Method for deriving information regarding stress from a stressed ferromagnetic material

Patent · Tue Apr 30 00:00:00 EDT 1991

OSTI ID:867798

Jiles, David C ^[1]

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1. Ames, IA

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.

• Research Organization: Ames Laboratory (AMES), Ames, IA; Iowa State Univ., Ames, IA (United States)
• DOE Contract Number: W-7405-ENG-82
• Assignee: Iowa State University Research Foundation, Inc. (Ames, IA)
• Patent Number(s): US 5012189
• Application Number: 07/354,819
• OSTI ID: 867798
• Country of Publication: United States
• Language: English

Related Subjects

method
deriving
information
regarding
stress
stressed
ferromagnetic
material
non-destructive
evaluation
technique
materials
including
anhysteretic
hysteresis
magnetization
curves
unstressed
curve
expressed
langevin
function
equivalent
magnetic
field
dependent
change
magnetostriction
measurement
bulk
properties
derived
magnetic materials
magnetic field
materials including
magnetic material
magnetic properties
non-destructive evaluation
ferromagnetic material
information regarding
deriving information
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