Effect of Torsion on Magnetostrictive Delay Lines

摘要

In this study a method is suggested for the simultaneous production of two different stress pulses in a magnetostrictive material. The magnetostrictive effect for a wire subjected exclusively to a longitudinal tension is introduced and the study extended to the case where the material is also twisted. It is shown that when the twisted wire is excited by a longitudinal magnetic field, because of the easy magnetization axis skew, it is possible to obtain not only the simultaneous production of extensional and torsional pulses, but also the production of a pulsed emf at the ends of the wire. Finally, a possible application of the phenomenon is shown to the study of second‐order elastic effects in magnetostrictive materials.