Sumeia A. Mechi
Prosthetic feet are frequently manufactured using composite laminates to balance strength, weight, and comfort. Since these structures undergo varying stresses during gait, optimizing their mechanical properties is critical. This study investigated the influence of nanomaterial reinforcement on stress distribution in composite foot prostheses composed of carbon fiber, Kevlar, and Perlon. A mathematical model was employed to determine the effective modulus of elasticity, while finite element analysis was used to evaluate Von Mises stress, strain, and deformation. The suggested foot was analyzed in the case of heel strike. Results showed that incorporating SiO₂ nanoparticles at a 2.5% weight fraction improved the proposed layer sequence. (1Perlon+2Carbon+1Kevlar+4Perlon+1Kevlar+2Carbon+1Perlon) achieved the most significant improvements, reducing stress by 50.36%, strainby61.64%, and deformation by 35.50%. Al₂O₃ nanoparticles provided slightly lower but comparable performance. Overall, nano-reinforced composites demonstrate potential for developing lighter, stronger prosthetic feet that improve durability and patient comfort