SIST EN 2155-19:2001

Aerospace series - Test methods for transparent materials for aircraft materials for aircraft glazing - Part 19: Determination of craze resistance

This standard specifies the resistance of transparent sheet to the effect of a solvent environment while set up as a cantilever beam with a load applied at the free end. No method has been developed yet for specimens with a thickness < 6 mm; for such material, a test method shall be agreed between the supplier and the customer.

Luft- und Raumfahrt - Prüfverfahren für transparente Werkstoffe zur Verglasung von Luftfahrzeugen - Teil 19: Bestimmung der Spannungsrißbeständigkeit

Diese Norm legt die Beständigkeit transparenter Tafeln gegen die Einflüsse einer lösungsmittelhaltigen Umgebung fest, wobei diese als Ausleger eingespanntund am freien Ende belastet werden. Für Proben mit einer Dicke < 6 mm wurde bisher noch kein Verfahren ausgearbeitet; für ein solches Material muß ein Prüfverfahren zwischen Lieferanten und Käufer vereinbart werden.

Série aérospatiale - Méthodes d'essais pour matériaux transparents pour vitrages aéronautiques - Partie 19: Détermination de la résistance au fendillement "crazing"

La présente norme spécifie la résistance d'une feuille transparente soumise à l'influence d'une ambiance de solvant lorsqu'elle est montée en poutre cantilever, la charge étant appliquée à son extrémité libre. Aucune méthode n'a encore été développée pour les éprouvettes d'épaisseur < 6 mm; pour de tels matériaux, une méthode d'essai doit être définie entre le fournisseur et le client.

Aerospace series - Test methods for transparent materials for aircraft materials for aircraft glazing - Part 19: Determination of craze resistance

General Information

• Status: Published
• Publication Date: 31-May-2001
• ICS: 49.045 - Structure and structure elements
• Technical Committee: SS SPL - Technical Board for the general field
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Jun-2001
• Due Date: 01-Jun-2001
• Completion Date: 01-Jun-2001
• Ref Project: EN 2155-19:1996 - Aerospace series - Test methods for transparent materials for aircraft materials for aircraft glazing - Part 19: Determination of craze resistance

Overview

EN 2155-19:1996 is a CEN aerospace standard that defines a laboratory test method to determine the craze resistance of transparent sheet materials used in aircraft glazing. The method assesses how a transparent material behaves when exposed to a solvent environment while configured as a cantilever beam with a load applied at the free end. The standard is intended for use in the aerospace sector to evaluate the susceptibility of glazing materials to stress-induced microcracking (crazing) under solvent exposure.

Key topics and requirements

• Test objective: Measure the resistance of transparent sheet materials for aircraft glazing to crazing when exposed to solvents under a cantilever beam loading condition.
• Test configuration: Specimens are mounted as a cantilever beam with a load at the free end (specified in the standard).
• Environmental condition: The specimen is subjected to a solvent environment during the test to reveal craze formation under stress.
• Specimen thickness limitation: No validated method is provided for specimens thinner than 6 mm. For materials with thickness < 6 mm, the standard requires that a test method be agreed between supplier and customer.
• Scope limitation: The standard applies to transparent sheet materials intended for aircraft glazing; it does not cover non-transparent materials or glazing systems beyond sheet material testing.
• Standard identity and adoption: EN 2155-19 is part of the aerospace series of test methods for transparent materials and has been adopted into national collections (e.g., SIT institutions).

Applications

• Material selection: Helps engineers choose transparent polymers and sheets that resist crazing when in contact with cleaners, fuels, hydraulic fluids or other solvents.
• Quality control: Used by manufacturing and QA laboratories to verify production batches meet crazing-resistance expectations.
• Supplier–customer agreements: Provides a basis for contractual testing; for thin materials (<6 mm) it guides negotiation of an agreed test procedure.
• Certification support: Useful for compliance evidence in aircraft glazing qualification and vulnerability assessments related to solvent exposure.

Who uses this standard

• Materials and design engineers in aerospace and avionics
• Test laboratories and quality assurance teams
• Glazing and transparent material manufacturers and suppliers
• Procurement and certification specialists evaluating material durability

Related standards

• Other parts of the EN 2155 aerospace series covering test methods for transparent materials and aircraft glazing. Users should consult adjacent parts of the series for complementary test methods and requirements.

Keywords: EN 2155-19, craze resistance, aircraft glazing, transparent materials, cantilever beam test, solvent resistance, aerospace test methods.

Standards Content (Sample)

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aerospace series - Test methods for transparent materials for aircraft materials for aircraft glazing - Part 19: Determination of craze resistanceLuft- und Raumfahrt - Prüfverfahren für transparente Werkstoffe zur Verglasung von Luftfahrzeugen - Teil 19: Bestimmung der SpannungsrißbeständigkeitSérie aérospatiale - Méthodes d'essais pour matériaux transparents pour vitrages aéronautiques - Partie 19: Détermination de la
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