This work investigates the compliance of a novel flexure hinge mechanism for tissue cutting. This hinge is to be used with ultrasonic axial vibration to induce transverse displacement. This transverse motion can aid in reducing tissue cutting force as well as possible target deflection by reducing the parallel tissue cutting force. The finite element method, FEM, is used to evaluate several flexural hinge designs to develop empirical equations for the compliance in the axial, transverse, and rotational directions. To generate appreciable transverse motion from an axially applied ultrasonic vibration an asymmetric flexural hinge is needed. In order to design an asymmetric complaint mechanism to fully take advantage of the transverse cutting motion the compliance with respect to geometry was explored. The ratio of thickness, length, and distance between the hinges were iterated while end loads were applied to derive the compliance equations. The empirical models are presented for each design study. It is shown that the rotational stiffness is the dominating factor of the stiffness matrix. It is also shown that the relationship between the rotational stiffness and the distance between hinges forms a piecewise equation. This is due to notch elements spaced close to each other can be modeled as a lumped element while notch elements spaced further apart need to be independently modeled.
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ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing
June 4–8, 2017
Los Angeles, California, USA
Conference Sponsors:
- Manufacturing Engineering Division
ISBN:
978-0-7918-5075-6
PROCEEDINGS PAPER
Asymmetric Flexure Hinge for Compliant Vibrational Tissue Cutting Available to Purchase
Justin A. Jones,
Justin A. Jones
Pennsylvania State University, University Park, PA
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Yuan-Shin Lee,
Yuan-Shin Lee
North Carolina State University, Raleigh, NC
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Jason Z. Moore
Jason Z. Moore
Pennsylvania State University, University Park, PA
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Justin A. Jones
Pennsylvania State University, University Park, PA
Yuan-Shin Lee
North Carolina State University, Raleigh, NC
Jason Z. Moore
Pennsylvania State University, University Park, PA
Paper No:
MSEC2017-2850, V004T05A004; 7 pages
Published Online:
July 24, 2017
Citation
Jones, JA, Lee, Y, & Moore, JZ. "Asymmetric Flexure Hinge for Compliant Vibrational Tissue Cutting." Proceedings of the ASME 2017 12th International Manufacturing Science and Engineering Conference collocated with the JSME/ASME 2017 6th International Conference on Materials and Processing. Volume 4: Bio and Sustainable Manufacturing. Los Angeles, California, USA. June 4–8, 2017. V004T05A004. ASME. https://doi.org/10.1115/MSEC2017-2850
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