Measurement and numerical analysis of the artificial muscles made of fishing line

Justin Murin1*, Vladimir Goga1, Juraj Hrabovsky1, Dalibor Buc2, Pavel Podesva1

1Institute of Automotive Mechatronics, Faculty of Electrical Engineering and Information Technology,  Slovak University of Technology in Bratislava, Ilkovičova 3, Bratislava, 812 19, Slovak Republic

2Institute of Electronics and Photonics, Faculty of Electrical Engineering and Information Technology,  Slovak University of Technology in Bratislava, Ilkovičova 3, Bratislava, 812 19, Slovak Republic

Adv. Mater. Lett., 2017, 8 (5), pp 635-640

DOI: 10.5185/amlett.2017.7105

Publication Date (Web): Apr 04, 2017

E-mail: justin.murin@stuba.sk

Abstract


This paper presents results of experimental and computational analysis of the artificial muscle (in form of coiled spring) made of nylon fishing line. By experimental measurement, the elasticity modules of chosen untwisted and twisted fishing line as well the spring constant of the coiled spring are found The prestressing force in the twisted line and the coiled spring is measured as well. The measured parameters are put into the analytical and Finite Element Method (FEM) computational model of the coiled spring to calculate the elongation that results from the applied mechanical load. Linear and non-linear numerical elastostatic analysis is performed. An expression is established for analytical calculation for the thermoelastic stroke of the muscle. A good agreement of the measured and calculated results is obtained. Contrary to analytical methods, FEM enables modeling and simulating complex mechanical structures that occur in biomechanical and mechatronic applications of the artificial muscles in a form of nylon springs.

Keywords

Artificial muscle, actuators and sensors, fishing line, computational modeling, simulation.

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