Abstract
Ionic Polymer Metal Composites (IPMCs) are a group of electroactive polymer materials that exhibit a large deformation due to the application of low voltages resulting from the movement of cations inside the polymer. These materials have many applications in various fields such as Micro-robotics, biomedical engineering equipment and artificial muscles. Due to the possibility of producing these materials in micro dimensions they can also be used in micro-electromechanical systems. On the other hand, due to their sensitivity to very low voltages, they can be a good substitute for silicon in micro-electromechanical systems. In the present study, the dynamical analysis of a micro-beam fixed at two ends made of these materials is investigated using electrical-chemical-mechanical relations. COMSOL Multiphysics software is used to solve the relations. The results showed that for harmonic stimulation (sinusoidal voltage) the system experiences only the same form of the first mode. It was also observed that increasing the frequency would decrease the amplitude of the micro-beam oscillation.
Highlights
There are many type of composites which have been used in different aspects [1], like Nanocomposites [2], Ionic polymer composites and so forth
Ionic Polymer Metal Composites (IPMCs) are consisted of a polymer membrane surrounded by two metal electrodes, that can be produced in various sizes and dimensions depending on the intended use
A physical model based on electrochemical equations has been used in this study to analyze and predict the dynamic behavior of IPMC actuator
Summary
There are many type of composites which have been used in different aspects [1], like Nanocomposites [2], Ionic polymer composites and so forth. IPMCs are intelligent materials and their deformation results from the application of voltage to two electrodes, which leads to an electric field inside the polymer membrane causing the movement of ions [8,9]. Caponetto et al (2014) proposed a gray box model to identify the behavior of the target actuators [13] They modeled the nonlinear properties of this type of operator with an electric circuit. If the sample length changes in black or gray box model, it cannot predict the operator's behavior against different voltages [16] According to this point, a physical model based on electrochemical equations has been used in this study to analyze and predict the dynamic behavior of IPMC actuator. One of the main aspects of this study is nonlinear behavior and optimization, many ways are considered to be done like digital comparative holography which have been studied by Ahmadzadegan et al [59,60,61,62]
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