ORIGINAL PAPER
The Degradation of mechanical characteristics and morphology in GFRP composite under real maritime conditions for marine structure application
1
Laboratory of Energy Systems Technologies (LTSE), Dept. Process Eng. & Energetics, National Higher School of Technology and Engineering, Algeria
2
Mechanics of Materials & Plant Maintenance Research Laboratory (LR3MI), Mechanical Eng. Dept., Badji Mokhtar University, Algeria
Submission date: 2025-06-24
Final revision date: 2025-10-11
Acceptance date: 2026-06-12
Online publication date: 2026-08-25
Corresponding author
Djaber BOUHAFARA
Laboratory of Energy Systems Technologies (LTSE), Dept. Process Eng. & Energetics, National Higher School of Technology and Engineering, Sidi Amar Campus, P.O. Box 12, 23005, Annaba, Algeria
Laboratory of Energy Systems Technologies (LTSE), Dept. Process Eng. & Energetics, National Higher School of Technology and Engineering, Sidi Amar Campus, P.O. Box 12, 23005, Annaba, Algeria
KEYWORDS
TOPICS
ABSTRACT
The composite elements have proven their significance across all technological domains, particularly in the creation of materials for use in construction engineering, like GRP Rebars. Specifically, glass fibers are utilized as reinforcement in polymeric composites across several sectors. Engineers create composite materials to address concerns related to mechanical characteristics, erosion conduct, instantaneous breaking, and heat resistance. The present article reveals the effects of degradation conditions like seawater and distilled water on the utilization of composite elements in building construction. The article explains the effects of these marine environments on the damage of unsaturated polyester/glass composites. The concept of composite materials in diverse applications may provide a new avenue in contemporary engineering, and research was conducted to determine the energy absorption capacity under impact. We tested glass/unsaturated polyester composites for two months in both salt water and distilled water. The technique of resin transfer molding was used to produce the samples with a 40% glass fiber mass ratio Mf. The Charpy impact test was performed on composite specimens, and the results showed that the glass/polyester composite in distilled water after 1 month and 2 months has the highest absorption of energy compared with the samples of composite degrading in seawater, but it is not a big difference, so it is pretty close. Furthermore, (SEM) was utilized to illustrate the distinct failures in fracture surfaces. It was found that the glass/unsaturated polyester composite after aging in marine conditions failed by fiber fracture and fracture through the matrix.
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