Hybrid biofiber-based composites for structural cellular plates

This paper presents how biofiber composites (biocomposites) can be used for structural applications by enhancing their performance through hybridization and cellular structural forms. Cellular biocomposite cores made from industrial hemp or flax fibers with unsaturated polyester were hybridized with woven jute, chopped glass, and unidirectional carbon fabrics. Material characterization showed improved stiffness, strength, and moisture-absorption stability, while flexural tests on laboratory-scale plates demonstrated enhanced structural behavior. Micromechanics and sandwich analyses adequately captured material and structural response and the benefit from residual stresses was evaluated. Results indicate that hybrid cellular biofiber-based composites provide an economic and environmentally friendlier alternative to entry-level synthetic composites. (c) 2004 Elsevier Ltd. All rights reserved.