ISO 11093-8:2012

Paper and board — Testing of cores — Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis

ISO 11093-8:2012 specifies a method for the determination of the flexural modulus by using experimentally measured natural frequencies in the free-free mode of transverse vibration of cylindrical paper and board cores.

Papier et carton — Essais des mandrins — Partie 8: Détermination de la fréquence propre et du module de flexion par analyse modale expérimentale

General Information

• Status: Withdrawn
• Publication Date: 30-Aug-2012
• Withdrawal Date: 30-Aug-2012
• ICS: 85.060 - Paper and board
• Technical Committee: ISO/TC 6 - Paper, board and pulps
• Drafting Committee: ISO/TC 6/WG 7 - Cores for reels of paper
• Current Stage: 9599 - Withdrawal of International Standard
• Completion Date: 15-Jun-2017

Relations

• Revised: ISO 11093-8:2017 - Paper and board — Testing of cores — Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis
• Effective Date: 10-Dec-2016
• Revises: ISO 11093-8:1997 - Paper and board — Testing of cores — Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis
• Effective Date: 06-Mar-2010

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 11093-8
Second edition
2012-09-01
Paper and board — Testing of cores —
Part 8:
Determination of natural frequency
and flexural modulus by experimental
modal analysis
Papier et carton — Essais des mandrins —
Partie 8: Détermination de la fréquence propre et du module de
flexion par analyse modale expérimentale
Reference number
ISO 11093-8:2012(E)
©
ISO 2012

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ISO 11093-8:2012(E)
COPYRIGHT PROTECTED DOCUMENT
© ISO 2012
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized in any form or by any
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ii © ISO 2012 – All rights reserved

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ISO 11093-8:2012(E)
Contents Page
Foreword .iv
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Principle . 2
5 Apparatus . 2
5.1 Test-piece suspension . 2
5.2 The experimental modal analysis system . 2
6 Test piece . 2
6.1 Sampling . 2
6.2 Test-piece size . 2
6.3 Conditioning . 3
7 Procedure. 5
8 Calculation . 5
8.1 Calculation of the flexural modulus . 5
8.2 Calculation of the rotational speed factor . 6
9 Test report . 6
Bibliography . 8
© ISO 2012 – All rights reserved iii

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ISO 11093-8:2012(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 11093-8 was prepared by Technical Committee ISO/TC 6, Paper, board and Pulps.
This second edition cancels and replaces the first edition (ISO 11093-8:1997), which has been
technically revised.
ISO 11093 consists of the following parts, under the general title Paper and board — Testing of cores:
— Part 1: Sampling
— Part 2: Conditioning of test samples
— Part 3: Determination of moisture content using the oven drying method
— Part 4: Measurement of dimensions
— Part 5: Determination of characteristics of concentric rotation
— Part 6: Determination of bending strength by the three-point method
— Part 7: Determination of flexural modulus by the three-point method
— Part 8: Determination of natural frequency and flexural modulus by experimental modal analysis
— Part 9: Determination of flat crush resistance
iv © ISO 2012 – All rights reserved

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INTERNATIONAL STANDARD ISO 11093-8:2012(E)
Paper and board — Testing of cores —
Part 8:
Determination of natural frequency and flexural modulus
by experimental modal analysis
1 Scope
This part of ISO 11093 specifies a method for the determination of the flexural modulus by using
experimentally measured natural frequencies in the free-free mode of transverse vibration of cylindrical
paper and board cores, which meet the following criteria:
—  internal diameter: 50 mm to 350 mm;
—  minimum wall thickness: 0,02 × internal diameter or not less than 2,0 mm;
—  minimu
...