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Proceedings Paper

A Magnetic NDT Method For Measuring Stress In Steel
Author(s): R. Langman
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Paper Abstract

This paper takes as its starting point the Bvs H (hysteresis) characteristics of steel in different directions relative to the applied stress. It predicts, and shows by means of tests, that there is a difference in directions between flux density B and the field strength H because stress makes steel anisotropic. This difference in direction (called the "rotation of magnetisation)" is the basis of a non-destructive method of estimating stress. An important point, that is emphasised now, is that the difference of principal stresses is measured, and not necessarily the absolute values of stresses.

Paper Details

Date Published: 31 July 1989
PDF: 7 pages
Proc. SPIE 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis, (31 July 1989); doi: 10.1117/12.952901
Show Author Affiliations
R. Langman, University of Tasmania (Australia)


Published in SPIE Proceedings Vol. 1084:
Stress and Vibration: Recent Developments in Industrial Measurement and Analysis

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