EN 2823:2017

SLOVENSKI STANDARD
01-maj-2017
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Aerospace series - Fibre reinforced plastics - Determination of the effect of exposure to
humid atmosphere on physical and mechanical characteristics
Luft- und Raumfahrt - Faserverstärkte Kunststoffe - Ermittlung des Einflusses der
Auslagerung in feuchtem Klima auf die mechanischen und physikalischen Eigenschaften
Série aérospatiale - Plastiques renforcés de fibres - Détermination de l'influence de
l'exposition à l'atmosphère humide sur les caractéristiques mécaniques et physiques
Ta slovenski standard je istoveten z: EN 2823:2017
ICS:
49.025.40 Guma in polimerni materiali Rubber and plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 2823
EUROPEAN STANDARD
NORME EUROPÉENNE
March 2017
EUROPÄISCHE NORM
ICS 49.025.40
English Version
Aerospace series - Fibre reinforced plastics -
Determination of the effect of exposure to humid
atmosphere on physical and mechanical characteristics
Série aérospatiale - Plastiques renforcés de fibres - Luft- und Raumfahrt - Faserverstärkte Kunststoffe -
Détermination de l'influence de l'exposition à Ermittlung des Einflusses der Auslagerung in feuchtem
l'atmosphère humide sur les caractéristiques Klima auf die mechanischen und physikalischen
mécaniques et physiques Eigenschaften
This European Standard was approved by CEN on 6 February 2017.

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.

CEN members are the national standards bodies of 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 United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION

EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2017 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 2823:2017 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Methodology . 5
5 Apparatus. 5
6 Specimens . 5
7 Procedure . 7
8 Expression of results. 10
9 Designation . 11
10 Test report . 11

European foreword
This document (EN 2823:2017) has been prepared by the Aerospace and Defence Industries Association
of Europe - Standardization (ASD-STAN).
After enquiries and votes carried out in accordance with the rules of this Association, this Standard has
received the approval of the National Associations and the Official Services of the member countries of
ASD, prior to its presentation to CEN.
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 September 2017, and conflicting national standards shall
be withdrawn at the latest by September 2017.
Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CEN [and/or CENELEC] shall not be held responsible for identifying any or all such patent
rights.
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.
1 Scope
This European Standard specifies the method for determining the effect of exposure to a humid
atmosphere on the physical and mechanical characteristics of fibre reinforced plastics.
This standard applies to all laminates, whatever the nature of the reinforcement and organic matrix used,
unless otherwise indicated in the material standard and/or technical specification.
2 Normative references
The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.
EN 2743, Aerospace series — Fibre reinforced plastics — Standard procedures for conditioning prior to
testing unaged materials
EN 2744, Aerospace series — Non-metallic materials — Preferred test temperatures
EN 3615, Aerospace series — Fibre reinforced plastics — Determination of the conditions of exposure to
1)
humid atmosphere and moisture absorption
3 Terms and definitions
For the purposes of this document, the following terms and definitions apply.
3.1
"pilot" specimens
specimens intended to establish the exposure temperature required to achieve an equilibrium condition
at the specified humidity level in a limited period of time
3.2
specimens "to be aged"
specimens intended to determine the mechanical and physical characteristics after exposure
3.3
"traveller" specimens
specimens representative of specimens "to be aged" which accompany these in the climatic chamber and
are intended to monitor moisture absorption
3.4
equilibrium condition
condition of the material at a specified hygrometry when it has reached constant mass
3.5
constant mass
mass of the specimen obtained after several successive weighings carried out at regular intervals when
the difference between weighings is less than a specified value

1) Published as ASD-STAN Prestandard at the date of publication of this standard by AeroSpace and Defence
industries Association of Europe - Standardization (ASD-STAN) (www.asd-stan.org)
3.6
as-cured condition
see EN 2743
4 Methodology
The test results obtained with the specimens in the as-cured condition are compared with those obtained
with specimens "to be aged" after exposure to the specified humid atmosphere, in accordance with the
following procedure:
a) carry out the mechanical or physical test according to the appropriate standard on specimens in the
as-cured condition (see EN 2743A);
b) using pilot specimens determine the highest possible exposure temperature guaranteeing a
behaviour of the material in conformity with Fick's law (reaching an equilibrium condition).
This determination shall be carried out at least once for each case of fibre/resin/temperature
combination;
c) expose the specimens "to be aged" to the specified hygrometry and to the temperature as determined
above until they reach the equilibrium condition. Traveller specimens shall be permanently
subjected to the same exposure conditions;
d) carry out the mechanical or physical tests according to the applicable standards.
NOTE 1 In the preparation of this standard both Langmuir model and Fick's law were considered. While
acknowledging that Langmuir Models more exact, Fick's law will be used to define equilibrium conditions in
composite materials.
A temperature of 70 °C is chosen as the initial verification temperature in orde
...