Characterization of magnetostrictive iron-gallium alloys under dynamic conditions
Creators:Poeppelman, Craig D.
Advisor:Dapino, Marcelo J.
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Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Mechanical Engineering Honors Theses; 2010
Galfenol alloys, Fe(1-x)Ga(x), are a class of smart materials with favorable magnetostriction (300 με) and mechanical robustness. Previous research has focused on static characterization of the material, but proposed applications operate in dynamic environments. In this work, a magnetomechanical transducer has been designed and constructed to conduct measurements of Galfenol samples 0.25 inches in diameter and 2.9 inches in length. The transducer was developed to conduct actuation and sensing measurements at both static and dynamic conditions. The corresponding measurement system was developed. This system has the ability to drive and measure the electrical, mechanical, and magnetic parameters of the system for both actuating and sensing measurements. Quasi static tests were conducted to verify the effectiveness of the transducer and measurement system. Dynamic actuation tests were also completed as a first step to characterizing Galfenol under dynamic conditions. Advisor: Marcelo J. Dapino