Material/Process Selection of Prosthetic Limp

As part of the "Materials in Design" engineering course, this project investigated redesigning the prosthetic limp (both permanent high-cost and temporary low-cost ones) to account for failures observed by the literature using CES (material/process selection software). The main causes of failure in prosthetic limps as reported in the literature are: wear, inflammation (infection) due to low-to-med level corrosion and stress-shielding/bone -weakening due to higher mechanical properties of implants as compared to bones. 

 

Accordingly, my team identified 4 key design objectives for the prosthetic limps that will guide the design process on CES. Those design objectives are: 1- minimize friction 2- Maximize hardness 3- Minimize corrosion 4- Maximize Osseointegration through syncing the mechanical properties of the implants to that of the human bones. Based on these objectives, my team produced CES Material & process selection charts for the desired properties of each component of the limp (shown in the photo gallery) and recommended certain materials and processes for each component of the prosthetic limp whether permanent on temporary (shown in the table below) 

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