Aerospace series - Carbon fibre thermosetting resin - Unidirectional laminates - Compression test parallel to fibre direction

This European Standard defines a method for the determination of stress at failure and Young's modulus in compression of carbon thermosetting resin unidirectional laminates.
The method only covers test pieces the axis of which is parallel to the fibre direction.
This method covers fibres (or fabrics) other than carbon, when the relevant technical specification explicitly mentions it.

Luft- und Raumfahrt - Unidirektionale Laminate aus Kohlenstoffasern und Reaktionsharz - Druckversuch parallel zur Faserrichtung

Série aérospatiale - Fibres de carbone/résine thermodurcissable - Stratifiés unidirectionnels - Essai de compression parallèlement au sens des fibres

Aeronavtika - Laminati iz termično utrjenih smol z enosmerno urejenimi ogljikovimi vlakni - Preskus s stiskanjem v smeri, vzporedni z vlakni

Ta evropski standard opredeljuje metodo za ugotavljanje obremenitve pri okvari in Youngov modul pri stiskanju laminatov iz termično utrjenih smol z enosmerno urejenimi ogljikovimi vlakni.
Metoda zajema samo preskušance, katerih os je vzporedna s smerjo vlaken.
Ta metoda zajema vse vlakna (ali tkanine) razen ogljikovih, kadar je to izrecno navedeno v ustrezni tehnični specifikaciji.

General Information

Status
Published
Publication Date
17-Oct-2017
Technical Committee
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Due Date
18-Oct-2017
Completion Date
18-Oct-2017

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EN 2850:2018
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2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.HQLPLDNQLLuft- und Raumfahrt - Duroplast Verbundwerkstoffe - Unidirektionale Kohlenstoffaser - Druckversuch parallel zur FaserrichtungSérie aérospatiale - Fibres de carbone/résine thermodurcissable - Stratifiés unidirectionnels - Essai de compression parallèlement au sens des fibresAerospace series - Carbon fibre thermosetting resin unidirectional laminates - Compression test parallel to fibre direction49.025.40Guma in polimerni materialiRubber and plasticsICS:Ta slovenski standard je istoveten z:EN 2850:2017SIST EN 2850:2018en,fr,de01-februar-2018SIST EN 2850:2018SLOVENSKI

STANDARD
SIST EN 2850:2018
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 2850
October
t r s y ICS
v {ä r t wä v r English Version

Aerospace series æ Carbon fibre thermosetting resin æ Unidirectional laminates æ Compression test parallel to fibre direction thermodurcissable æ Stratifiés unidirectionnels æ Essai de compression parallèlement au sens des fibres

Luftæ und Raumfahrt æ Unidirektionale Laminate aus Kohlenstoffasern und Reaktionsharz æ Druckversuch parallel zur Faserrichtung This European Standard was approved by CEN on

t x June
t r s yä

egulations which stipulate the conditions for giving this European Standard the status of a national standard without any alterationä Upætoædate lists and bibliographical references concerning such national standards may be obtained on application to the CENæCENELEC Management Centre or to any CEN memberä

translation under the responsibility of a CEN member into its own language and notified to the CENæCENELEC Management Centre has the same status as the official versionsä

CEN members are the national standards bodies of Austriaá Belgiumá Bulgariaá Croatiaá Cyprusá Czech Republicá Denmarká Estoniaá Finlandá Former Yugoslav Republic of Macedoniaá Franceá Germanyá Greeceá Hungaryá Icelandá Irelandá Italyá Latviaá Lithuaniaá Luxembourgá Maltaá Netherlandsá Norwayá Polandá Portugalá Romaniaá Serbiaá Slovakiaá Sloveniaá Spainá Swedená Switzerlandá Turkey and United Kingdomä

EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG

CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels

t r s y CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Membersä Refä Noä EN

t z w rã t r s y ESIST EN 2850:2018

EN 2850:2017 (E) 2 Contents Page European foreword ...................................................................................................................................................... 3 1 Scope .................................................................................................................................................................... 4 2 Normative references .................................................................................................................................... 4 3 Principle of the method ................................................................................................................................ 5 4 Terms and definitions ................................................................................................................................... 5 5 Designation ....................................................................................................................................................... 6 6 Test pieces ......................................................................................................................................................... 6 7 Apparatus........................................................................................................................................................... 8 8 Conditioning...................................................................................................................................................... 8 9 Procedure .......................................................................................................................................................... 8 10 Calculation of results ..................................................................................................................................... 9 11 Validity .............................................................................................................................................................. 11 12 Test report ....................................................................................................................................................... 12 Annex A (normative) .................................................................................................................................................. 13 Annex B (normative) .................................................................................................................................................. 15 Annex C (informative) ............................................................................................................................................... 16

SIST EN 2850:2018

EN 2850:2017 (E) 3 European foreword This document (EN 2850:2017) 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 April 2018, and conflicting national standards shall be withdrawn at the latest by April 2018. 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. 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. SIST EN 2850:2018

EN 2850:2017 (E) 4 1 Scope This European Standard defines a method for the determination of stress at failure and Young's modulus in compression of carbon thermosetting resin unidirectional laminates. The method only covers test pieces the axis of which is parallel to the fibre direction. This method covers fibres (or fabrics) other than carbon, when the relevant technical specification explicitly mentions it. 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 2372 1), Nuts, hexagon, thin, steel, cadmium plated — Classification: 1 100 MPa/235 °C — Aerospace series 2) EN 2489, Aerospace series — Fibre reinforced plastics — Determination of the action of test fluids EN 2565, Aerospace series — Preparation of carbon fibre reinforced resin panels for test purposes 3) 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 2823, Aerospace series — Fibre reinforced plastics — Determination of the effect of exposure to humid atmosphere on physical and mechanical characteristics 3) EN 2859, Aerospace series — Bolts, normal hexagonal head, close tolerance normal shank, short thread, in alloy steel, cadmium plated, metric series — Classification: 1 100 MPa (at ambient temperature) / 235 °C EN 3228, Aerospace series — Nuts, hexagonal, plain, reduced height, normal across flats, in steel, cadmium plated — Classification: 900 MPa (at ambient temperature) / 235 °C EN 3783, Aerospace series — Fibre composite materials — Normalisation of fibre dominated mechanical properties

1) Inactive for new design, see prEN 3228.

2) Published as ASD-STAN Standard at the date of publication of this standard by AeroSpace and Defence industries Association of Europe - Standardization (ASD-STAN) (www.asd-stan.org) 3) 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) SIST EN 2850:2018

EN 2850:2017 (E) 5 3 Principle of the method The method consists in recording and measuring the longitudinal strain of the material as a function of the applied load during a compression test carried out at a constant rate until failure. The load applied to the material may be introduced in two different ways:  either mainly in shear through co-cured or bonded tabs (Method A);  or exclusively in compression by direct end loading of the test piece (Method B). It is important to note that the test results obtained using different test pieces are not comparable. 4 Terms and definitions For the purposes of this document, the following terms and definitions apply. 4.1 compression stress at any point in time during the test (σc)=compression load per initial unit cross-sectional area in the gauge length sustained by the test piece at any point in time during the test 4.2 compression stress at failure (σc11)=compression stress at the moment of failure Note 1 to entry: It is calculated using the formula given in 10.1. 4.3 strain (ε11)=change in the distance between reference points within the gauge length of the test piece produced by a compression load expressed in relation to the original distance between these points Note 1 to entry: ε11 is the strain measured parallel to the fibre axis. 4.4 secant compression modulus two methods of calculation are possible Note 1 to entry: The one based on strain shall be preferred. Note 2 to entry: Otherwise, the one based on the for

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