Peeling behaviour of a hard magnetic soft sheet driven by the magnetic field: Geometric nonlinearity analyses

Abstract

Magneto-responsive smart structures can produce large deformation and realize the remote non-contact control driven by the magnetic field, which are widely applied in a lot of engineering areas. In the present study, the peeling behavior of a hard-magnetic soft sheet driven by the magnetic field is comprehensively investigated both experimentally and theoretically. Firstly, the peeling experiments of two identical magnetic sheets under the control of a cylindrical magnet are performed, where one is adhered by the liquid film and the other takes a cantilever configuration. In addition, we build the expression of the total energy functional of the sheet-liquid-magnet system, and then derive the approximate solutions on the beam deflection and the adhered length during the peeling process based on the Rayleigh-Ritz method. The numerical result is in excellent agreement with the experimental data. The effects of the external magnetic field and work of adhesion on the maximum deflection and adhered length are fully explored, and more results are predicted via calculation. These findings can provide some inspirations on engineering of many new devices, such as smart structures, micro-sensors and intelligent robots, etc.