Stiffness analysis of corrugated flexure beam used in compliant mechanisms

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• 作者：Nianfeng Wang ; Xiaohe Liang ; Xianmin Zhang
• 关键词：corrugated flexure beam ; stiffness analysis ; compliant mechanisms
• 刊名：Chinese Journal of Mechanical Engineering
• 出版年：2015
• 出版时间：July 2015
• 年：2015
• 卷：28
• 期：4
• 页码：776-784
• 全文大小：2,796 KB
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• 作者单位：Nianfeng Wang (1)
  Xiaohe Liang (1)
  Xianmin Zhang (1)
  
  1. Guangdong Province Key Laboratory of Precision Equipment and Manufacturing Technology, South China University of Technology, Guangzhou, 510641, China
  
• 刊物主题：Mechanical Engineering; Theoretical and Applied Mechanics; Manufacturing, Machines, Tools; Engineering Thermodynamics, Heat and Mass Transfer; Power Electronics, Electrical Machines and Networks; Electronics and Microelectronics, Instrumentation;
• 出版者：Springer Berlin Heidelberg
• ISSN：2192-8258

文摘

Conventional flexible joints generally have limited range of motion and high stress concentration. To overcome these shortcomings, corrugated flexure beam(CF beam) is designed because of its large flexibility obtained from longer overall length on the same span. The successful design of compliant mechanisms using CF beam requires manipulation of the stiffnesses as the design variables. Empirical equations of the CF beam stiffness components, except of the torsional stiffness, are obtained by curve-fitting method. The application ranges of all the parameters in each empirical equation are also discussed. The ratio of off-axis to axial stiffness is considered as a key characteristic of an effective compliant joint. And parameter study shows that the radius of semi-circular segment and the length of straight segment contribute most to the ratio. At last, CF beam is used to design translational and rotational flexible joints, which also verifies the validity of the empirical equations. CF beam with large flexibility is presented, and empirical equations of its stiffness are proposed to facilitate the design of flexible joint with large range of motion.