Mr. James Davis Profile

James Davis

at Univ of Texas at Tyler

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Proceedings Article | 22 March 2021 Presentation + Paper

Design and performance simulation of a triboelectric energy harvester for total hip replacement implants

James Davis, Mohammad Atmeh, Nael Barakat, Alwathiqbellah Ibrahim

Proceedings Volume 11593, 115930Y (2021) https://doi.org/10.1117/12.2583343

KEYWORDS: Energy harvesting, Head, Optimization (mathematics), Motion models, Finite element methods, Dielectrics

Read Abstract +

Total Hip Replacement (THR) involves a conventional medical implant where many interacting factors could cause patient dissatisfaction, sometimes leading to lengthy and risky procedures based on guesses. Energy harvesting from natural human motion is being investigated to create a reliable source that will power smart implants and monitor performance simultaneously without any replacement or exchanges. A novel design of Triboelectric Energy Harvester (TEH) is proposed to retrofit a TEH to the THR implant, making it a smart implant. A custom femoral head was designed to incorporate grooves onto the THR femoral head, maximizing energy production without increasing the overall size. The TEH consists of two Titanium layers separated by a PDMS insulator. The Finite Element Analysis shows that the mechanical spring maintains the contact separation motion of the TEH. A theoretical model of a single-degree-of-freedom system with piecewise functions is proposed based on the FEA results to model the contact and release modes and voltage estimations. This study can open the door and lead to new research in load monitoring for total hip replacement.

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