Aerospace series - Carbon fibre reinforced plastics - Test method - Determination of interlaminar fracture toughness energy - Mode I - GIC

This standard specifies the procedure to determine the mode I interlaminar fracture toughness energy GIC of carbon fibre composites manufactured from unidirectional tape or woven fabric.
This standard does not give any directions necessary to meet health and safety requirements. It is the responsibility of the user of this standard to consult and establish appropriate health and safety precautions.

Luft- und Raumfahrt - Kohlenstofffaserverstärkte Kunststoffe - Prüfverfahren - Bestimmung der interlaminaren Energiefreisetzungsrate - Mode I - GIC

Diese Norm legt das Verfahren zur Bestimmung der interlaminaren Energiefreisetzungsrate GIC, Mode I, von kohlenstofffaserverstärkten Kunststoffen fest, die aus gleichgerichtetem Band oder Gewebe hergestellt wurden.
Diese Norm legt keine Anleitung fest, die für das Einhalten der Gesundheits  und Sicherheitsvorschriften erforderlich ist. Es liegt in der Verantwortung des Anwenders dieser Norm, die entsprechenden Gesundheits- und Sicherheitsvorkehrungen zu treffen.

Série aérospatiale - Matières plastiques renforcées de fibres de carbone - Méthode d'essai - Détermination de l'énergie de ténacité en rupture interlaminaire - Mode I - GIC

La présente norme spécifie la procédure pour la détermination de l’énergie de ténacité en rupture interlaminaire, mode I, GIC, des composites de fibres de carbone fabriqués à base de bandes ou de fibres textiles unidirectionnelles. La présente norme ne fournit pas d'indication nécessaire pour satisfaire les exigences d'hygiène et de sécurité. Il est de la responsabilité de l’utilisateur de la présente norme de consulter et de mettre en place les précautions d'hygiène et de sécurité appropriées.

Aeronavtika - Z ogljikovimi vlakni ojačeni polimerni materiali - Preskusna metoda - Ugotavljanje energije pri medplastni lomni žilavosti - Način I - GIC

Ta standard določa postopek za ugotavljanje energije GIC pri medplastni lomni žilavosti v okviru načina I za kompozite iz ogljikovih vlaken, izdelane iz enosmernega traku ali z vlakni ojačenega materiala.
Ta standard ne vsebuje nobenih smernic, potrebnih za izpolnjevanje zdravstvenih in varnostnih zahtev. Uporabnik tega standarda se mora posvetovati in določiti ustrezne zdravstvene in varnostne ukrepe.

General Information

Status
Published
Publication Date
24-Nov-2015
Withdrawal Date
30-May-2016
Technical Committee
ASD-STAN - Aerospace
Drafting Committee
ASD-STAN/D 4 - Metallic
Current Stage
6060 - Definitive text made available (DAV) - Publishing
Start Date
25-Nov-2015
Completion Date
25-Nov-2015

Relations

Effective Date
28-Jan-2026
Effective Date
28-Jan-2026
Effective Date
28-Jan-2026

Overview

EN 6033:2015 is a European standard developed by CEN that specifies a precise test method for determining the mode I interlaminar fracture toughness energy (G_IC) of carbon fibre reinforced plastics (CFRP) used in aerospace applications. This standard focuses on composites manufactured from unidirectional tape or woven fabric, providing a consistent procedure for evaluating their resistance to crack growth between layers under peel (Mode I) loading. It is essential for assessing the structural integrity and durability of advanced aerospace materials.

Key Features:

  • Applicable to carbon fibre composites from unidirectional tape or woven fabric.
  • Defines procedure to measure interlaminar fracture toughness energy (G_IC).
  • Specifies specimen preparation, test setup, load application, and data analysis.
  • Includes formulas and guidelines for accurate calculation of fracture toughness energy.
  • Focuses on Mode I crack propagation, where peel forces open the interlaminar crack.
  • Scope excludes health and safety directives - users must ensure compliance independently.

Key Topics

1. Test Methodology

The standard outlines a detailed procedure including:

  • Preparation of precracked specimens with a mid-plane release film acting as an initial crack.
  • Loading specimens in tensile testing machines with strict accuracy and alignment criteria.
  • Continuous loading at 10 mm/min crosshead speed until approximately 100 mm crack propagation.
  • Recording load and crosshead displacement data throughout crack growth for energy calculation.

2. Specimen Preparation

  • Specimens are cut from flat laminates prepared according to EN 2565.
  • Use of metallic tabs bonded with high peel strength adhesive to prevent premature failure.
  • Thickness and fiber orientation must conform to specified dimensions (e.g., 25 mm width, 3 mm thickness).
  • Special considerations for woven fabrics include controlling crack positioning between layers to ensure test repeatability.

3. Data Analysis and Results

  • G_IC is calculated by integrating the load-displacement curve to obtain the energy absorbed during crack propagation.
  • Formula:
    G_IC = (A × 10^6) / (a × w)
    where A is energy (J), a is propagated crack length (mm), and w is specimen width (mm).
  • Detailed reporting requirements include material identification, specimen data, test conditions, and normalized curves.
  • Effects such as fibre bridging or crack migration within the laminate must be documented.

4. Apparatus and Equipment

  • High-precision tensile testing machine with less than 1% load error.
  • Microscope for accurate crack length measurement.
  • Release films (e.g., PTFE foil) to control initial crack position.
  • Calipers for specimen dimension measurement.

Applications

EN 6033:2015 is vital in the aerospace industry for:

  • Material qualification and certification of aerospace-grade carbon fibre composites.
  • Quality control during CFRP manufacturing processes.
  • Ensuring structural reliability and safety in aircraft and spacecraft by evaluating resistance to delamination.
  • Facilitating research and development of new composite materials with enhanced fracture toughness.
  • Providing consistency in test results across laboratories and manufacturers within the aerospace supply chain.

By standardizing the test for interlaminar fracture toughness energy (Mode I), this document supports the design of more damage-tolerant, lightweight composite structures critical for advanced aerospace technologies.

Related Standards

For a comprehensive understanding and application of composite testing, EN 6033:2015 is commonly used alongside these related standards:

  • EN 2565 – Aerospace series: Preparation of carbon fibre reinforced resin panels for test purposes.
  • EN 2743 – Aerospace series: Fibre reinforced plastics conditioning prior to testing.
  • EN 6034 – Aerospace series: Test method for determination of interlaminar fracture toughness energy – Mode II (G_IIC).
  • ASD-STAN publications on composite materials and mechanical testing methods.

These complementary standards ensure thorough evaluation of CFRP materials across different fracture modes and environmental conditions, supporting robust aerospace material qualification protocols.


Keywords: EN 6033:2015, aerospace standard, carbon fibre reinforced plastics, CFRP, interlaminar fracture toughness, Mode I fracture, G_IC, composite testing method, fracture toughness energy, aerospace materials testing, fiber composites, laminate delamination, test procedure, toughness measurement

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Frequently Asked Questions

EN 6033:2015 is a standard published by the European Committee for Standardization (CEN). Its full title is "Aerospace series - Carbon fibre reinforced plastics - Test method - Determination of interlaminar fracture toughness energy - Mode I - GIC". This standard covers: This standard specifies the procedure to determine the mode I interlaminar fracture toughness energy GIC of carbon fibre composites manufactured from unidirectional tape or woven fabric. This standard does not give any directions necessary to meet health and safety requirements. It is the responsibility of the user of this standard to consult and establish appropriate health and safety precautions.

This standard specifies the procedure to determine the mode I interlaminar fracture toughness energy GIC of carbon fibre composites manufactured from unidirectional tape or woven fabric. This standard does not give any directions necessary to meet health and safety requirements. It is the responsibility of the user of this standard to consult and establish appropriate health and safety precautions.

EN 6033:2015 is classified under the following ICS (International Classification for Standards) categories: 49.025.40 - Rubber and plastics. The ICS classification helps identify the subject area and facilitates finding related standards.

EN 6033:2015 has the following relationships with other standards: It is inter standard links to EN 6034:2015, EN 2743:2001, EN 2565:2013. Understanding these relationships helps ensure you are using the most current and applicable version of the standard.

EN 6033:2015 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


SLOVENSKI STANDARD
01-februar-2016
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8JRWDYOMDQMHHQHUJLMHSULPHGSODVWQLORPQLåLODYRVWL1DþLQ,*,&
Aerospace series - Carbon fibre reinforced plastics - Test method - Determination of
interlaminar fracture toughness energy - Mode I - GIC
Luft- und Raumfahrt - Kohlenstoffaserverstärkte Kunststoffe - Prüfverfahren -
Bestimmung der interlaminaren Energiefreisetzungsrate - Mode I - GIC
Série aérospatiale - Matières plastiques renforcées de fibres de carbone - Méthode
d'essai - Détermination de l'énergie de ténacité en rupture interlaminaire - Mode I - GIC
Ta slovenski standard je istoveten z: EN 6033:2015
ICS:
49.025.40 Guma in polimerni materiali Rubber and plastics
83.120 2MDþDQLSROLPHUL Reinforced plastics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EN 6033
EUROPEAN STANDARD
NORME EUROPÉENNE
November 2015
EUROPÄISCHE NORM
ICS 49.025.40
English Version
Aerospace series - Carbon fibre reinforced plastics - Test
method - Determination of interlaminar fracture
toughness energy - Mode I - GIC
Série aérospatiale - Matières plastiques renforcées de Luft- und Raumfahrt - Kohlenstoffaserverstärkte
fibres de carbone - Méthode d'essai - Détermination de Kunststoffe - Prüfverfahren - Bestimmung der
l'énergie de ténacité en rupture interlaminaire - Mode I interlaminaren Energiefreisetzungsrate - Mode I - GIC
- GIC
This European Standard was approved by CEN on 10 August 2013.

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, 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
© 2015 CEN All rights of exploitation in any form and by any means reserved Ref. No. EN 6033:2015 E
worldwide for CEN national Members.

Contents Page
European foreword . 3
1 Scope . 4
2 Normative references . 4
3 Terms and definitions . 4
4 Principle of the method . 4
5 Designation of the method . 5
6 Apparatus . 5
7 Test specimen . 5
8 Procedure. 6
9 Presentation of the results . 7
10 Test report . 7
European foreword
This document (EN 6033:2015) 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 May 2016, and conflicting national standards shall be
withdrawn at the latest by May 2016.
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, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.
1 Scope
This standard specifies the procedure to determine the mode I interlaminar fracture toughness energy
G of carbon fibre composites manufactured from unidirectional tape or woven fabric.
IC
This standard does not give any directions necessary to meet health and safety requirements. It is the
responsibility of the user of this standard to consult and establish appropriate health and safety
precautions.
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.
1)
EN 2565, Aerospace series — Preparation of carbon fibre reinforced resin panels for test purposes
EN 2743, Aerospace series — Fibre reinforced plastics — Standard procedures for conditioning prior to
testing unaged materials
EN 6034, Aerospace series — Carbon fibre reinforced plastics — Test method — Determination of
1)
interlaminar fracture toughness energ
...

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