Development of hybrid green composites by dual natural fibers (jute/bamboo) reinforcement and investigation of their mechanical behavior

• Published in: Polymer composites Vol. 45; no. 9; pp. 8225 - 8235
• Main Authors: Abraha Guangul, Haftamu, Prabhakar, M. N., Lee, Dong Woo, Song, Jung‐il
• Format: Journal Article
• Language: English
• Published: Hoboken, USA John Wiley & Sons, Inc 20.06.2024; Blackwell Publishing Ltd
• Subjects: Agglomeration; Bamboo; bamboo fibers; Energy absorption; Fibers; Flexural strength; hybrid composite; Hybrid composites; Investigations; Jute; jute fibers; Mechanical properties; natural fibers; Numerical methods; Panels; Reinforcing materials; Resin transfer molding; Shear properties; Stacking sequence (composite materials); Strain energy; vinyl ester matrix
• ISSN: 0272-8397; 1548-0569
• DOI: 10.1002/pc.28336

This study aims to investigate the mechanical properties of natural fiber hybrid composites, specifically those based on jute and bamboo fibers. Jute fibers made in the form of highly scattered mesh and fine‐meshed bamboo mat were selected as reinforcing materials. The highly scattered meshed jute fabric composite showed poor mechanical properties owing to resin agglomeration, leading to the brittle fracture of the composite before elongation. In contrast, the randomly oriented fine‐meshed bamboo fabric performed better in terms of both mechanical properties and strain energy absorption under the same loading conditions. Hybridization with fine bamboo mesh fibers can be a solution to improve the mechanical properties of jute fabric composites. The tensile, flexural, and in‐plane shear properties of the composites are investigated in our study. We found that hybridizing a fine‐meshed bamboo mat with jute fabric resulted in an improved mechanical performance of the composite. Composite panels have been manufactured using vacuum assisted resin transfer molding (VARTM). Experimental and numerical methods have been used to investigate the flexural behavior. Of the stacking sequences considered, the (J/B4/J) stacking showed the highest flexural strength (141.1 Mpa) and the (B2/J2/B2) 2/2 stacking sequence showed the minimum flexural strength. The alternating stacking sequence (B/J/B/J/B/J) exhibited intermediate properties. The randomly oriented bamboo fabric near the neutral axis enhanced the properties of the hybridized composite. This was verified numerically using the ANSYS ACP software. Highlights Mechanical behavior of Hybrid composite of two natural fibers was investigated. Vacuum assisted resin transfer molding was used to manufacture composite panels. Tensile, in plane shear, 3 point flexural tests and SEM micro analysis were done. FEA was used to validate and compare the experimental and numerical results. Resin agglomeration was improved by fibers with better resin impregnation property. Schematic representation of the procedure used to prepare Hybrid composites and their Flexural results.