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- W1978282012 abstract "Microtools offer significant promise in a wide range of applications such as cell manipulation, microsurgery, nanotechnology processes, and many other fields. The development of these microtools is still in the initial stages and it can be strongly enhanced by using design tools. The microtools considered in this paper essentially consist of a multi-flexible structure actuated by two or more piezoceramic devices such that when each piezoceramic is actuated, it generates an output displacement and force in a specified point of the domain and direction. The multi-flexible structure acts as a mechanical transform by amplifying and changing the direction of the piezoceramic output displacements. Thus, the development of microtools requires the design of actuated flexible structures that can perform complex movements. In addition, when multiple piezoceramic devices are involved, coupling effects in their movements become critical, especially the appearance of undesired movements, which makes the design task very complex. One way to avoid such undesirable effects is the use of a systematic design method, such as topology optimization, with appropriate formulation of the optimization problem. Here, a topology optimization formulation is developed for the design of microtools actuated by multiple piezoceramics that minimizes the effects of movement coupling. This method is implemented based on the CAMD (continuous approximation of material distribution) approach where fictitious densities are interpolated in each finite element, providing a continuum material distribution in the domain. In addition, in previous piezoelectric actuator topology optimization works the piezoceramics were excited by charge, which is not realistic, even though it simplifies the sensitivity analysis. In this work, the piezoceramics are excited by voltage and the corresponding sensitivity analysis is presented. Different types of microtools required for various applications are designed to demonstrate the usefulness of the proposed method. Although the presented examples are limited to two-dimensional models, this is appropriate since most of the applications for such microtools are planar devices." @default.
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- W1978282012 date "2005-11-09" @default.
- W1978282012 modified "2023-10-18" @default.
- W1978282012 title "Design of piezoelectric multi-actuated microtools using topology optimization" @default.
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- W1978282012 doi "https://doi.org/10.1088/0964-1726/14/6/036" @default.
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