DESIGN AND MANUFACTURING OF PROSTHETIC BELOW KNEE SOCKET BY MODULAR SOCKWT SYSTEM

Abstract

The large numbers of terrorist attacks and the difficulty of the situations in Iraq led to the rise of the amputees’ numbers. However, typically 80% of the amputations are trans-tibial (below knee (BK) lower limb amputations). This research included the fabrication of a new type of socket by a new method (modular socket system)(MSS) that used direct lamination on residual limb of patients. Socket materials were subjected to tensile and creep (500 C) in order to determine their mechanical properties. Creep test data were analyzed in order to obtain time dependent creep compliance using the standard linear solid (the zener) model, the socket failure characteristics at room temperature and at high temperature (500oC) were determined by fatigue testing. Interface pressure between the socket and the residual limb was calculated using F-Socket software; In addition, a numerical method was used by applying the program ANSYS 15. The present work aim to study the experimental, theoretical and numerical results of tests and compared with the results of other reference. The experimental results show the specimens that manufactured by (MSS) have higher yield stress, medium young modulus, higher resistance to creep and low temperature effect on the S-N curve, where the reducing rate of S-N curve in the presence of temperature of group A (4.5%) compared with group C in which reducing rate (50%). Theoretical results of groups A, B show the creep compliance increased at first at rate (200%, 11%), respectively but after (50min.) The creep compliance becomes constant...

Keywords

• modular socket system
• amputation
• residual limb
• creep
• interface pressure