Title :
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
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;
Conference_Titel :
Measuring Technology and Mechatronics Automation, 2009. ICMTMA '09. International Conference on
Conference_Location :
Zhangjiajie, Hunan
Print_ISBN :
978-0-7695-3583-8
DOI :
10.1109/ICMTMA.2009.363
