Investigation of Design Properties of Hybrid Fiber Polyester Matrix Composite

Abstract

This study centered on experimental investigation of mechanical properties of bamboo/plantain fiber hybrid reinforced polymer matrix composite. A fiberglass single-cavity mold was used to produce hybrid bamboo-plantain fiber composites through a sandwich construction process. Fibers were cleaned, treated with 5% NaOH, and layered with resin in varied orientations within the wax-prepared mold. Curing at room temperature ensured bonding. Mechanical testing followed ASTM standards, examining tensile, impact, fatigue, and buckling properties. Tensile testing measured strength, impact testing assessed fracture characteristics, fatigue testing evaluated durability under cyclic loads, and buckling tests studied structural stability under compressive stress. Mechanical tests on HBPFC samples show that impact, tensile, fatigue, and buckling strengths vary by fiber orientation and volume in the composite. In impact tests, sample D1 had the highest resistance (24KJ/m²) and F1 the lowest (12KJ/m²). Tensile tests showed D1 with the highest strength (170N/mm²), while E1 had the lowest (135N/mm²). Fatigue tests indicated B2/D1 had maximum strength (165N/mm²) and A2/E1 the lowest (135N/mm²). In buckling tests, D1 was strongest (140N/mm²)) and C3/E1 weakest (80N/mm²)). In conclusion, the HBPFC testing determined key mechanical properties, showing sample D1 with the highest impact resistance and highest tensile strength. Recommendations include optimizing fiber ratios, collaborating with regulatory bodies for standards in marine applications, and researching production scale-up to maintain quality consistency.