Superimposed ultrasonic oscillations in compression tests of aluminium

Modelling the effects of superimposed ultrasonic vibrations on tension and compression tests of aluminium

“…In a previous study by the authors [16], ultrasonic oscillations were superimposed on the static load during plastic deformation in compression tests of aluminium specimens. A series of finite element models was developed to attempt an interpretation of the experimental data regarding the changes in the interfacial friction.…”

Accommodation of Plastic Deformation by Ultrasound-Induced Grain Rotation

“…The study by Daud et al [17] showed that the reduction in mean stress is greater than the amplitude of oscillatory stress provided by the ultrasonic excitation, indicating that superposition of stress is inadequate to explain the stress reduction. As for thermal softening, previous studies [5,[16][17][18][19][20][21] reported no or an insignificant specimen temperature rise during experiments, indicating that ultrasonic softening cannot merely be a thermal effect.…”

Tribological property investigation on a novel pneumatic actuator with integrated piezo actuators

“…Alternatively, a method of reducing friction force by vibrations has attracted much attention in recent years [16,17]. It was observed that vibrating of one or two surfaces in contact dramatically alters their friction coefficient.…”