Designing Distributed Compliant Mechanisms With Characteristic Stiffness

Author:

Chen Shikui1,Wang Michael Yu2

Affiliation:

1. Northwestern University, Evanston, IL

2. Chinese University of Hong Kong, Shatin, N.T., Hong Kong, China

Abstract

A novel method is proposed in this paper to address the cutting-edge problem of topology optimization of distributed compliant mechanisms, which requires the design to possess both large output displacements and evenly distributed compliance simultaneously. The design is represented by a level-set model that precisely specifies the distinct material regions and their sharp interfaces as well as the geometric boundary of the structure, capable of performing topological changes and capturing geometric evolutions at the interface and the boundary. Existing techniques for eliminating de facto hinges in the design are reviewed. Further, the intrinsic deficiencies in the widely used “spring model” are discussed and a new formulation considering the “characteristic stiffness” of the mechanism is proposed. The proposed method is demonstrated with benchmark examples of compliant mechanism optimization. The result is a design with evenly distributed compliance and a more desirable characteristic, which uniquely distinguishes our method.

Publisher

ASMEDC

Cited by 26 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Topology optimization of the compliant mechanisms considering curved beam elements using metaheuristic algorithms;Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science;2022-03-22

2. Explicit structural topology optimization using moving wide Bezier components with constrained ends;Structural and Multidisciplinary Optimization;2021-02-19

3. Comparison of Concentrated and Distributed Compliant Elements in a 3D Printed Gripper;Towards Autonomous Robotic Systems;2021

4. Topology optimization of compliant mechanisms considering strain variance;Structural and Multidisciplinary Optimization;2020-06-30

5. Design of compliant revolute joints based on mechanism stiffness matrix through topology optimization using a parameterization level set method;Structural and Multidisciplinary Optimization;2019-05-18

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