Characteristics of Angular Displacement Actuators Based on Magnetostrictive Plates under the Action of Prestressing

This publication presents the results of studies of the static characteristics of actuators for displacements (by means of an example of angular displacements) with a bending type of deformation of the active element – a magnetostrictive bilayer plate with one active layer of 49K2F alloy under the total action of prestresses caused by external forces, moments of internal forces that are induced and arise during a temperature change of a plate made of materials with different values of the temperature coefficients of linear expansion. The article shows the influence of ratios of magnitudes and signs of preliminary moments on the nature of the distribution of elastic stresses across the thickness of the active layers. Relationships have been refined to eliminate zones of an undesirable sign in the distribution of elastic stresses. The prospects of using the action of preliminary moments to achieve greater stability of characteristics with changes in the temperature of the magnetostrictive plate are shown.