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

• Type: Article in International Scientific Journal
• Date: 2021

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: Journal of Applied Polymer Science

Vol. 139

ISSN: 0021-8995

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 0 Citations

Other information

Authenticus ID: P-00V-TEW

DOI: 10.1002/app.51991

Abstract (EN): 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 14