The cyclic-fatigue behaviour of adhesive joints, which consisted of an aerospace-grade epoxy-adhesive bonding aluminium-alloy substrates, has been investigated. Fracture-mechanics tests were used to obtain the relationship between the rate of fatigue crack growth per cycle, da/dN, and the maximum strain-energy release rate, Gmax, applied during the fatigue cycle. These cyclic-fatigue tests were conducted in both a 'dry' environment of (23 +/- 1) deg C and 55 % relative humidity and a 'wet' environment of immersion in distilled water at (28 +/- 1) deg C. In particular, the effect of using various surface pretreatments for the aluminium-alloy substrates, prior to forming the adhesive joint, has been investigated. X-ray photoelectron spectroscopy and electron microscopy techniques have been used to identify the locus of joint failure and the mechanisms of environmental attack.
The role of the interphase in the environmental failure of adhesive joints
Bedeutung der Zwischenphase für das Versagen von Klebverbindungen unter Umgebungsbedingungen
Ceramic and Bimaterial Interfaces: Designing for Properties, Acta Materialia Workshop, 1999 ; 4543-4553
Acta Materialia ; 48 , 18/19
2000
11 Seiten, 11 Bilder, 2 Tabellen, 22 Quellen
Aufsatz (Konferenz)
Englisch
Luftfahrttechnik , Aluminiumlegierung , Klebverbindung , Metallkleben , Adhäsion , Grenzflächenreaktion , feuchte Atmosphäre , Ermüdung bei niedrigen Lastspielzahlen , Ermüdungsfestigkeit , Risswachstum , ESCA-Spektroskopie , Primer , Grenzschichtablösung , Vorbehandlung , Anodisieren , Transmissionselektronenmikroskopie
Environmental chamber for testing structural adhesive joints
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