Nondestructive measurement of longitudinal rail stresses: application of the acoustoelastic effect to rail stress measurement. Final report, June 1, 1975-January 31, 1977
A technique for the destructive measurement of the average longitudinal stress as a function of depth in short samples of railroad rail has been shown to be feasible. The quantitative agreement between two sets of measurements made with longitudinally oriented strain gages at two different locations on the same rail demonstrate the accuracy of the technique. Disagreement of measurements made with four arm bridges located under the rail head suggest the presence of a biaxial stresses in the rail head. Stress measurements on a 92 lb/yd rail having seen moderate usage show a maximum compressive residual stress of 200 to 250 MN/m/sup 2/ (29 to 36 ksi) at a depth of 6 to 8 mm (0.25 to 0.31 in).
- Research Organization:
- Oklahoma Univ., Norman (USA). School of Aerospace, Mechanical and Nuclear Engineering
- OSTI ID:
- 5654066
- Report Number(s):
- FRA/ORD-77/34.I
- Country of Publication:
- United States
- Language:
- English
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