A methodology designed to monitor thermally induced loads on continuous welded rails (CWR) is presented. The technique is based on the use of sub-surface longitudinal ultrasonic waves (l.c.r. waves) and, by means of a daily data elaboration, allows to obtain the value of the neutral temperature of the rail as a function of time. From such information an estimation of longitudinal stresses, to be used as a reference, can be derived. The methodology here presented has undergone a 2 years testing period, through the instrumentation of about 3 km of railway track. All acquired data have been remotely processed in a single control station.
A practical application of ultrasonic thermal stress monitoring in continuous welded rails / D. Vangi; A. Virga. - In: EXPERIMENTAL MECHANICS. - ISSN 0014-4851. - STAMPA. - 47/5:(2007), pp. 617-623. [10.1007/s11340-006-9016-6]
A practical application of ultrasonic thermal stress monitoring in continuous welded rails
VANGI, DARIO;VIRGA, ANTONIO
2007
Abstract
A methodology designed to monitor thermally induced loads on continuous welded rails (CWR) is presented. The technique is based on the use of sub-surface longitudinal ultrasonic waves (l.c.r. waves) and, by means of a daily data elaboration, allows to obtain the value of the neutral temperature of the rail as a function of time. From such information an estimation of longitudinal stresses, to be used as a reference, can be derived. The methodology here presented has undergone a 2 years testing period, through the instrumentation of about 3 km of railway track. All acquired data have been remotely processed in a single control station.
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