Torsional Waves for Load Monitoring of Cylindrical Waveguides

Abstract

This paper is aimed to produce a methodology to monitoring changes in the load condition in the support based on the understanding of how the mode T(0,1) interacts with simple supports under varying load conditions. An analytical expression of the phase velocity for the fundamental torsional mode T(0,1) propagating in a medium under mechanical stress is derived based on the acoustoelasticity effect. A test bench is implemented to emulate a failure or a change in the loading support conditions. A scheme pitch-catch is adopted taking advantage of an affordable way to produce torsional waves in situ based on the magnetostriction effect