Magnetically Induced Stress Waves in a Conducting Solid—Theory and Experiment

[+] Author and Article Information
F. C. Moon, S. Chattopadhyay

Department of Aerospace and Mechanical Sciences, Princeton University, Princeton, N. J.

J. Appl. Mech 41(3), 641-646 (Sep 01, 1974) (6 pages) doi:10.1115/1.3423363 History: Received July 01, 1973; Revised December 01, 1973; Online July 12, 2010


The induction of stress waves by transient magnetic fields has been examined analytically for a conducting half space and experimentally for a cylindrical rod. The analytical model predicts both a body force generated compressional wave and a thermoelastic stress wave. The model shows the magnetic, temperature, and stress fields in the half space for various times after a prescribed magnetic field is applied at the boundary. In the experiment a transient, radial, magnetic field (up to 15 kilogauss) was applied to the end of a copper bar. The field was generated by discharging a small capacitor bank through a flat helical coil. The measured compressional stresses obtained in this manner were of the order of the measured magnetic pressure (B2 /2μ0 ), at the end of the bar.

Copyright © 1974 by ASME
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