A Magnetic NDT Method For Measuring Stress In Steel

R. Langman

doi:10.1117/12.952901

31 July 1989 A Magnetic NDT Method For Measuring Stress In Steel

R. Langman

Proceedings Volume 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis; (1989) https://doi.org/10.1117/12.952901
Event: Sira/Stress and Vibration: Recent Developments in Measurement and Analysis, 1989, London, United Kingdom

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.

Citation Download Citation

R. Langman "A Magnetic NDT Method For Measuring Stress In Steel", Proc. SPIE 1084, Stress and Vibration: Recent Developments in Industrial Measurement and Analysis, (31 July 1989); https://doi.org/10.1117/12.952901

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