Experimental dynamic analysis of composite sandwich beams with magnetorheological honeycomb core

This study deals with the manufacturing and testing of sandwich beams with carbon/epoxy composite skins and a honeycomb core filled with magnetorheological elastomer (MRE) in different proportions of magneto/elastomer (w/w%). Free and forced vibration tests conducted under several magnetic field intensities were performed to evaluate dynamic properties of the sandwich beams. The experimental results favorable reduction of mechanical vibrations, especially on the fundamental mode of the structure in question. We can see that MRE sandwich beam shifted the natural frequencies and amplitude of vibration due to the increase of an induced magnetic field.