MAGNETOSTRICTIVE GENERATION AND DETECTION OF LONGITUDINAL, TORSIONAL,AND FLEXURAL WAVES IN A STEEL ROD

Experimental data are presented that show the feasibility of producing and detecting longitudinal, torsional, and flexural wave modes in a s teel rod using sensors based on the Joule nod Villari magnetostrictive effects. By changing the sensor configuration nod the distribution of the biasing magnetic field applied to the rod, single, or multiple wa ve modes can be simultaneously generated and detected. The magnetostri ctive sensors provide a very simple means of experimentally investigat ing the properties of wave propagation in a frequency range up to a fe w 100 kHz.