TY - GEN
T1 - A FORCE- AND STRESS-DEFLECTION MODEL OF SERPENTINE FLEXURES FOR USE IN A COMPLIANT BONE PLATE
AU - Huxman, Connor
AU - Butler, Jared
N1 - Publisher Copyright:
© 2023 American Society of Mechanical Engineers (ASME). All rights reserved.
PY - 2023
Y1 - 2023
N2 - 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.
AB - 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.
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U2 - 10.1115/DETC2023-115051
DO - 10.1115/DETC2023-115051
M3 - Conference contribution
AN - SCOPUS:85178603660
T3 - Proceedings of the ASME Design Engineering Technical Conference
BT - 47th Mechanisms and Robotics Conference (MR)
PB - American Society of Mechanical Engineers (ASME)
T2 - ASME 2023 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference, IDETC-CIE 2023
Y2 - 20 August 2023 through 23 August 2023
ER -