995
inclus)
Ta slovenski standard je istoveten z: EN ISO 6721-3:1996
ICS:
83.080.01 Polimerni materiali na Plastics in general
splošno
SIST EN ISO 6721-3:1999 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST EN ISO 6721-3:1999

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SIST EN ISO 6721-3:1999

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SIST EN ISO 6721-3:1999

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SIST EN ISO 6721-3:1999
INTERNATIONAL
ISO
STANDARD 6721-3
First edition
1994-11-01
Plastics - Determination of dynamic
mechanical properties -
Part 3:
- Resonance-curve method
Flexural Vibration
Plas tiques - Determination des propriktks mkaniques dynamiques -
Partie 3: Vibration en flexion - Methode en ksonance
Reference number
ISO 6721-3:1994(E)

---------------------- Page: 5 ----------------------

SIST EN ISO 6721-3:1999
ISO 6721=3:1994(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. Esch 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.
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.
International Standard ISO 6721-3 was prepared by Technical Committee
lSO/TC 61, Plastics, Subcommittee SC 2, Mechanical properties.
Together with ISO 6721-1, it cancels and replaces ISO 6721:1983, which
has been technically revised.
ISO 6721 consists of the following Parts, under the general title
Plas tics - Determination of dynamic mechanical properties:
- Part 7: General principles
- Part 2: Torsion-pendulum method
- Part 3: Flexural vibra tion - Resonance-curve method
- Part 4: Tensile Vibration - Non-resonance method
- Part 5: Flexural Vibration - Non-resonance method
- Part 6: Shear Vibration - Non-resonance method
- Part 7: Torsional Vibration - Non-resonance me thod
Annexes A and B of this part of ISO 6721 are for information only.
0 ISO 1994
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronrc or mechanical, inciuding photocopyrng and
microfilm, without permission In writing from the publisher.
lnternational Org anization fo r Standa rdization
20 l Switzerland
Case Postale 56 l CH-121 Geneve
Printed in Switzerland
ii

---------------------- Page: 6 ----------------------

SIST EN ISO 6721-3:1999
INTERNATIONAL STANDARD 0 ISO ISO 6721=3:1994(E)
- Determination of dynamic mechanical
Plastics
properties -
Part 3:
- Resonance-curve method
Flexural Vibration
NOTE 1 As stated in ISO 6721-1, frequencies derived
1 Scope
from resonance curves based on deformation-rate ampli-
tude measurements tan be exactly related to dynamic
This part of ISO 6721 specifies a bending-Vibration
properties. For the recommended range of the loss factor
method based upon resonance curves for determining
of this part of the International Standard, i.e. tan 6 < O,l,
the flexural complex modulus J!!?; of homogeneous
resonance curves based upon deformation amplitudes tan
plastics and the damping properties of laminated
also be used. For highly damping materials, see
ISO 6721-1 :1994, annex A.
plastics intended for acoustic insulation, for example
Systems consisting of a metal sheet coated with a
damping plastic layer, or sandwich Systems consisting
4 Principle
of two sheet-metal layers with an intermediate plastic
layer. For many purposes, it is useful to dete
...

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