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Environmental and sustainability issues coupled with increased awareness have urged researchers to focus on natural sources that can substitute several forbidden materials. Fiber‐reinforced hybrid polymeric composites have succeeded in attracting global attention toward its suitability to replace conventional materials. Hybrid fibers have recently become immensely popular with polymer composite reinforcements for various automotive parts. Hybrid composites are developed by blending natural, synthetic, or a combination of natural or synthetic fibers in a single matrix. Hybridization allows enhancements in physical, mechanical, and thermal properties of the composites. Hybrid composites assist in achieving an optimum combination of properties than individual fiber composites. In this paper, a comprehensive review of the properties of composite reinforcement natural fibers for the application of automobile components is presented. Recent articles on emerging fiber types are reviewed and fabrication techniques required for hybrid polymer composites are discussed. A prospective study is also presented and discussed of future trends in natural fiber applications as well as needed innovations for extending their applications. [ABSTRACT FROM AUTHOR]

This article presents a thorough review of biofiber‐based hybrid composites along with the discussion on its mechanical and tribological performance in the polymeric matrix. Emphasis is centered on plant fibers as animal fibers are not frequently used and mineral fibers possess serious health issues. All five types of plant fibers and their hybrids are reviewed. Hybridization of plant fibers synergetically combines individual benefits while eliminating the limitations of single fiber use. Study regarding fiber origin, processability and extraction techniques, composition, chemical surface treatments, and applications are presented. Finally, the results obtained are summarized and future developments are discussed. The review concludes that biofiber hybrid composites possess great potential in several applications provided that satisfies design constraints and polymeric matrix compatibility issues. [ABSTRACT FROM AUTHOR]

As an additive manufacturing (AM) technology, fused deposition modeling (FDM) is widely used to fabricate highly complex components. Polymer components fabricated by FDM technique have weak mechanical properties. To enhance the mechanical properties, 3D printing of polymer composites is done by reinforcing particles, nanomaterials, short and continuous fibers into thermoplastic polymers. The thermal, flame retardant, and impact properties of a continuous kevlar fiber‐reinforced onyx 3D‐printed composite are investigated in this study. Additionally, the effect of fiber arrangement and orientation (0°, 90°, 0°/90°, and +45°/−45°) on the impact strength of 3D‐printed composites have been investigated. The impact strength of the 3D‐printed composite specimens was determined using izod impact testing. It was found that specimens with fiber arrangement having fiber and matrix layer configuration as 21O|20K|20O|20K|21O have a higher impact strength and specimens with fiber arrangement as 31O|40K|31O have lower impact strength. Furthermore, specimen 3D printed with a unidirectional 0° fiber angle had the highest impact strength, while specimen 3D printed with a unidirectional 90° fiber angle had the lowest impact strength. Furthermore, flammability tests and thermogravimetric analysis were performed to investigate the flame retardant and thermal properties of 3D‐printed composites. Morphological study of onyx and kevlar fiber filament was also done using scanning electron microscope (SEM). [ABSTRACT FROM AUTHOR]