Computational model of Achilles tendon

Abstract

The comparative study done aimed to investigate the substitution of the human Achilles tendon with a synthetic made one. By creating a Finite-Element model, the simulations included 4 different types of material to compare with the human tissue: carbon fiber, low density polyethylene, flax and hemp. 3 different cases were chosen from the human walking gate cycle, based on how critical they are, and the magnitude of force implied in that moment. One of those cases was compared between normal walking and running phases, to imitate eccentric and passive loading. The tissue displacement, equivalent stress (Von-Mises) and shear stress were all investigated in this design of prosthetic tendon. Deformations were found to be non-uniform in these materials too with the superficial portions of the tendon deforming less than the mid and deep portions. Under these conditions, carbon fiber and hemp were found to be the best solutions between the 4 materials, although further studies are needed before carrying on with testing.