Electricity: measuring and testing – Magnetic – Railroad rail flaw testing
Reexamination Certificate
2006-05-30
2006-05-30
Patidar, Jay M. (Department: 2862)
Electricity: measuring and testing
Magnetic
Railroad rail flaw testing
C324S209000, C073S779000
Reexamination Certificate
active
07053606
ABSTRACT:
In a railway line, thermally-induced stresses are a factor for both rail breaks and rail buckling. These stresses are in the longitudinal direction. A nondestructive measuring technique enables the residual stress in a rail to be determined, and hence the thermally-induced stress. An electromagnetic probe is used to measure the stresses in the rail web in the vertical direction, and in the direction parallel to the longitudinal axis. The residual stress in the longitudinal direction can be deduced from the measured stress in the vertical direction; hence the thermally-induced stress can be determined.
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Buttle David John
Dalzell William
Thayer Peter John
AEA Technology plc
Holt William H.
Patidar Jay M.
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