EN 2243-6:2005

Aerospace series - Non-metallic materials - Structural adhesives - Test method - Part 6: Determination of shear stress and shear strain

This standard defines the general requirements for the determination of shear stress and shear strain behaviour of structural adhesives by testing in tension metal to metal lap joints, at ambient or other temperatures.
This method can also be used to investigate the influence of environmental exposures on structural adhesives.

Luft- und Raumfahrt - Nichtmetallische Werkstoffe - Strukturelle Klebstoffe - Prüfverfahren - Teil 6: Bestimmung der Schubspannung und Gleitung

Diese Norm legt allgemeine Anforderungen fest zur Bestimmung des Verhaltens von strukturellen Klebstoffen unter Schubspannung und Gleitung im Zugversuch an überlappten Ganzmetallklebungen bei Raum- oder anderen Temperaturen.
Dieses Verfahren kann auch zur Untersuchung des Einflusses von Umweltbedingungen auf strukturelle Klebstoffe angewandt werden.

Série aérospatiale - Matériaux non-métalliques - Système d'adhésifs structuraux - Méthodes d'essai - Partie 6 : Détermination de la contrainte et de la déformation de cisaillement

Aeronavtika – Nekovinski materiali – Konstrukcijska lepila – Preskusna metoda – 6. del: Določanje strižne napetosti in strižne deformacije

General Information

• Status: Published
• Publication Date: 25-Oct-2005
• Withdrawal Date: 29-Apr-2006
• ICS: 49.025.50 - Adhesives
• Technical Committee: ASD-STAN - Aerospace
• Drafting Committee: ASD-STAN/D 4 - Metallic
• Current Stage: 6060 - Definitive text made available (DAV) - Publishing
• Start Date: 26-Oct-2005
• Completion Date: 26-Oct-2005
• Ref Project: SIST EN 2243-6:2006 - Aerospace series - Non-metallic materials - Structural adhesives - Test method - Part 6: Determination of shear stress and shear strain

Overview

EN 2243-6:2005 - Aerospace series - Non-metallic materials - Structural adhesives - Test method - Part 6: Determination of shear stress and shear strain is a CEN/AECMA test standard for assessing the shear behaviour of structural adhesives using tension metal-to-metal single lap joints. The method covers testing at ambient and non‑ambient temperatures and can be applied to evaluate environmental exposure effects on adhesive joints used in aerospace structures.

Key Topics and Requirements

• Test configuration: Tension-loaded metal-to-metal single lap joints with full mating surface bonded; adhesive thickness controlled with shims when required.
• Temperature control: Tests at ambient (23 ± 2 °C) or other specified temperatures with pre‑stabilization and dwell periods for non‑ambient conditions.
• Load application and equipment:
  • Tensile testing machine conforming to EN ISO 7500‑1 (class 1).
  • Moment‑free loading using a Cardanic suspension.
  • Continuous recording of load‑displacement curve.
• Displacement measurement:
  • Extensometers with displacement accuracy to within 0.001 mm.
  • Gauge distance and attachment method must minimize adherend deformation influence; duplicate measurements recommended (both sides of overlap).
• Dimensional and measurement tolerances:
  • Overlap dimensions measured to ±0.1 mm; adhesive thickness measured to ±0.01 mm and averaged.
• Data and calculations:
  • Shear stress τ = F / (L · W)
  • Shear strain tgγ = d / t
  • Elastic shear modulus Ge calculated from slope of linear region: Ge = τ / tgγ
• Reporting: Full traceability of adhesive system and metal, surface preparation, bonding and curing conditions, specimen identification, extensometer details, individual and statistical results, failure mode and stress–strain diagrams.

Applications and Users

Who benefits from EN 2243-6:2005:

• Aerospace materials and structural engineers validating adhesive joint strength and stiffness.
• Test laboratories performing qualification, batch acceptance, or environmental aging studies.
• Adhesive manufacturers characterizing product shear properties and providing datasheets.
• Quality assurance teams verifying production bonding processes and traceability.

Practical uses:

• Characterizing shear stress/strain behaviour for design allowables.
• Comparing adhesive systems under different temperatures or after environmental exposure.
• Supporting failure analysis by combining stress–strain data with observed failure modes.

Related Standards

• EN 2243-1 - Structural adhesives - Test methods - Part 1 - Single lap shear
• EN 2334 - Chromic‑sulphuric acid pickle of aluminium alloys (surface prep)
• EN 2419 - Aluminium alloy EN 2419 (adherends for tests)
• EN ISO 7500-1 - Verification of static uniaxial testing machines
• EN 4385 - General organisation of aerospace non‑metallic material standards

EN 2243-6:2005 is a practical, prescriptive method for reliable measurement of shear properties of structural adhesives used in aerospace, enabling consistent comparison, qualification and quality control.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Non-metallic materials - Structural adhesives - Test method - Part 6: Determination of shear stress and shear strainSérie aérospatiale - Matériaux non-métalliques - Systeme d'adhésifs structuraux - Méthodes d'essai - Partie 6 : Détermination de la contrainte et de la déformation de cisaillementLuft- und Raumfahrt - Nichtmetallische
Werkstoffe - Strukturelle Klebstoffe - Prüfverfahren - Teil 6: Bestimmung der Schubspannung und GleitungTa slovenski standard je istoveten z:EN 2243-6:2005SIST EN 2243-6:2006en49.025.50ICS:SLOVENSKI
STANDARDSIST EN 2243-6:200601-julij-2006

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 2243-6October 2005ICS 49.025.50 English VersionAerospace series - Non-metallic materials - Structural adhesives- Test method - Part 6: Determination of shear stress and shearstrainSérie aérospatiale - Matériaux non-métalliques - Systèmed'adhésifs structuraux - Méthodes d'essai - Partie 6 :Détermination de la contrainte et de la déformation decisaillementLuft- und Raumfahrt - Nichtmetallische
Werkstoffe -Strukturelle Klebstoffsysteme - Prüfverfahren - Teil 6:Bestimmung der Schubspannung und GleitungThis European Standard was approved by CEN on 26 September 2005.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the Central Secretariat or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the officialversions.CEN members are the national standards bodies of Austria, Belgium, Cyprus, Czech Republic, Denmark, Estonia, Finland, France,Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Slovakia,Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2005 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 2243-6:2005: E

1) Published as AECMA Standard at the date of publication of this standard. 2) Published as AECMA Prestandard at the date of publication of this standard.

angle of measured shear strain (in radians); d shear displacement (in millimetres); t adhesive thickness (in millimetres); F load (in newtons); L length of overlap (in millimetres); W width of overlap (in millimetres); Ge elastic shear modulus (in newtons per square millimetres). 4 Health and safety This standard does not necessarily include all health and safety requirements, associated with its use. Persons using this standard shall be familiar with normal laboratory/test house practices. It is the responsibility of the user to establish satisfactory health and safety practices and to ensure conformity with any European, national or local laws/regulations. 5 Principle/Technique Not applicable 6 Resources 6.1 Apparatus All test equipment shall be calibrated at intervals not exceeding 12 months. 6.1.1 Tensile testing machine The tensile testing machine shall conform to class 1 of EN ISO 7500-1. The failing load of the test specimen shall be within 20 % and 80 % of the upper limit of the selected loading range of the machine. 6.1.2 Suspension In order to obtain moment-free load application, a Cardanic suspension is required (see Figure 1). 6.1.3 Extensometers They shall meet the following requirements:  accuracy of test piece displacement measurement to within 0,001 mm;  measurement of test piece overlap displacement (example of three point measurement is shown in Figures 1 and 2);
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