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Title: Method for deriving information regarding stress from a stressed ferromagnetic material

Abstract

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.

Inventors:
Issue Date:
OSTI Identifier:
7275355
Patent Number(s):
5012189 A
Application Number:
PPN: US 7-354819
Assignee:
Iowa State University Research Foundation, Inc., Ames, IA (United States)
DOE Contract Number:  
W-7405-ENG-82
Resource Type:
Patent
Resource Relation:
Patent File Date: 22 May 1989
Country of Publication:
United States
Language:
English
Subject:
42 ENGINEERING; FERROMAGNETIC MATERIALS; NONDESTRUCTIVE TESTING; LANGEVIN EQUATION; MAGNETIC PROPERTIES; STRESSES; EQUATIONS; MAGNETIC MATERIALS; MATERIALS; MATERIALS TESTING; PHYSICAL PROPERTIES; TESTING; 420500* - Engineering- Materials Testing

Citation Formats

Jiles, D C. Method for deriving information regarding stress from a stressed ferromagnetic material. United States: N. p., 1991. Web.
Jiles, D C. Method for deriving information regarding stress from a stressed ferromagnetic material. United States.
Jiles, D C. Tue . "Method for deriving information regarding stress from a stressed ferromagnetic material". United States.
@article{osti_7275355,
title = {Method for deriving information regarding stress from a stressed ferromagnetic material},
author = {Jiles, D C},
abstractNote = {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.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1991},
month = {4}
}