Accurate Equivalent Beam Model of a Planar Compliant Mechanism with Elliptical Flexure Hinges

Author

Zhang, Zhaocheng ; Hu, Hong

Author_Institution

Dept. of Mech. Eng. & Autom., Harbin Inst. of Technol., Shenzhen, China

Volume

3

fYear

2009

fDate

11-12 April 2009

Firstpage

11

Lastpage

14

Abstract

An accurate and efficient equivalent beam model(EBM) for a planar compliant mechanism with ellipticalflexure hinges is presented. First, based on 3D finite element analysis (FEA) for one-eighth of a single elliptical flexure hinge, a set of fictitious beams with identical stress and stiffness characteristics is derived. Then the static and dynamic performances of an eight-bar compliant mechanism with elliptical flexure hinges are studied based on the EBM and 2D FEA under either the plane stress or plane strain assumptions. Compared with the results of 2D FEA, the EBM has the advantages of high efficiency and good accuracy.

Keywords

bars; elastic constants; fasteners; finite element analysis; stress analysis; FEA; dynamic performances; elliptical flexure hinges; equivalent beam model; finite element analysis; planar compliant mechanism; static performances; stiffness characteristics; stress characteristics; Automation; Capacitive sensors; Fasteners; Finite element methods; Geometry; Mechanical engineering; Mechanical variables measurement; Mechatronics; Solid modeling; Stress; compliant mechanism; elliptical flexure hinge; equivalent beam model; finite element analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Measuring Technology and Mechatronics Automation, 2009. ICMTMA '09. International Conference on

Conference_Location

Zhangjiajie, Hunan

Print_ISBN

978-0-7695-3583-8

Type

conf

DOI

10.1109/ICMTMA.2009.363

Filename

5203136