An Active and Structural Strain Model for Magnetostrictive Transducers

Abstract

We consider the modeling of strains generated by magnetostrictive materials in response to applied magnetic fields. The active or external component of the strain is due to the rotation of magnetic moments within the material to align with the applied field. This is characterized through consideration of the Jiles-Atherton mean field theory for ferromagnetic hysteresis in combination with a quadratic moment rotation model for magnetostriction. The second component of the strain reflects the passive or internal dynamics of the rod as it vibrates. This is modeled through force balancing which yields a wave equation with magnetostrictive inputs. The validity of a combined transducer model is illustrated through comparison with experimental data.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1998
Accession Number
ADA446277

Entities

People

  • Alison B. Flatau
  • Marcelo J. Dapino
  • Ralph C. Smith

Organizations

  • Iowa State University

Tags

DTIC Thesaurus Topics

  • Abstracts
  • Equations
  • Experimental Data
  • Information Operations
  • Magnetic Fields
  • Magnetic Moments
  • Magnetic Properties
  • Magnets
  • Materials
  • Mean Field Theory
  • North Carolina
  • Permanent Magnets
  • Rotation
  • Transducers
  • Wave Equations

Readers

  • Computational Modeling and Simulation
  • Materials Science and Engineering.
  • Structural Dynamics.