A Homogenized Energy Model for the Direct Magnetomechanical Effect

Abstract

This paper focuses on the development of a homogenized energy model which quantifies certain facets of the direct magnetomechanical effect. In the first step of the development, Gibbs energy analysis at the lattice level is combined with Boltzmann principles to quantify the local average magnetization as a function of input fields and stresses. A macroscopic magnetization model, which incorporates the effects of polycrystallinity, material nonhomogeneities, stress-dependent interaction fields, and stress-dependent coercive behavior, is constructed through stochastic homogenization techniques based on the tenet that local coercive and interaction fields are manifestations of underlying distributions rather than constants. The resulting framework incorporates previous ferromagnetic hysteresis theory as a special case in the absence of applied stresses. Attributes of the framework are illustrated through comparison with previously published steel and iron data.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2005
Accession Number
ADA439432

Entities

People

  • Marcelo J. Dapino
  • Ralph C. Smith

Organizations

  • North Carolina State University

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Actuators
  • Asymmetry
  • Differential Equations
  • Domain Walls
  • Eddy Currents
  • Equations
  • Ferromagnetic Materials
  • Inverse Magnetoelastic Effects
  • Magnetic Phenomena
  • Magnetic Properties
  • Magnetoelasic Effects
  • Materials
  • Mean Field Theory
  • Orientation (Direction)
  • Permeability
  • Physical Properties
  • Tensile Stress

Readers

  • Computational Fluid Dynamics (CFD)
  • Materials Science and Engineering.
  • Military History / Militaries and War Studies