Experimental and numerical analysis of cyclic aging in an epoxy-based adhesive

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Moazzami, M (Author) Other; Ayatollahi, MR (Author) Other; Akhavan Safar, A (Author) Other; da Silva, LFM (Author) FEUP

Journal

Title: Polymer Testing

Vol. 91

ISSN: 0142-9418

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 0 Citations

Scopus - 7 Citations

Other information

Authenticus ID: P-00S-MHQ

DOI: 10.1016/j.polymertesting.2020.106789

Abstract (EN): The strength and durability of adhesive joints in different applications is of special concern where aging can significantly influence the joint permanence. Aging of adhesive joints is very crucial in industries where the joints are exposed to variable environmental conditions during their life. Due to the aging, the mechanical properties of the adhesive layer, interfacial bonding properties and substrates mechanical performance (in case of composite substrate), change. In real applications, the aging conditions is cyclic where the joints frequently experience aging and drying conditions. This article investigates the mechanical behavior and water absorption properties of an epoxy based adhesive in bulk form, subjected to cyclic aging conditions. The effect of cyclic aging on different parameters such as the rate of moisture absorption and desorption, stress-strain curve, glass transition temperature (T-g) have been studied. In the numerical section the parameters of moisture diffusion obtained experimentally were used to simulate the moisture distribution in dog-bone specimens. The experimental results show that in cyclic aging conditions the moisture diffusion constant and the maximum moisture content increase with aging cycles. Also it was found that the mechanical properties such as the elastic modulus and the tensile strength in saturation states decrease with increasing the aging cycles.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10