Elastic and magneto-elastic modeling of Galfenol nanowires

Chaitanya Mudivarthi; Patrick Downey; Alison B. Flatau

doi:10.1117/12.715296

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11 April 2007 Elastic and magneto-elastic modeling of Galfenol nanowires

Chaitanya Mudivarthi, Patrick Downey, Alison B. Flatau

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Proceedings Volume 6528, Nanosensors, Microsensors, and Biosensors and Systems 2007; 652803 (2007) https://doi.org/10.1117/12.715296
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2007, San Diego, California, United States

Abstract

This paper presents a magneto-elastic model developed by coupling a finite element elastic and magnetic formulations with an energy based probabilistic magnetostrictive model. Unidirectional coupled model is presented first for both sensor and actuator applications and then a fully coupled bidirectional model is developed. The unidirectional sensor model was validated against experimental results for a 1.58 mm diameter and 32.74 mm long Galfenol cantilever beam. The model was further used to investigate the response of Galfenol nanowire array that will be used in a nanowire acoustic sensor. Model predictions suggest that differences in the phase of bending motion of nanowires in an array will not produce a significant effect on the magnetic response of the array. It also predicts that the response of a single nanowire can be measured by a magnetic sensor with active measurement area much larger than the nanowire dimensions.

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Chaitanya Mudivarthi, Patrick Downey, and Alison B. Flatau "Elastic and magneto-elastic modeling of Galfenol nanowires", Proc. SPIE 6528, Nanosensors, Microsensors, and Biosensors and Systems 2007, 652803 (11 April 2007); https://doi.org/10.1117/12.715296

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