Method for deriving information regarding stress from a stressed ferromagnetic material

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1991-04-30
Authors
Jiles, David
Jiles, David
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Abstract

A non-destructive evaluation technique for deriving stress in ferromagnetic materials including deriving anhysteretic and hysteresis magnetization curves for the material in both unstressed and stressed states. The anhysteretic curve is expressed as a Langevin function. The stress is expressed as an equivalent magnetic field dependent on stress and change of magnetostriction with magnetization. By measurement of these bulk magnetic properties, stress can be derived.

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Electrical and Computer Engineering
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