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Pseudo-rigid-body model for corrugated cantilever beam used in compliant mechanisms

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Abstract

Common compliant joints generally have limited range of motion, reduced fatigue life and high stress concentration. To overcome these shortcomings, periodically corrugated cantilever beam is applied to design compliant joints. Basic corrugated beam unit is modeled by using pseudo-rigid-body method. The trajectory and deformation behavior of periodically corrugated cantilever beam are estimated by the transformation of coordinate and superposition of the deformation of corrugated beam units. Finite element analysis(FEA) is carried out on corrugated cantilever beam to estimate the accuracy of the pseudo-rigid-body model. Results show that the kinetostatic behaviors obtained by this method, which has a relative error less than 6%, has good applicability and corrugated cantilever beam has the characteristics of a large range of motion and high mechanical strength. The corrugated cantilever beam is then applied to design a flexible rotational joint to obtain a larger angle output. The paper proposes a pseudo-rigid-body model for corrugated cantilever beam and designed a flexible rotational joint with large angle output.

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Author information

Authors and Affiliations

  1. Guangdong Province Key Laboratory of Precision Equipment and Manufacturing Technology, South China University of Technology, Guangzhou, 510641, China

    Nianfeng Wang, Xiaohe Liang & Xianmin Zhang

  2. State Key Laboratory of Mechanical System and Vibration, Shanghai Jiao Tong University, Shanghai, 200240, China

    Nianfeng Wang

Authors
  1. Nianfeng Wang
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  2. Xiaohe Liang
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  3. Xianmin Zhang
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Corresponding authors

Correspondence to Nianfeng Wang or Xianmin Zhang.

Additional information

This project is supported by National Natural Science Foundation of China (Grant Nos. 51205134, 91223201), Doctoral Fund of Ministry of Education of China (Grant No. 20120172120001), Research Project of State Key Laboratory of Mechanical System and Vibration of China (Grant No. MSV201405), Guangdong Province Universities and Colleges Pearl River Scholar Funded Scheme (GDUPS, 2010), and Fundamental Research Funds for the Central Universities (Grant No. 2013ZM012)

WANG Nianfeng, born in 1977, is currently an associate professor at South China University of Technology, China. He received his PhD degree from Nanyang Technological University, Singapore, in 2008. His research interests include compliant mechanism, structural optimization and robotics.

LIANG Xiaohe, born in 1989, is currently a master candidate at South China University of Technology, China. His research interests include compliant mechanism, precision equipment.

ZHANG Xianmin, born in 1964, is currently a professor at South China University of Technology, China. He received his PhD degree from Beihang University, China, in 1997. His research interests include mechachonics engineering, compliant mechanism.

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Wang, N., Liang, X. & Zhang, X. Pseudo-rigid-body model for corrugated cantilever beam used in compliant mechanisms. Chin. J. Mech. Eng. 27, 122–129 (2014). https://doi.org/10.3901/CJME.2014.01.122

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  • DOI: https://doi.org/10.3901/CJME.2014.01.122

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