Water ageing effects on the elastic and viscoelastic behaviour of epoxy-based materials used in marine environment. (1st August 2022)

• Record Type: Journal Article
• Authors: Dezulier, Q.; Clement, A.; Davies, P.; Arhant, M.; Flageul, B.; Jacquemin, F.
• Is Part Of: Composites. Number 242(2022)
• Publication Date: 2022-08-01
• Subjects: Thermosetting resin -- Creep -- Ageing -- Analytical modelling -- Finite element analysis; Composite materials -- Periodicals; Materials science -- Periodicals; Composite materials; Periodicals; Electronic journals; 620.118
• DOI: 10.1016/j.compositesb.2022.110090
• Languages: English
• ISSNs: 1359-8368

Abstract

Abstract: Both experimental tests and numerical simulations have been performed in this study to analyze the influence of long-term immersion (over 500 days) on the hygro-elastic and hygro-viscoelastic behaviour of epoxy resin samples. First, a diffusive and swelling campaign was carried out with water immersion at 25 °C and 60 °C. Various experimental tests have also been undertaken at different stages of ageing to highlight and quantify the influence of water diffusion on elastic and viscoelastic properties. A model is then proposed to simulate the hygro-viscoelastic behaviour of the studied material through finite element simulations. A good agreement between the experimental and numerical results is observed. Highlights: Viscoelastic properties evaluation is necessary to analyze the time-dependent mechanical behaviour under humid conditions. Moisture uptake leads to changes in the visco-elastic behaviour. 4-parameters Burgers model provides a good fit for creep tests on epoxy samples for both dry and humid cases. An implementation of the viscoelastic model within a FE software is possible through the use of Prony series.