Electromagnetic Measurement of Applied and Residual Surface Strain in Steel
Publication: Publication Date: 1 November 2015Testing Method:
Complex-reluctance bridges are electromagnetic devices that are shown to be able to detect both the angle of strain in steel and changes in the magnitude of applied strain with some sensitivity. Evidence is presented that they can also detect the magnitude of residual strain. Further research is suggested in this area. The residual strain detection technique is simple to use and easy to understand. Two new terms are introduced for complex-reluctance circuits: impermance, to parallel the impedance in alternating current electrical circuits; and reductance, to parallel reactance in alternating current electrical circuits.
- Canada, C.E., and O.H. Zinke, “Transient Determinations of Thermal Diffusivities and Emissivities of Metal Foils,” Journal of Applied Physics, Vol. 49, 1978, pp. 289–296.
- Jacovelli, P.B., and O.H. Zinke, “Evidence of an Anomalous Thomson Effect,” Thermoelectricity in Metal Conductors, edited by F.J. Blatt and P.A. Schroeder, Plenum Press, New York, New York, 1978.
- Jiles, D., Introduction to Magnetism and Magnetic Materials, Chapman and Hall, London, United Kingdom, 1991, pp. 171–172.
- Zinke, O.H., and W.F. Schmidt, “Linear AC Magnetic Circuit Theory,” IEEE Transactions on Magnetics, Vol. 29, No. 5, 1993, pp. 2207–2212.
- Zinke, O.H., W.F. Schmidt, and J.T. Lovett, “Thickness, Alloy Content and Cracks in Aluminum Measured by an Alternating Current Magnetic Bridge,” Materials Evaluation, Vol. 59, No. 4, 2001, pp. 537–542.
55 Page Views
0 PDF Downloads
0 Facebook Shares