DEVELOPMENT AND ANALYSIS OF PROSTHETIC FOOT BY A NEW IDEA

• Published in: Journal of mechanics in medicine and biology Vol. 22; no. 6
• Main Author: MOHAMMED, HASAN SAAD
• Format: Journal Article
• Language: English
• Published: Singapore World Scientific Publishing Company 01.08.2022; World Scientific Publishing Co. Pte., Ltd
• Subjects: Finite element method; High density polyethylenes; Impact strength; Impact tests; Low density polyethylenes; Mechanical properties; Mechanical tests; Polyethylene; Prostheses; Weight reduction; Yield stress; Prosthetic design; prosthetic feet; CAM; CAD; lower limb orthotics
• ISSN: 0219-5194; 1793-6810
• DOI: 10.1142/S0219519422500403

The procedure involved in evolving a compound that was utilized for producing prosthetic foot with mechanical characteristics and a sensible price is presented. Compound’s characteristics such as Charpy impact strength and tensile were investigated using mechanical tests. During this procedure 10% linear low density polyethylene (LLDPE) was added to 90% high-density polyethylene (HDPE). This reduced the energy impact as well as ultimate yield stress whilst elongated at break from 27% in comparison to those of pure HDPE. Prostheses properties were further studied in comparison to human foot. The analytical part indicates the static analysis outcomes by experimental as well as finite element methods (ANSYS Workbench 14). Thus, the foot was formed, and dorsiflexion was measured. Overall, the nonarticulated (HDPE and LLDPE) foot was compared to SACH foot by cost and weight. It was found that the nonarticulated foot’s weight was lighter by 2% and its cost was lower than SACH foot by approximately 60%. The nonarticulated foot has great properties, for instance a life of foot cycles (9∘ and 2,193,228) as well as good dorsiflexion in comparison to SACH foot with 6.4 ∘ and 896,213 life of foot cycles.