Abstract
Ionic polymer metal composites (IPMCs) are an emerging class of electroactive polymers (EAP), which have many potential applications as sensors and actuators. Recently, IPMCs have been intensively studied because of their huge potential in medical, mechanical, electronic, and aerospace engineering. However, before the benefits of these materials can be effectively exploited for practical use, a mathematical model must be established to enhance understanding and predictability of IPMC actuation. The coupled electrical-chemical-mechanical response of an IPMC depends on the structure of the polyelectrolyte membrane, the morphology and conductivity of the metal electrodes, the cation properties, and the level of hydration. With this in mind, the purpose of this study is to establish a finite element model for bending behavior of IPMC beams. With reference to their operation principle, it is assumed that an IPMC beam has three virtual layers. We draw an analogy between thermal strain and real strain in IPMC due to volume change. This is a coupled structure/thermal model, and the finite element method is used to solve this model. The ion concentration distribution in the IPMC boundary layer is mimicked with the temperature distribution, and the electromechanical coupling coefficient is mimicked with the thermal expansion coefficient. Theoretical and experimental results demonstrate that our suggested model is practical and effective enough in predicting the blocking force of IPMC strips for different input voltages and strip thicknesses.
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References
Cohen, Y. B., “Electric flex,” IEEE Spectrum, Vol. 41, No. 6, pp. 29–33, 2004.
Tadokoro, S., Yamagami, S. and Ozawa, M., “Soft micromanipulation device with multiple degrees of freedom consisting of high polymer gel actuators,” Proc. of IEEE International Conference on Micro Electro Mechanical Systems, pp. 37–42, 1999.
Guo, S., Fukuda, T. and Asaka, K., “A new type of fish-like underwater microrobot,” IEEE/ASME Transactions on Mechatronics, Vol. 8, No. 1, pp. 136–141, 2003.
Shahinpoor, M. and Kim, K., “Ionic polymer-metal composites: IV. Industrial and medical applications,” Smart Materials and Structures, Vol. 14, No. 1, pp. 197–214, 2005.
Yamakita, M., Kamamichi, N., Kozuki, T., Asaka, K. and Luo, Z., “Control of biped walking robot with IPMC linear actuator,” Proc. of the IEEE/ASME International Conference on Advanced Intelligent Mechatronics, pp. 48–53, 2005.
Tan, X., Kim, D., Usher, N., Laboy, D., Jackson, J., Kapetanovic, A., Rapai, J., Sabadus, B. and Zhou, X., “An autonomous robotic fish for mobile sensing,” Proc. of the IEEE/RSJ International Conference on Intelligent Robots and Systems, pp. 5424–5429, 2006.
Chen, Z., Shen, Y., Xi, N. and Tan, X., “Integrated sensing for ionic polymer-metal composite actuators using PVDF thin films,” Smart Materials and Structures, Vol. 16, No. 2, pp. S262–S271, 2007.
Rolfe, P., Sun, J., Scopesi, F. and Serra, G., “Bioengineering aspects of sensors and Instruments for continuous monitoring of the venitilated newborn,” IJPEM, Vol. 10, No. 1, pp. 49–54, 2009.
Zhou, J. W. L., Chan, H.-Y., To, T. K. H., Lai, K. W. C. and Li, W. J., “Polymer MEMS actuators for underwater micromanipulation,” IEEE/ASME Transactions on Mechatronics, Vol. 9, No. 2, pp. 334–342, 2004.
Shahinpoor, M., “Micro-electro-mechanics of ionic polymer gels as electrically controllable artificial muscles,” J. Intell. Mater. Syst. Struct., Vol. 6, No. 3, pp. 307–314, 1995.
Nemat-Nasser, S. and Li, J. Y., “Electromechanical response of ionic polymer-metal composites,” J. Appl. Phys. Vol. 87, No. 7, pp. 3321–3331, 2000.
Nemat-Nasser, S., “Micromechanics of actuation of ionic polymer-metal composites,” J. Appl. Phys., Vol. 92, No. 5, pp. 2899–2915, 2002.
Johnson, T. and Amirouche, F., “Multiphysics modeling of an IPMC microfluid control device,” Microsys. Technol., Vol. 14, No. 6, pp. 871–879, 2008.
Wang, Q. and Xu, B., “Nonlinear piezoelectric behavior of ceramic bending mode actuator under strong electric fields,” J. Appl. Phys., Vol. 86, No. 6, pp. 3352–3360, 1999.
Xiao, Y. and Bhattacharya, K., “Modeling electromechanical properties of ionic polymers,” Proc. SPIE, Vol. 4329, pp. 292–300, 2001.
Lee, S., Park, H. C. and Kim, K. J., “Equivalent modeling for ionic polymer-metal composite actuators based on beam theory,” Smart Materials and Structures, Vol. 14, No. 6, pp. 1363–1368, 2005.
Mets, P., Alici, G. and Spinks, G. M., “A finite element model for bending behavior of conduction polymer electromechanical actuators,” Sensors and Actuators A: Physical, Vol. 130-131, pp. 1–11, 2006.
Yoon, W. J., Reinhall, P. G. and Seibel, E. J., “Analysis of electro-active polymer bending: A component in a low cost ultrathin scanning endoscope,” Sensors and Actuators A: Physical, Vol. 133, No. 2, pp. 506–517, 2007.
Toi, Y. and Kang, S-S., “Finite element analysis of two-dimensional electrochemical-mechanical response of ionic conduction polymer-metal composite beams,” Computers and Structures, Vol. 83, No. 31–32, pp. 2573–2583, 2005.
Nemat-Nasser, S. and Li, J. Y., “Electromechanical response of ionic polymer composites,” Proc. of SPIE, Vol. 3987, pp. 82–91, 2000.
Tadokoro, S., Takamori, T. and Oguro, K., “An actuator model of ICPF (Ionic Conducting Polymer Film) for robotic applications on the basis of physicochemical hypotheses,” Proc. of 2000 IEEE international conference of robotics and automation, Vol. 2, pp. 1340–1346, 2000.
Popovic, S. and Taya, M., “Modeling of Nafion-Pt actuator in dry condition,” Ph.D. thesis, Department of Mechanical Engineering, University of Washington.
ANSYS, “Various couple field analysis using ANSYS: Training Manual,” 2005.
Lee, S. J., Han, M. J. and Kim, Y. H., “A new fabrication method for IPMC actuators and application to artificial fingers,” Smart Materials and Structures, Vol. 15, No. 5, pp. 1217–1224, 2006.
Kim, J. K. and Shahinpoor, M., “Ionic polymer-metal composite: II. Manufacturing Techniques,” Smart Materials and Structures, Vol. 12, No. 1, pp. 65–79, 2003.
Lee, S. G., Park, H.-C., Pandita, S. D. and Yoo, Y., “Performance improvement of IPMC (Ionic Polymer Metal Composites) for a flapping actuator,” International Journal of Control, Automation, and Systems, Vol. 4, No. 6, pp. 748–755, 2006.
Akle, B. and Leo, D. J., “Electromechanical transduction in multilayer ionic transducers,” Smart Materials and Structures, Vol. 13, No. 5, pp. 1081–1089, 2004.
Malone, E. and Lipson, H., “Freeform fabrication of electroactive actuators and electromechanical devices,” Proc. of the 15th Solid Freeform Fabrication Symposium, pp. 697–708, 2004.
Barramba, J., Silva, J. and Costa Branco, P. J., “Evaluation of dielectric gel coating for encapsulation of ionic polymer-metal composite (IPMC) actuators,” Sensors and Actuators A: Physical, Vol. 140, No. 2, pp. 232–238, 2007.
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Lughmani, W.A., Jho, J.Y., Lee, J.Y. et al. Modeling of bending behavior of IPMC beams using concentrated ion boundary layer. Int. J. Precis. Eng. Manuf. 10, 131–139 (2009). https://doi.org/10.1007/s12541-009-0104-2
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DOI: https://doi.org/10.1007/s12541-009-0104-2