Stress analysis of the above-knee prosthesis during gait cycle

Abstract EN

In this paper the finite element analysis was achieved on the above-knee prosthesis to investigate a picture of stress distribution in the socket.

Previous works on the prosthe-ses used the symmetry approximation in shape modeling and most of them are all about static loading.

The analysis and shape modeling in this work were achieved in high ac-curacy with the aid of ANSYS 12.1 package software capabilities.

Of this study, stress analysis was achieved under dynamic loading at the three main gate cycle; soon after heel strike, foot flat and just before tow off as traditional stages used in researches.

This work lies on the dynamic loading calculated with the ground reaction forces, dynamic forces, and moments as well as the angular and linear acceleration of foot up to the thigh during the three main gate cycles.

The stress distribution was achieved and it is imported to note that the maximum stresses induced in the socket are at the upper brim whereas most parts of the socket are considered as a low stress region.