Finite Element Magnetostatic Analysis of Magnetostrictive (Tb0.3Dy0.7Fe1.95) Actuator with Different Housing Materials

Raghavendra Joshi; Subba Rao M.; Ravikiran Kadoli

doi:10.14429/dsj.63.4868

Raghavendra Joshi National Institute of Technology, Surathkal
Subba Rao M. National Institute of Technology, Surathkal
Ravikiran Kadoli National Institute of Technology, Surathkal

DOI: https://doi.org/10.14429/dsj.63.4868

Keywords: Permeability of housing material, magnetostrictive actuator, Terfenol-D, Ansoft maxwell 2D solver

Abstract

Permeability of a housing material is one of the significant factors affecting the performance of Tb0.3Dy0.7Fe1.95 based magnetostrictive actuator. According to Lenz’s law the rate of flux transfer depends on permeability of housing material surrounding the terfenol-D. In this paper the co-axial coils in a free air are analysed under direct current excitation and the results are found to agree well with both analytical and Maxwell simulation. Also, the comparison of flux density distribution in co-axial coils placed inside different housing materials of magnetostrictive actuator is found by solving magnetostatic equations using Ansoft Maxwell 2D solver. The axial distribution of magnetic flux density, radial distribution of magnetic flux density and flux distribution in the actuator assembly with different housing materials namely mild steel, cast iron and aluminium with and without Terfenol-D are discussed.

Defence Science Journal, 2013, 63(4), pp.423-428, DOI:http://dx.doi.org/10.14429/dsj.63.4868

Author Biographies

Raghavendra Joshi, National Institute of Technology, Surathkal

Mr Raghavendra Joshi obtained his MTech (Machine Design) from Jawaharlal Nehru Technological University, Hyderabad. Presently, he is a research scholar in the Department of Mechanical Engineering, NIT, Surathkal. His areas of research are: Hysteresis modeling and applications of magnetostrictive materials, vibration and conditioning monitoring.

Subba Rao M., National Institute of Technology, Surathkal

Mr Subba Rao M obtained his MTech (Manufacturing Engineering) from National Institute of Technology, Surathkal and is involved in the development of actuator using magneostrictive material. Presently, he is working as Assistant Professor in the Department of Mechanical Engineering, Madanapalle Institute of Technology & Science, Madanapalle. His area of research is applications of magnetostrictive materials.

Ravikiran Kadoli, National Institute of Technology, Surathkal

Dr Ravikiran Kadoli obtained his PhD from Indian Institute of Technology, Madras. Presently he is a Professor in the Department of Mechancial Engineering, NIT, Surathkal. He is actively involved in the research activities and guided one PhD and many UG and PG Projects. His areas of research are: Structural mechancis, magnetostrictive technology, computational fluid dynamics, heat transfer, thermally induced vibrations.