Efficient spatial compliance analysis of general initially curved beams for mechanism synthesis and optimization
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Accepted Version
Date
2021-04-09
Authors
Wu, Ke
Zheng, Gang
Hao, Guangbo
Journal Title
Journal ISSN
Volume Title
Publisher
Elsevier B.V.
Published Version
Abstract
Compliant Mechanisms (CMs) present several desired properties for mechanical designs. Conventional rigid-body mechanisms composed of rigid links connected at kinematic joints, serve as devices to transfer motion, force and energy by the movements of rigid links whereas CMs are able to present the same function only through deflection of flexible members. Most designs of CMs in the current literature employ straight beams as the elementary flexible members whereas initially curved beams (ICBs) also provide potential advantages for CMs such as large range of motion and small strain range. This paper presents an efficient spatial compliance analysis method of general ICBs. The spatial compliance analysis of different types of ICBs (such as varying-curvature beams and varying-cross-section beams) was conducted, followed by Finite Element Analysis (FEA) verification. Next, the modeling and optimization of two types of CMs including ICB-based parallelogram mechanisms and ICB-based Ortho-planar springs were carried out by applying screw theory under the framework of position space concept and parameter normalization strategy where a class of anti-buckling translational parallelograms with high load-bearing capacity and a type of compact 2R1T (2 rotational DOF and 1 translational DOF) compliant kinematic joints were obtained. The corresponding FEA was conducted to verify the optimal results.
Description
Keywords
Compliance analysis , Compliant mechanisms , ICB-based parallelogram , Initially curved beams (ICBs) , Optimization , Ortho-planar spring
Citation
Wu, K., Zheng, G. and Hao, G. (2021) 'Efficient spatial compliance analysis of general initially curved beams for mechanism synthesis and optimization', Mechanism and Machine Theory, 162, 104343 (22pp). doi: 10.1016/j.mechmachtheory.2021.104343