Investigation of flexural mechanical and creep properties of sleeve reinforced pultruded glass fibre reinforced polymer composite for crossarm application

Investigation of flexural mechanical and creep properties of sleeve reinforced pultruded glass fibre reinforced polymer composite for crossarm application

Abstract Pultruded glass fiber-reinforced polymer (PGFRP) composites are innovative materials used in high-rise transmission towers that undergo failure due to long-term static loading phenomenon. This research focuses on retrofitting PGFRP composite cross-arms with plug-in type sleeve reinforcement...

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Bibliographic Details
Main Authors: Vijayvignesh Namasivayam Sukumaar, Mohamad Ridzwan Ishak, Mohd Na’Im Abdullah, Mohamed Yusoff Mohd Zuhri, Muhammad Asyraf Muhammad Rizal
Format: Article
Language:English
Published: Nature Portfolio 2025-05-01
Series:Scientific Reports
Subjects:
Cross-arm
Sleeve
Flexural properties
PGFRP composite
Elastic moduli
Online Access:https://doi.org/10.1038/s41598-025-00732-w
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Summary:Abstract Pultruded glass fiber-reinforced polymer (PGFRP) composites are innovative materials used in high-rise transmission towers that undergo failure due to long-term static loading phenomenon. This research focuses on retrofitting PGFRP composite cross-arms with plug-in type sleeve reinforcements by employing a three-point bending (3 PB) test to analyze the cross-arm’s elastic properties, flexural creep response, and deflection behaviour. The addition of the sleeve retrofit significantly improved the load–deflection behaviour and long-term creep resistance, by 45.30% and 47.10%, respectively. Findley’s power law model was used to accurately predict the viscoelastic response of the structure, revealing that the virgin cross-arm experienced a 75% drop in elastic modulus, while the sleeve-reinforced cross-arm saw only a 34% decrease indicating over 40% improvement in the cross-arm’s ability to resist deformation over extended periods. Additionally, the overall reduction factor improved by 0.51 in contrast to virgin cross-arm. The sleeve-reinforced cross-arm showed reduced deflection, better creep resistance, increased bending strength, and a longer theoretical lifespan. Predictions indicate that the improved cross-arm surpasses the current one in long-term mechanical performance.
ISSN:2045-2322

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