Improved Ultrasonic Testing of Railroad Rail for Transverse Discontinuities in the Rail Head Using Higher Order Rayleigh (M_(21)) Waves

摘要

The first higher order mode of the Rayleigh wave was discussed by Sezawa in the early part of this century in context of seismological wave studies. These Sezawa, or M_(21), or first higher order mode Rayleigh waves, have subsequently been used in the field of nondestructive testing of layered materials based on the development of the seismological model of the Sezawa waves by others. Application of these waves in the early detection of microcracks in used rail-road rail can help prevent accidents and provide better utilization of resources in current use.