Dr.Amol Dnyaneshwarrao Sable

DOI: https://doi.org/10.5281/zenodo.22083188

Natural fiber-reinforced polymer (NFRP) composites are increasingly considered as sustainable alternatives to conventional synthetic composites. Their low density, renewable origin, and adequate mechanical performance make them attractive for applications in automotive, construction, and marine industries. Mechanical fastening through bolted joints is widely used for assembling composite structures because it allows easy inspection, replacement, and maintenance. However, introducing bolt holes creates stress concentrations that may lead to premature failure. This study investigates the mechanical performance of bolted joints in NFRP composites, focusing on fiber type, fiber orientation, hybridization, and environmental effects such as moisture and temperature. Failure mechanisms including bearing, net-tension, and shear-out are analyzed. Findings indicate that optimized fiber orientation, hybrid reinforcement, and controlled environmental conditions significantly improve joint strength and reliability.

Natural fiber composites, bolted joints, mechanical properties, hybrid composites, failure modes, environmental effects.

Bolted joints in natural fiber-reinforced polymer composites are influenced by fiber type, fiber orientation, hybrid reinforcement, and environmental exposure. Key conclusions:
1.Fiber orientation along the load direction maximizes stiffness and load capacity.
2.Hybrid laminates with synthetic fibers improve bearing strength and delay crack propagation.
3.Environmental factors such as moisture and temperature decrease mechanical performance by weakening the fiber-matrix interface.
4.Bearing failure is preferred due to progressive damage, while net-tension and shear-out are undesirable.
Optimizing fiber selection, laminate design, and environmental protection is essential for reliable NFRP composite structures.

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Dr.Amol Dnyaneshwarrao Sable (2026). Comprehensive Analysis of Bolted Joint Performance in Natural Fiber-Reinforced Polymer Composites: Effects of Fiber Type, Orientation, Hybridization, and Environmental Conditions. International Journal of Engineering and Techniques, 12(4), 182–185. ISSN: 2395-1303. DOI: https://doi.org/10.5281/zenodo.22083188