Finite Element Analysis and Modelling of Perlon - Fiberglass of a Prosthetic socket

Abstract

Finite element analysis can be a useful tool in investigating the mechanical interaction between the residual limb and its prosthetic socket, and in computer-aided design and computer-aided manufacturing of prosthetic sockets.

The intention of this paper was to analyze prosthetic socket of distinct materials and for different geometry for optimum design solution by finite element analysis. The finite element method (FEM) is a very powerful tool for analysing the behaviour of structures, especially when the geometry and mechanics are too complex to be modelled with analytical methods. A modified three dimensional finite element model of socket was developed in workbench of ANSYS 14.0 to find out the stress distribution and deformation pattern under functionally appropriate loading condition during normal gait cycle.  A variety of materials were used for the analysis of the socket like The optimization technique results showed that the best optimal design of the prosthetic above knee socket is in lay-up 4perlon 2fiber glass 4perlon design under temperature 20 . This study focuses on the analysis of patellar tendon bearing prosthetic sockets with integrated compliant features designed to relieve contact pressure between the residual limb and socket. In this study, the numerical results of stress distribution model of the prosthetic above knee socket showed that the values of maximum stress according to Von-Mises criterion results are increased with the increasing of temperatures. The best designs results of the prosthetic above knee socket are (94.64%) in lamination lay-up 4-2-4 under 20  where it took from pervious study. The procedure developed through this work can be used by future researchers and prosthetic designers in understanding how to better design transfemoral prosthesis.

Keywords: Prosthetic; Safety factor; Finite element model; Socket