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Applied Bionics and Biomechanics
Volume 2017, Article ID 7595642, 14 pages
https://doi.org/10.1155/2017/7595642
Research Article

An Investigation into a Gear-Based Knee Joint Designed for Lower Limb Prosthesis

1Manufacturing System Integration, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
2Department of Electrical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia

Correspondence should be addressed to I. A. Choudhury; moc.liamg@aiyruhduohc

Received 12 October 2016; Revised 5 January 2017; Accepted 31 January 2017; Published 11 May 2017

Academic Editor: Thibault Lemaire

Copyright © 2017 M. S. H. Bhuiyan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

A gear-based knee joint is designed to improve the performance of mechanical-type above-knee prostheses. The gear set with the help of some bracing, and bracket arrangement, is used to enable the prosthesis to follow the residual limb movement. The motion analysis and finite-element analysis (FEA) of knee joint components are carried out to assess the feasibility of the design. The maximum stress of 29.74 MPa and maximum strain of 2.393e−004 are obtained in the gear, whereas the maximum displacement of 7.975 mm occurred in the stopper of the knee arrangement. The factor of safety of 3.5 obtained from the FE analysis indicated no possibility of design failure. The results obtained from the FE analysis are then compared with the real data obtained from the literature for a similar subject. The pattern of motion analysis results has shown a great resemblance with the gait cycle of a healthy biological limb.