Effects of ageing frequency on the interfacial failure and tensile properties of adhesively bonded Arcan joints exposed to cyclic ageing environments

• Type: Article in International Scientific Journal
• Date: 2022

Authors

Da Costa, JA (Author) Other; Akhavan-Safar, A (Author) Other; Marques, EAS (Author) FEUP; Ricardo Carbas (Author) FEUP; da Silva, LFM (Author) FEUP

Journal

Title: Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering

ISSN: 0954-4089

Publisher: SAGE

Indexing

ISI Web of Knowledge - 0 Citations

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Other information

Authenticus ID: P-00W-CHP

DOI: 10.1177/09544089221089703

Abstract (EN): The strength and durability of adhesive joints are significantly influenced by environmental conditions. When working in a humid environment, the adhesive tends to absorb moisture and this phenomenon can drastically reduce the mechanical performance of the adhesive joints. In practise, joints are usually subjected to cyclic ageing due to moisture absorption and desorption. Accordingly, it is necessary to study the ageing behaviour of the adhesives when they are exposed to environments with cyclic humidity conditions. Accordingly, the current study investigates the mechanical properties of adhesive joints with an epoxy-based adhesive subjected to cyclic ageing conditions using Arcan joint specimens. To this aim, static tensile tests were performed for both cyclic aged, dried, and unaged Arcan joints. The effect of cyclic ageing and drying conditions, such as absorption and desorption mechanisms, on the mechanical properties of the joints were studied. In the numerical part, an experimentally obtained diffusion coefficient (D) was used to simulate the water diffusion in Arcan joint. The results showed that key mechanical properties, such as tensile strength and displacement of the joints are reduced by the number of ageing cycles. The maximum strength degradation of the aged joints compared to the unaged condition was 94% for the third ageing cycle. For the dried condition, the strength of the joints was recovered although it was not fully returned to the initial stage. It was also found that the recovery ratio increases with the ageing cycles. It is shown that a short drying process can significantly recover the mechanical response of the cyclically aged adhesive joints, especially at higher ageing cycles.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 13