EN ISO 14130:1997

SLOVENSKI STANDARD
01-maj-1999
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Fibre-reinforced plastic composites - Determination of apparent interlaminar shear
strength by short-beam method (ISO 14130:1997)
Faserverstärkte Kunststoffe - Bestimmung der scheinbaren interlaminaren
Scherfestigkeit nach dem Dreipunktverfahren mit kurzem Balken (ISO 14130:1997)
Composites plastiques renforcés de fibres - Détermination de la résistance au
cisaillement interlaminaire apparent par essai de flexion sur appuis rapprochés (ISO
14130:1997)
Ta slovenski standard je istoveten z: EN ISO 14130:1997
ICS:
83.120 2MDþDQLSROLPHUL Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

INTERNATIONAL ISO
STANDARD 14130
First edition
1997-12-15
Fibre-reinforced plastic composites —
Determination of apparent interlaminar
shear strength by short-beam method
Composites plastiques renforcés de fibres — Détermination de
la résistance au cisaillement interlaminaire apparent par essai de flexion
sur appuis rapprochés
A
Reference number
ISO 14130:1997(E)
ISO 14130:1997(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.
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 14130 was prepared by Technical Committee
ISO/TC 61, Plastics, Subcommittee SC 13, Composites and reinforcement
fibres.
It cancels and replaces International Standard ISO 4585:1989. The main
changes are as follows:
The scope of ISO 4585 has been extended to include all current and future
textile-diameter fibre-reinforced plastic composites which fail in the required
manner, with an additional requirement for a standard specimen thickness
of 2 mm. The 3 mm thick specimen is still available as an alternative using
the specimen scaling rules given in 6.1.2, but, although the test span at
15 mm is the same as previously, the width is now 15 mm (cf. 10 mm
previously).
©  ISO 1997
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced
or utilized in any form or by any means, electronic or mechanical, including photocopying and
microfilm, without permission in writing from the publisher.
International Organization for Standardization
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Printed in Switzerland
ii
©
INTERNATIONAL STANDARD  ISO ISO 14130:1997(E)
Fibre-reinforced plastic composites — Determination of apparent
interlaminar shear strength by short-beam method
1  Scope
1.1  This International Standard specifies a procedure for determining the apparent interlaminar shear strength of
fibre-reinforced plastic composites by the short-beam method.
1.2  The method is suitable for use with fibre-reinforced plastic composites with a thermoset or a thermoplastic
matrix, providing interlaminar shear failure is obtained.
NOTE —  When using other than laminated materials which are not symmetrical and balanced, the results may be affected by
various couplings such as extension/bending, bending/twisting, etc.
1.3  The method is not suitable for the determination of design parameters, but may be used for screening
materials, or as a quality-control test.
2  Normative references
The following standards contain provisions which, through reference in this text, constitute provisions of this
International Standard. At the time of publication, the editions indicated were valid. All standards are subject to
revision, and parties to agreements based on this International Standard are encouraged to investigate the
possibility of applying the most recent editions of the standards indicated below. Members of IEC and ISO maintain
registers of currently valid International Standards.
ISO 291:1997, Plastics — Standard atmospheres for conditioning and testing.
ISO 1268:1974, Plastics — Preparation of glass fibre reinforced, resin bonded, low-pressure laminated plates or
1)
panels for test purposes.
ISO 2602:1980, Statistical interpretation of test results — Estimation of the mean — Confidence interval.
ISO 2818:1994, Plastics — Preparation of test specimens by machining.
ISO 5893:1993, Rubber and plastics test equipment — Tensile, flexural and compression types (constant rate of
traverse) — Description.
____________
1)  Under revision.
©
ISO
ISO 14130:1997(E)
3  Principle
A bar of rectangular cross-section is loaded as a simple beam in flexure so that interlaminar shear failure occurs.
The bar rests on two supports and the load is applied by means of a loading member midway between the supports.
NOTES
1  The test is similar in nature to the three-point loading method used to determine the flexural properties of plastics
(ISO 14125, Fibre-reinforced plastic composites — Determination of flexural properties). However, a smaller test span/specimen
thickness ratio is adopted to increase the level of shear stress relative to the flexural stress in the test specimen to encourage
interlaminar shear failure.
2  It is emphasized that the result obtained is not an absolute value. For this reason the term “apparent interlaminar shear
strength” is used to define the quantity measured. Test results from different-sized specimens, or from specimens tested under
different conditions, are not directly comparable.
4  Definitions
For the purposes of this International Standard, the following definitions apply:
4.1  apparent interlaminar shear stress, t: The interlaminar shear stress acting on the neutral plane of the
specimen.
It is calculated from the relationship given in 10.1 and is expressed in megapascals (MPa).
4.2  apparent interlaminar shear strength, t : The value of the apparent interlaminar shear stress at failure or
M
when the load reaches a maximum value.
It is expressed in megapascals (MPa).
4.3  span, L: The distance between the two specimen supports in the test machine.
It is expressed in millimetres (mm).
4.4  specimen coordinate axes (for aligned materials): The coordinate axes for the material under test are
defined in figure 1. The direction parallel to the fibre axes is defined as the “1” direction and the direction
perpendicular to it the “2” direction.
For other materials, the 1, 2 and 3 directions are generally described by the x, y, z system of coordinates.
NOTES
1  The “1” direction is also referred to as the 0 degree (0�) or longitudinal direction, and the “2” direction as the 90 degree (90�)
or transverse direction.
2  A similar definition can be used for material with a preferred fibre lay-up or in cases where a direction (e.g. the lengthwise
direction) can be related to the production process (i.e. directions A and B in figure 3).
5  Apparatus
5.1  Test machine
5.1.1  General
The machine shall conform to ISO 5893 as appropriate to the requirements given in 5.1.2 and 5.1.3.
©
ISO
ISO 14130:1997(E)
Figure 1 — Unidirectional reinforced composite
plate element showing symmetry axes
5.1.2  Spee
...