Accession Number:

ADA446277

Title:

An Active and Structural Strain Model for Magnetostrictive Transducers

Descriptive Note:

Research paper

Corporate Author:

IOWA STATE UNIV AMES DEPT OF AEROSPACE ENGINEERING

Report Date:

1998-01-01

Pagination or Media Count:

13.0

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.

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE