EN ISO 14126:2023
(Main)Fibre-reinforced plastic composites - Determination of compressive properties in the in-plane direction (ISO 14126:2023)
Fibre-reinforced plastic composites - Determination of compressive properties in the in-plane direction (ISO 14126:2023)
1.1 This document specifies methods for determining the compressive properties, in directions
parallel to the plane of lamination, of fibre-reinforced plastic composites, based on thermosetting or
thermoplastic matrices. The compressive properties are of interest for specifications and qualitycontrol
purposes. The test specimens are machined from a flat test plate, or from suitable finished or
semi-finished products.
1.2 Two loading methods and two types of specimen are described.
The loading methods are:
— Method 1: provides shear loading of the specimen (gauge length unsupported)
— Method 2: provides combined loading of the specimen (gauge length unsupported)
NOTE For tabbed specimens loaded using method 2, load is transferred through a combination of endloading
and shear-loading through the tabs.
The specimen designs are:
— Type A specimen: rectangular cross-section, fixed thickness, end-tabbed (mainly for aerospace
style preimpregnates (~ 0,125 mm ply thickness)
— Type B specimen: rectangular cross-section, range of thicknesses, untabbed or end-tabbed, two
specimen sizes are available (B1 and B2).
The Type A specimen is used for unidirectionally or biaxially reinforced materials tested in the
fibre direction, where the fibres are normally either aligned continuous or aligned long (>7,5 mm)
discontinuous. The Type B1 and B2 specimens are used for multi-directional aligned; mat, fabric and
other multi-directionally reinforced materials where the fibre structure is more complex and/or
coarser.
1.3 This document gives criteria for checking that the combination of test method and specimen
design result in valid failures. It is noted that alternative test method/specimen combinations will not
necessarily give the same result.
1.4 The methods specify required dimensions for the specimen. Tests carried out on specimens of
other dimensions, or on specimens that are prepared under different conditions, can produce results
that are not comparable. Other factors, such as the speed of testing, the support fixture used and the
conditioning of the specimens, can influence the results.
Faserverstärkte Kunststoffe - Bestimmung der Druckeigenschaften in der Laminatebene (ISO 14126:2023)
Dieses Dokument legt Verfahren zur Bestimmung der Druckeigenschaften parallel zur Laminierungsebene von faserverstärkten Kunststoffen auf der Grundlage von duroplastischen oder thermoplastischen Matrizen fest. Die Druckeigenschaften sind für Spezifikationen und für die Qualitätskontrolle von Interesse. Die Probekörper werden aus einer flachen Prüfplatte oder aus geeigneten Fertig- oder Halbfertigprodukten hergestellt.
1.2 Zwei Prüfverfahren zur Beanspruchung und zwei Probekörper-Typen werden beschrieben.
Die Verfahren zur Beanspruchung sind:
Verfahren 1: Scherbeanspruchung des Probekörpers (Einspannlänge nicht unterstützt),
Verfahren 2: kombinierte Beanspruchung des Probekörpers (Einspannlänge nicht unterstützt),
ANMERKUNG Bei Probekörpern mit Aufleimern, die nach Verfahren 2 beansprucht werden, erfolgt eine Krafteinleitung durch eine Kombination aus Stirnflächenbeanspruchung und Scherbelastung über die Aufleimer.
Die Probekörperauslegungen sind:
Probekörper Typ A: rechteckiger Querschnitt, feststehende Dicke, mit Aufleimern (hauptsächlich für Vorimprägnierungen für die Luft- und Raumfahrt (~ 0,125 mm Lagendicke);
Probekörper Typ B: rechteckiger Querschnitt, unterschiedliche Dicken, mit Aufleimern oder ohne Aufleimer, zwei Probekörpergrößen sind verfügbar (B1 und B2).
Der Probekörper vom Typ A wird für unidirektional oder biaxial verstärkte Werkstoffe verwendet, die parallel zur Faserrichtung geprüft werden, wobei die Fasern normalerweise entweder durchgehend oder lang (> 7,5 mm) diskontinuierlich ausgerichtet sind. Probekörper vom Typ B1 und Typ B2 werden für multidirektional ausgerichtete Matten, Gewebe und andere multidirektional verstärkte Werkstoffe verwendet, bei denen die Faserstruktur komplexer und/oder gröber ist.
1.3 Dieses Dokument enthält Kriterien, mit denen überprüft werden kann, ob die Kombination aus Prüfverfahren und Probekörperauslegung zu gültigen Fehlern führt. Es wird darauf hingewiesen, dass alternative Prüfverfahren/Probekörperkombinationen nicht notwendigerweise zu demselben Ergebnis führen.
1.4 Die Verfahren legen geforderte Maße für die Probekörper fest. Prüfungen an Probekörpern mit davon abweichenden Maßen oder nach anderen Verfahren hergestellt, können zu Ergebnissen führen, die nicht vergleichbar sind. Andere Faktoren, wie die Prüfgeschwindigkeit, die verwendete Stützeinrichtung oder die Vorbehandlung der Probekörper, können die Ergebnisse beeinflussen.
Composites plastiques renforcés de fibres - Détermination des caractéristiques en compression dans le plan (ISO 14126:2023)
Z vlakni ojačeni polimerni kompoziti - Ugotavljanje tlačnih lastnosti v ravnini laminiranja (ISO 14126:2023)
1.1 Ta dokument določa metode za določanje tlačnih lastnosti z vlakni ojačanih polimernih kompozitov v smeri, vzporedni z ravnino laminiranja, na podlagi termoplastičnih ali termoreaktivnih matric. Tlačne lastnosti so uporabne za namene razvrščanja in nadzora
kakovosti. Preskusni vzorci so strojno izdelani iz ravne preskusne plošče ali iz ustreznih končnih izdelkov ali polizdelkov.
1.2 Opisani sta dve metodi obremenitve in dve vrsti preskusnega vzorca.
Omenjeni metodi obremenitve sta:
– metoda 1: zagotavlja strižno obtežbo vzorca (merilna dolžina ni podprta);
– metoda 2: zagotavlja kombinirano obremenitev vzorca (merilna dolžina ni podprta).
OPOMBA: Pri vzorcih z jezički, obremenjenih z uporabo metode 2, se obremenitev prenese s kombinacijo obremenitve zadnjega dela in strižne obtežbe prek jezičkov.
Omenjeni zasnovi vzorcev sta:
– vzorec tipa A: kvadratni presek, fiksna debelina, z jezički na zadnjem delu (predvsem za predhodno impregnirane vzorce, ki se uporabljajo v aeronavtiki (debelina sloja ~ 0,125 mm));
– vzorec tipa B: kvadratni presek, različne debeline, brez jezičkov ali z jezički na zadnjem delu, na voljo sta dve velikosti vzorca (B1 in B2).
Vzorec tipa A se uporablja za enosmerno ali dvoosno ojačane materiale, preskušene v smeri vlaken, pri katerih je poravnava vlaken običajno izvedena neprekinjeno ali dolgo (>7,5 mm) prekinjeno. Vzorci tipov B1 in B2 se uporabljajo za materiale z večsmerno poravnavo, kot so mati, tkanine in drugi materiali z večsmerno ojačitvijo, pri katerih je struktura vlaken kompleksnejša in/ali bolj groba.
1.3 Ta dokument podaja merila, s katerimi se preverja, ali kombinacija preskusne metode in zasnove vzorca povzroči veljavne napake. Opozoriti je treba, da alternativne kombinacije preskusne metode/vzorca ne bodo dale nujno enakega rezultata.
1.4 Metode določajo zahtevane dimenzije vzorcev. Preskusi, ki se opravljajo na preskusnih vzorcih drugih velikosti ali tistih, ki so pripravljeni pod drugačnimi pogoji, lahko dajo rezultate, ki niso primerljivi. Na rezultate lahko vplivajo tudi drugi dejavniki, kot so hitrost preskušanja, podporna oprema in priprava vzorcev.
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
01-december-2023
Z vlakni ojačeni polimerni kompoziti - Ugotavljanje tlačnih lastnosti v ravnini
laminiranja (ISO 14126:2023)
Fibre-reinforced plastic composites - Determination of compressive properties in the in-
plane direction (ISO 14126:2023)
Faserverstärkte Kunststoffe - Bestimmung der Druckeigenschaften in der Laminatebene
(ISO 14126:2023)
Composites plastiques renforcés de fibres - Détermination des caractéristiques en
compression dans le plan (ISO 14126:2023)
Ta slovenski standard je istoveten z: EN ISO 14126:2023
ICS:
83.120 Ojačani polimeri Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
EN ISO 14126
EUROPEAN STANDARD
NORME EUROPÉENNE
October 2023
EUROPÄISCHE NORM
ICS 83.120 Supersedes EN ISO 14126:1999, EN ISO
14126:1999/AC:2002
English Version
Fibre-reinforced plastic composites - Determination of
compressive properties in the in-plane direction (ISO
14126:2023)
Composites plastiques renforcés de fibres - Faserverstärkte Kunststoffe - Bestimmung der
Détermination des caractéristiques en compression Druckeigenschaften in der Laminatebene (ISO
dans le plan (ISO 14126:2023) 14126:2023)
This European Standard was approved by CEN on 5 October 2023.
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, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway,
Poland, Portugal, Republic of North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and
United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION
EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2023 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN ISO 14126:2023 E
worldwide for CEN national Members.
Contents Page
European foreword . 3
European foreword
This document (EN ISO 14126:2023) has been prepared by Technical Committee ISO/TC 61 "Plastics"
in collaboration with Technical Committee CEN/TC 249 “Plastics” the secretariat of which is held by SIS.
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 2024, and conflicting national standards shall be
withdrawn at the latest by April 2024.
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.
This document supersedes EN ISO 14126:1999, EN ISO 14126:1999/AC:2002.
Any feedback and questions on this document should be directed to the users’ national standards
body/national committee. A complete listing of these bodies can be found on the CEN website.
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, France, Germany, Greece, Hungary, Iceland,
Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Republic of
North Macedonia, Romania, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Türkiye and the
United Kingdom.
Endorsement notice
The text of ISO 14126:2023 has been approved by CEN as EN ISO 14126:2023 without any modification.
INTERNATIONAL ISO
STANDARD 14126
Second edition
2023-10
Fibre-reinforced plastic composites —
Determination of compressive
properties in the in-plane direction
Composites plastiques renforcés de fibres — Détermination des
caractéristiques en compression dans le plan
Reference number
ISO 14126:2023(E)
ISO 14126:2023(E)
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
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Published in Switzerland
ii
ISO 14126:2023(E)
Contents Page
Foreword .v
Introduction . vi
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 2
4 Principle . 3
5 Apparatus . 4
5.1 Test machine . 4
5.1.1 General . 4
5.1.2 Speed of testing . 4
5.1.3 Load measurement . 4
5.2 Strain measurement . 4
5.3 Micrometer . 5
5.4 Loading fixtures . 5
5.4.1 General . 5
5.4.2 Method 1: Shear loading . 5
5.4.3 Method 2: Combined loading . 7
6 Test specimens . 8
6.1 Shape and dimensions . 8
6.1.1 Type A specimen . 8
6.1.2 Type B specimen . 9
6.2 Preparation . 10
6.2.1 General . 10
6.2.2 End-tab material . 10
6.2.3 Application of end tabs to specimens . 10
6.2.4 Machining the specimens . 10
6.3 Checking specimen quality . . 10
6.4 Anisotropy . 11
7 Number of test specimens .11
8 Conditioning .11
9 Procedures .11
10 Expression of results .13
10.1 Compressive strength calculation . 13
10.2 Compressive modulus calculation. 13
10.3 Compressive failure strain calculation . 14
10.4 Statistical parameters. 14
10.5 Significant figures. 14
11 Precision .14
12 Test report .15
Annex A (normative) Alignment of specimen and loading train .16
Annex B (normative) Specimen preparation .17
Annex C (informative) Compression fixtures for method 1 .19
Annex D (informative) Compression fixtures for method 2 .21
Annex E (informative) Euler buckling criteria .25
Annex F (informati
...
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