An experimental study on dynamic behaviour of a sandwich beam with 3D printed hexagonal honeycomb core filled with magnetorheological elastomer (MRE)

Abstract

Sandwich beams with an aluminium face sheet and a magnetorheological elastomer (MRE) of varying proportions of elastomer and magnetic particles (weight to weight) % filled in a honeycomb core of Nylon and Resin8000 are manufactured and experimentally analysed in this study. To evaluate the dynamic properties of sandwich beams, manufactured structures subjected to sine sweep and classic shock tests and assessed both with and without magnetic field of varying intensities applied on the free end of the beam. The experimental results demonstrated good performance in vibration level attenuation, particularly in the structure's primary vibration mode under consideration. The magnetic field applied was capable of lowering the first natural frequency of the proposed sandwich beam structures. Experiment results showed that an increase in an induced magnetic field shifted the natural frequencies, vibration amplitude, and damping ratio of sandwich panels with MRE honeycomb core.

Damping and Stiffness Analysis of Sandwich Beam with 3D-Printed Honeycomb Core Filled with Magnetorheological Elastomer (MRE): An Experimental Approach

“…Furthermore, scholarly research has been conducted on the subject of material empirical modeling, as evidenced by studies [ 29 , 30 , 31 , 32 , 33 ], Additionally, investigations have been carried out on material development and property testing [ 34 , 35 , 36 ], innovative device design and characterization [ 37 , 38 ], performance evaluation [ 39 , 40 , 41 , 42 ], and sandwich beams [ 43 , 44 ]. Several studies have also investigated the dynamic analysis of sandwich constructions made with magnetorheological gel (MRG) MREs [ 45 , 46 , 47 , 48 ]. The sandwich construction exhibits a notable ratio of stiffness to weight, which enables the effective integration and optimization of diverse materials for both the surface and core layers.…”