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Design of 3D printable prosthetic foot to implement nonlinear stiffness behavior of human toe joint based on finite element analysis

Title
Design of 3D printable prosthetic foot to implement nonlinear stiffness behavior of human toe joint based on finite element analysis
Author
김학성
Issue Date
2021-10
Publisher
NATURE PORTFOLIO
Citation
SCIENTIFIC REPORTS, v. 11, NO. 1, article no. 19780, Page. 1-11
Abstract
Toe joint is known as one of the critical factors in designing a prosthetic foot due to its nonlinear stiffness characteristic. This stiffness characteristic provides a general feeling of springiness in the toe-off and it also affects the ankle kinetics. In this study, the toe part of the prosthetic foot was designed to improve walking performance. The toe joint was implemented as a single part suitable for 3D printing. The various shape factors such as curved shape, bending space, auxetic structure, and bending zone were applied to mimic human foot characteristics. The finite element analysis (FEA) was conducted to simulate terminal stance (from heel-off to toe-off) using the designed prosthetic foot. To find the structure with characteristics similar to the human foot, the optimization was performed based on the toe joint geometries. As a result, the optimized foot showed good agreement with human foot behavior in the toe torque-angle curve. Finally, the simulation conditions were validated by comparing with human walking data and it was confirmed that the designed prosthetic foot structure can implement the human foot function.
URI
https://www.nature.com/articles/s41598-021-98839-3https://repository.hanyang.ac.kr/handle/20.500.11754/177397
ISSN
2045-2322
DOI
10.1038/s41598-021-98839-3
Appears in Collections:
COLLEGE OF ENGINEERING[S](공과대학) > MECHANICAL ENGINEERING(기계공학부) > Articles
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