46 / 2021-03-26 21:26:29

Theoretical and experimental investigation on active control of stiffness and damping characteristics of sandwich plate with MRE function core

MRE function core,Internal magnetic field,Static bearing stiffness,Dynamic stiffness,Damping ratio

The present study investigates the active control of stiffness and damping characteristics of sandwich plate with an embedded magnetorheological elastomer (MRE) function core. Firstly, based on the complex modulus approach, elastic deformation theory, and reverse identification principle of frequency response function in conjunction with the Jolly theory and Rayleigh-Ritz method employed in our previous study, a theoretical vibration model of the MRE function sandwich plates (MREFSPs) subjected to an internal magnetic field with four different types of panel materials is proposed, including fiber reinforced polymer (FRP), fiber reinforced polymer with carbon nanotubes (CNT-FRP), metal and fiber-metal hybrid (FMH) panels. The material properties of MRE function (MREF) core and the upper and lower panels are predefined, followed with the detailed derivation work of energy equations to solve the static bearing stiffness of MREFSP with three-point bending load, and dynamic stiffness and damping properties with pulse dynamic load. Some literature results are employed to coarsely validate the developed model with static and dynamic properties being considered separately. In addition, after the four MREFSP specimens with FRP, CNT-FRP, metal and FMH panels are fabricated, a series of experimental tests are undertook under different magnetic field amplitudes to provide a further verification of the model.