Flexure pivots are frequently applied in long stroke compliant mechanisms to transmit motion continuously. To improve the motion accuracy, a kind of variable thickness flexure pivot (VTFP) is proposed in this paper. A nonlinear beam element is proposed by utilizing the corotational approach to model the static response of the VTFP under end loads. Finite element analysis and experimental tests are carried out to verify the effectiveness of the modeling method. Based on the static deformation model, the motion range, the rotation stiffness, the center shift, and the variation of the center shift under axial force of the VTFP are investigated. The results show that the VTFP has better motion accuracy and better ability to resist axial force compared with the conventional flexure pivot.
Design and Modeling of a Variable Thickness Flexure Pivot
Contributed by the Mechanisms and Robotics Committee of ASME for publication in the JOURNAL OF MECHANISMS AND ROBOTICS. Manuscript received December 13, 2017; final manuscript received July 18, 2018; published online November 13, 2018. Assoc. Editor: Hai-Jun Su.
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Yang, M., Du, Z., Dong, W., and Sun, L. (November 13, 2018). "Design and Modeling of a Variable Thickness Flexure Pivot." ASME. J. Mechanisms Robotics. February 2019; 11(1): 014502. https://doi.org/10.1115/1.4041787
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