Technical Reports

Nondestructive Measurement of Longitudinal Rail Stresses (Interim Report)

  • 01
  • Jul
  • 1976
AUTHOR: D.M. Egle, D.E. Bray
SUBJECT: Tracks & Structures
KEYWORDS: Rail Stress, Measurement, Rail Material Properties
ABSTRACT: A study of the effect of applied stress on the wave velocity (acoustoelasticity) of railroad rail steel has shown that a potentially useful technique exists for the nondestructive measurement of longitudinal stresses. The detection of extreme stress levels would contribute toward increased rail safety by decreasing accidents due to track buckling and weld pull aparts in continuously welded rail. Velocity variations between various new rails and between new and used rails were found to be significatnt. The overall effect of this is expected to be minimized by either establishing a base line velocity profile for rail or by comparing the velocity change of two waves, each experiencing a different change with applied stress.
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