A FORCE- AND STRESS-DEFLECTION MODEL OF SERPENTINE FLEXURES FOR USE IN A COMPLIANT BONE PLATE

Connor Huxman, Jared Butler

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Serpentine flexures offer several advantages for use in linear motion mechanisms, including distributed compliance to reduce stress and increase range of motion and manufacturability. In this work, we develop a model for predicting the moment, vertical deflection, and maximum stress experienced in both uniform and extended serpentine flexures in response to an input vertical force. Finite element validation demonstrates the model's ability to capture these three metrics across several flexure topologies with a mean error of 0.86%, while maintaining fixed-guided boundary conditions for flexures with any number of horizontal segments. Finally, the model's utility is demonstrated in the design of a novel single-piece compliant fracture fixation plate that leverages serpentine flexures to deliver controlled axial motion for long bone healing. Model-derived stress-equivalent flexures are compared in their transverse and torsional rigidity. The proposed model and specific findings can be leveraged to design linear motion mechanisms that incorporate serpentine flexures across a wide range of applications.

Original languageEnglish (US)
Title of host publication47th Mechanisms and Robotics Conference (MR)
PublisherAmerican Society of Mechanical Engineers (ASME)
ISBN (Electronic)9780791887363
DOIs
StatePublished - 2023
EventASME 2023 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2023 - Boston, United States
Duration: Aug 20 2023Aug 23 2023

Publication series

NameProceedings of the ASME Design Engineering Technical Conference
Volume8

Conference

ConferenceASME 2023 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2023
Country/TerritoryUnited States
CityBoston
Period8/20/238/23/23

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Computer Graphics and Computer-Aided Design
  • Computer Science Applications
  • Modeling and Simulation

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