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Proceedings Paper

Computation of magnetostrictive materials
Author(s): Ling Ma
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Paper 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

Paper Details

Date Published: 22 July 1993
PDF: 8 pages
Proc. SPIE 1919, Smart Structures and Materials 1993: Mathematics in Smart Structures, (22 July 1993); doi: 10.1117/12.148426
Show Author Affiliations
Ling Ma, Carnegie Mellon Univ. (United States)

Published in SPIE Proceedings Vol. 1919:
Smart Structures and Materials 1993: Mathematics in Smart Structures
H. Thomas Banks, Editor(s)

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