This study investigates the vibration characteristics of hybrid composite laminated plates made from E-glass and areca fibers, targeting applications that demand both mechanical performance and environmental sustainability. The motivation stems from the growing interest in replacing synthetic fibers with natural alternatives in structural applications, particularly for lightweight and vibration-sensitive components.
Areca fiber, an abundant and biodegradable natural material, was combined with high-strength E-glass fiber to form hybrid laminates using the Vacuum Assisted Resin Transfer Moulding (VARTM) process. Three distinct composite plates were fabricated with different stacking sequences and filler variations using epoxy resin and brake lining powder. The mechanical integrity and vibrational behavior of these plates were then studied using experimental modal analysis.
The tests were conducted under three boundary conditions: fully clamped (C-C-C-C), two-edge clamped (C-F-C-F), and single-edge clamped (C-F-F-F). Using DEWESoft software and roving hammer test setup, natural frequencies and damping ratios for each configuration were extracted. Plate 1, with more E-glass layers and brake lining filler, demonstrated the best damping behavior, making it suitable for vibration-suppression applications. Plate 3, which lacked filler and had reduced thickness, showed the highest amplitude and stiffness but was more prone to resonance.
The results indicate that strategic layering and inclusion of natural fibers and fillers can tailor the damping and vibrational response of composite materials. This hybrid approach leverages the structural strength of E-glass with the sustainable and damping properties of areca fiber. The study demonstrates the viability of using such hybrid composites for eco-friendly, vibration-sensitive structural components in automotive, marine, and civil applications.
Keywords: Hybrid composites, Areca fiber, E-glass fiber, VARTM, Vibration analysis, Natural frequency, Sustainable materials