The influence of interfacial failure on the tensile S–N response of aged Arcan joints

The strength and durability of adhesive joints are significantly influenced by environmental conditions. Humidity absorption can cause deleterious effects on the adhesive joint's performance. The current study investigates the tensile properties of an epoxy‐based adhesive using Arcan joints (wh...

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Bibliographic Details
Published in:Journal of applied polymer science 2022-04, Vol.139 (16), p.n/a
Main Authors: Costa, Joviano António, Akhavan‐Safar, Alireza, Marques, Eduardo A. S., Carbas, Ricardo J. C., Silva, Lucas F. M.
Format: Article
Language:English
Subjects:
Adhesive joints
Adhesives
ageing
Aging
Butt joints
Cyclic loads
degradation
Diffusion coefficient
Diffusion rate
fatigue
Fatigue strength
Inverse method
Materials science
Mechanical properties
Polymers
Tensile properties
Tensile strength
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Summary:The strength and durability of adhesive joints are significantly influenced by environmental conditions. Humidity absorption can cause deleterious effects on the adhesive joint's performance. The current study investigates the tensile properties of an epoxy‐based adhesive using Arcan joints (which is a kind of butt joint) subjected to different aging levels and loading conditions. To this end, joints with different aging times, as well as reference‐dried samples, were subjected to both the static and cyclic loading conditions. To construct the S–N curves, different cyclic load levels were applied to the joints. The static results showed that the mechanical properties, such as tensile strength of the joints decreased with an increase of the aging time. The fatigue strength and the fatigue lifetime were significantly decreased by the increase of aging levels, mainly due to an interfacial aging phenomenon. The water diffusion in interfacial aging is faster than that of the adhesive aging, which resulted in a premature failure of the joints for both the static and fatigue conditions. Based on the experimental results, the interfacial diffusion coefficient was calculated using an inverse method. According to the results, the rate of water uptake along the interface is more than 30 times higher than that which occurs in the adhesive. The influence of interfacial aging on the S‐N response of Arcan joints.
ISSN:0021-8995
1097-4628
DOI:10.1002/app.51991