Electric Field Leakage Nondestructive Testing Principle and its Simulation
Publication: Publication Date: 1 November 2015Testing Method:
A new electric field leakage (EFL) testing principle is presented. The aim of this paper is to theoretically demonstrate its potential for inspection of external and internal discontinuities in conducting materials (particularly for nonferrous metals) by injecting a direct current into the tested object and measuring the electric field leaking from the discontinuity. Firstly, the principle of EFL testing is illustrated based on the boundary conditions of electric field. Then, the electric field characteristics outside a direct-current-carrying conductor are described. Last, simulations are carried out to further discuss the possibility of the EFL testing principle.
- Assis, A.K.T., J.A. Hernandes, and J.E. Lamesa, ‘‘Surface Charges in Conductor Plates Carrying Constant Currents,’’ Foundations of Physics, Vol. 31, No. 10, 2001, pp. 1501–1511.
- Assis, A.K.T., W.A. Rodrigues, Jr., and A.J. Mania, ‘‘The Electric Field Outside a Stationary Resistive Wire Carrying a Constant Current,’’ Foundations of Physics, Vol. 29, No. 5, 1999, pp. 729–753.
- Cartz, L., Nondestructive Testing, ASM International Press, New York, New York, 1995.
- Guru, B.S., and H. R. Hiziroglu, Electromagnetic Field Theory Fundamentals, second edition, Cambridge University Press, New York, New York, 2004.
- Hedengren, K.H., J.D. Young, and R.O. McCary, “Use of Imaging Techniques for Eddy Current NDE,” Review of Progress in Quantitative Nondestructive Evaluation, Vol. 7A, 1988, pp. 357–365.
- Hinsley, J.F., Non-destructive Testing, Macdonald & Evans, Ltd., London, England, 1959.
- Jefimenko, O., “Demonstration of the Electric Fields of Current-carrying Conductors,” American Journal of Physics, Vol. 30, No. 1, 1962, pp. 19–21.
- Kang, Y.H., J. Tu, J.B. Wu, and Y.H. Sun, “The High-speed Ultrasonic Testing Method for Steel Pipes Based on Linear Reciprocating Probes,” Advanced Materials Research, Vol. 301, No. 303, 2011, pp. 919–923.
- Knight, M.J., F.P. Brennan, and W.D. Dover, “Effect of Residual Stress on ACFM Crack Measurements in Drill Collar Threaded Connections,” NDT&E International, Vol. 37, No. 5, 2004, pp. 337–343.
- Lee, J.H., M. Saka, and H. Abé, “Loading Effect on ACPD of a Crack in Ferromagnetic Material,” Experimental Mechanics, Vol. 37, No. 2, 1997, pp. 132–136.
- McNab, A., and J. Thomson, “Measurement Technique for Eddy-current Arrays,” IEEE Proceedings A: Physical Science, Measurement, and Instrumentation, Vol. 137, No. 3, 1990, pp. 147–154.
- Sun, Y., and Y. Kang, “Magnetic Compression Effect in Present MFL Testing Sensor,” Sensors and Actuators A: Physical, Vol. 160, Nos. 1–2, 2010a, pp. 54–59.
- Sun, Y., and Y. Kang, “Magnetic Mechanisms of Magnetic Flux Leakage Nondestructive Testing,” Applied Physics Letters, Vol. 103, 2013.
- Sun, Y., and Y. Kang, “A New MFL Principle and Method Based on Near-zero Background Magnetic Field,” NDT&E International, Vol. 43, No. 4, 2010b, pp. 348–353.
- Yin, X., and D.A. Hutchins, “Non-destructive Evaluation of Composite Materials using a Capacitive Imaging Technique,” Composites Part B: Engineering, Vol. 43, No. 3, 2012, pp. 1282–1292.
- Yin, X., D.A. Hutchins, and G. Chen, “Detecting Surface Features on Conducting Specimens through an Insulation Layer using a Capacitive Imaging Technique,” NDT&E International, Vol. 52, November 2012, pp. 157–166.
- Yu, J., J.C. Barker, and R. Brook, “Optimization of Crack Length Measurement by DCPD in DCB Specimens,” Proceedings of the Third International Offshore and Polar Engineering Conference, Singapore, 6–11 June 1993.
180 Page Views
0 PDF Downloads
0 Facebook Shares