Topological Synthesis of Compliant Mechanisms Using Multi-Criteria Optimization

Frecker, Mary; Ananthasuresh, G. K.; Nishiwaki, Shinji; Kikuchi, Noboru; Kota, Sridhar

doi:10.1115/1.2826242

Cited by 409 publications

(223 citation statements)

References 9 publications

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“…3a. To implement this function in the flexible structure, we must take into account two requirements: the kinematic requirement and the structural requirement, as Frecker et al (1997) explained. The kinematic requirement is identical to our design specification mentioned above.…”

Section: Fig 2 An Elastic Body Subjected To Two Tractionsmentioning

confidence: 99%

Topological design considering flexibility under periodic loads

Nishiwaki

Min

Kikuchi

2000

Structural and Multidisciplinary Optimization

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Topology optimization has been extensively considered to design the structural configuration for the stiffness maximization and the eigenfrequency maximization. In this paper, we construct a topology optimization method implementing flexibility with the time-periodic loading condition. First, the flexibility in the dynamic periodic loading is formulated using the mutual energy concept. Second, the multi-optimization problem is formulated using a new multi-objective function in order to obtain an optimal solution incorporating both flexibility and stiffness. Next, the topology optimization procedure is developed using the homogenization design method. Finally, some examples are provided to confirm the optimal design method presented here.

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Section: Fig 2 An Elastic Body Subjected To Two Tractionsmentioning

confidence: 99%

Topological design considering flexibility under periodic loads

Nishiwaki

Min

Kikuchi

2000

Structural and Multidisciplinary Optimization

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“…[11][12]. A search region of this size took ≈12 hr to complete 275 generat ons us ng the hardware described previously.…”

Section: Example: 450 Block Designmentioning

confidence: 99%

“…8,9 It has s nce been appl ed to compliant mechanism optimization by a variety of researchers including Zhou and Rozvany, Frecker et al, Joo and Kota, Poulsen, Pederson et al, Bruns and Tortorelli, and Ananthsuresh and Kota to name just a few. [10][11][12][13][14][15][16] Structural optimization using this method is essentially a consideration of all possible combinations of the material connectivity, as defined by the design parameters in the design domain, which meets the basic design criteria. This procedure brings a multitude of possible designs into view of the designer with the optimum material connectivity for a specified task to be determined by the optimization procedure.…”

Section: Introductionmentioning

confidence: 99%

Evolutionary optimization of a geometrically refined truss

Hull

Tinker

Dozier

2006

Struct Multidisc Optim

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“…Compliant mechanisms will allow the user to design a device using a smart material. Such designs will take advantage of both properties of device compliance as well as properties of smart material (Frecker, 1997).…”

Section: The Future Of Mems Technologies and Applicationsmentioning

confidence: 99%

“…This research investigation focuses primarily on fully compliant mechanisms, however; it is important to introduce these models to provide a comprehensive approach to compliant mechanism design. Ananthasuresh, Kota, and Kikuchi (1994) and Frecker et al (1997) introduced a four-step synthesis procedure for designing fully compliant mechanisms. These steps include (1) minimizing compliance for a given weight, (2) maximizing compliance for a given weight, (3) minimizing deflection at the point of interest for a given weight, and (4) minimizing deflection at the point of interest in conjunction with bounds of compliance.…”

Section: Topological Synthesis and Development Of Compliant Mechanismsmentioning

confidence: 99%

Design of Surface micromachined Compliant MEMS

Bradley

2001

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LIST OF TABLES Problems with MEMSWhen developing MEMS, there are five main points of concern: (1) understanding and controlling the material properties of microstructure polycrystalline silicon films, (2) release of the microstructure, (3) material etch rates, (4) constraints defined by the combination of micromachining and integrated circuit fabrication technology, and (5) practices when packaging the completed devices (Shibaike, 1995;Rai-Choudhury, 1997). MEMS technologies represent a new field that is positioned to revolutionize many products and move forward the development of better micro-component subsystems. Compliant DevicesWhen deploying a mechanical device, I hope to achieve motion, good strength, and low cyclic failure. This entails the transmission or use of forces that cause some form of deformation (Snelling & Erdman, 1974). At the macro-scale, distribution of forces is often accomplished by employing linkages, joints, and other components. In some cases this might require several linkages and configurations to achieve a desired output and functionality. Research has shown that a new family of devices called, "compliant mechanisms" (Midha, 1988) are able to produce desired functionality with just a few components. Thus, my research focuses primarily on creating a device that doesn't require a great deal The success of a compliant mechanism is determined by the device configuration. It is most important to develop a suitable topology, shape, and size. Two approaches proposed by G.K. Ananthasuresh (1995) discuss design optimization routines. One such method focuses on a kinematics-based approach when the topology of the compliant mechanism is known at the start and is approximated using a rigid body model. The second approach uses the continuum models and structural optimization algorithms to determine the topology of a fully compliant mechanism satisfying the functional behavior.Several other models have been proposed to provide a more systematic methodology to compute a suitable configuration. These other methods will be briefly discussed in chapter 2.In this investigation a micro-compliant gripper and micro-compliant clamp design are constructed. A study of the optimization design process, material selection, design factors, and fabrication processes for both designs are 13 investigated. The goal is to build a toolkit to optimize the best design independent of the fabrication process for compliant MEMS. This should facilitate a functional and analytical procedure that will make a seamless conversion process from non-compliant micro-mechanisms to compliant micro-mechanisms.The optimal compliant mechanism is a compromise between good stiffness and flexibility. If too flexible, it will not transmit a suitable force; if too stiff, it will not deform easily.

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Topological Synthesis of Compliant Mechanisms Using Multi-Criteria Optimization

Cited by 409 publications

References 9 publications

Topological design considering flexibility under periodic loads

Topological design considering flexibility under periodic loads

Evolutionary optimization of a geometrically refined truss

Design of Surface micromachined Compliant MEMS

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