Publication: Effect of temperature on mechanical properties of kenaf composite under impact loading
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Date
2024-07-01
Authors
Nur Syafifi Athira Binti Jailani
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Abstract
This thesis explores how different temperatures affect the strength and behavior of kenaf-epoxy composite materials when they are subjected to dynamic forces. With growing interest in eco-friendly materials, it's crucial to understand the performance of kenaf fibers under various elevated temeprature for industrial applications. This study examines the mechanical properties of kenaf-epoxy composites at temperatures ranging from room temperature,30°C to 40°C, focusing on their strength and durability. The project addresses the significant problem of how temperature variations influence the structural integrity and mechanical performance of kenaf-epoxy composites. The study spans a range of temperatures from room temperature up to 40°C, focusing on key mechanical properties such as tensile strength, flexural strength, impact resistance, and Young's modulus. The research methodology involves preparing kenaf-epoxy composite samples and subjecting them to controlled temperatures. Mechanical testing, including tensile, flexural, and impact tests, was performed to evaluate the composite's behavior under different thermal conditions. The Split Hopkinson Pressure Bar (SHPB) method was utilized to simulate dynamic loading scenarios accurately.Results revealed that at lower temperatures, the primary mode of failure in the composites was minor matrix cracking. However, as the temperature increased beyond 35°C, significant changes were observed. The composite material exhibited severe fiber fracture, fiber debonding, and extensive matrix cracking, particularly at 40°C. These findings highlight the critical influence of temperature on the composite's ability to withstand dynamic loads, with higher temperatures leading to substantial reductions in strength and stiffness.This research successfully demonstrates the limitations and potential of kenaf-epoxy composites under various thermal conditions. It underscores the necessity for further investigation into optimizing composite formulations and manufacturing processes to enhance performance at elevated temperatures. The study provides a foundational understanding that can guide future developments in the use of natural fiber composites in high-temperature applications.