Method for deriving information regarding stress from a stressed ferromagnetic material
Patent
·
OSTI ID:7275355
A nondestructive evaluation technique is disclosed 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.
- DOE Contract Number:
- W-7405-ENG-82
- Assignee:
- Iowa State University Research Foundation, Inc., Ames, IA (United States)
- Patent Number(s):
- US 5012189; A
- Application Number:
- PPN: US 7-354819
- OSTI ID:
- 7275355
- Resource Relation:
- Patent File Date: 22 May 1989
- Country of Publication:
- United States
- Language:
- English
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