Hybrid compliant mechanisms provide a way to integrate lumped compliance and distributed compliance together for better performance. This paper proposes a framework for the systematic analysis and synthesis of hybrid compliant mechanisms to facilitate the integration of lumped compliance and distributed compliance. A new type of finite element, i.e., super flexure hinge element, was incorporated with classic beam elements, leading to a new topology optimization technique for the design of hybrid compliant mechanisms. The new element is called super flexure hinge element or flexure hinge element. Compared with ANSYS results, the proposed element is efficient and accurate. With the super flexure hinge element, an investigation on the effects of the location and size of a flexure hinge in a simple compliant mechanism explains why the problem of point flexures often occurs when the conventional stiffness-flexibility criteria are used in topology optimization. Two design examples (force inverter design and displacement amplifier design) were presented to verify the proposed topology optimization technique. The effects of link widths and hinge radii were also investigated. The results indicate that the use of the proposed element makes the analysis and synthesis of hybrid compliant mechanisms more efficient and accurate. The proposed element and the topology optimization technique allow designers to take advantages of flexure hinges meanwhile to control the generations (locations, sizes) of flexure hinges in the topology optimization process. Improved results were obtained by adjusting associated parameters, e.g., link widths and hinge radii.
Hybrid Compliant Mechanism Design Using a Mixed Mesh of Flexure Hinge Elements and Beam Elements through Topology Optimization
Journal of mechanical design ; 137 , 9 ; 92303
2015
Aufsatz (Zeitschrift)
Englisch
BKL: | 50.15 Konstruktionslehre / 52.15 Maschinenelemente, Maschinenbaugruppen / 52.20 Antriebstechnik, Getriebelehre | |
Lokalklassifikation TIB: | 770/5315/5330 |
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