Computation of magnetostrictive materials

Ling Ma

doi:10.1117/12.148426

22 July 1993 Computation of magnetostrictive materials

Ling Ma

Proceedings Volume 1919, Smart Structures and Materials 1993: Mathematics in Smart Structures; (1993) https://doi.org/10.1117/12.148426
Event: 1993 North American Conference on Smart Structures and Materials, 1993, Albuquerque, NM, United States

Abstract

Magnetostriction is the phenomena of the deformation of ferromagnetic materials in external magnetic fields.3'14 In the early 1970's certain rare earth intermetallic compounds eg, TbDyFe2 (Terfenol), were discovered to exhibit high magnetostriction at room temperatures. Since then such materials have been of intense interest. There is however not yet a generally accepted coherent theoretical model and the principal mechanisms of magnetostriction still remain to be clarified. Recent advances in the understanding of microstructural behavior in modern materials1'2'6'8 have enabled James and Kinderlehrer to propose a phenomenological energy functional:10 E(y,m) = j{W(Vy(x),m(y(x))) — He m(y(x))} dx + J IVU(i)I2di (1) where y is the deformation of the material y:—1R3, w=y(11), m : w —4 1R3, and U is related to m by Maxwell's equation: V•(—VU+m,)=O inlEt3

Citation Download Citation

Ling Ma "Computation of magnetostrictive materials", Proc. SPIE 1919, Smart Structures and Materials 1993: Mathematics in Smart Structures, (22 July 1993); https://doi.org/10.1117/12.148426

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