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|Title: ||Moisture absorption-desorption effects in adhesive joints|
|Authors: ||Mubashar, Aamir|
Ashcroft, Ian A.
Critchlow, Gary W.
Aluminium and alloys
|Issue Date: ||2009|
|Publisher: ||© Elsevier|
|Citation: ||MUBASHAR, A. ... et al, 2009. Moisture absorption-desorption effects in adhesive joints. International Journal of Adhesion and Adhesives, 29 (8), pp. 751-760.|
|Abstract: ||This paper presents a study of moisture absorption-desorption effects in single lap
adhesive joints. Experiments were carried out to characterise the moisture uptake of the
single part epoxide adhesive, FM73. Tensile testing of single lap joints manufactured
from aluminium alloy 2024 T3 and O and FM73 adhesive was carried out after the
joints were exposed to different conditioning environments. The experimental results
revealed that the failure strength of the single lap joints with 2024 T3 adherends
progressively degraded with time when conditioned at 50°C, immersed in water.
However, the joint strength almost completely recovered after moisture was desorbed.
The single lap joints with 2024 O adherends showed decreased strength for 28 days of
conditioning, after which strength recovered, reaching a plateau after 56 days. Again,
strength almost completely recovered on desorption of moisture. The strength recovery
of the joints, after desorption of moisture, showed that the degradation of the adhesive
was largely reversible. Analysis of the failure surfaces revealed that the dry joints failed
cohesively in the adhesive layer and that the failure path moved towards the interface
after conditioning. The failure mode then reverted back to cohesive failure after moisture desorption.|
|Description: ||This article was published in the journal, International Journal of Adhesion & Adhesives [© Elsevier] and the definitive version is available at: www.elsevier.com/locate/ijadhadh|
|Version: ||Accepted for publication|
|Appears in Collections:||Published Articles (Materials)|
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