Dynamic stability of a rotating sandwich beam with magnetorheological elastomer core

• Dynamic stability of a rotating sandwich beam with MRE core is obtained using FEM.
• Considering axial load the system is modeled as a parametrically excited system.
• Beam dimension, setting angle and speed affect frequency, loss factor and stability.
• Active and passive vibration reduction of the system is shown using magnetic field.

In this work the dynamic stability of a rotating three layered symmetric sandwich beam with magnetorheological elastomer (MRE) core and conductive skins subjected to axial periodic loads has been investigated using finite element method (FEM). The derived governing equation of motion is in the form of a multi-degree of freedom Mathieu–Hill's equation with complex coefficients. The instability regions of the sandwich beam for the principal parametric resonance case have been determined by using the harmonic balance method. Effects of applied magnetic field, rotating speed, setting angle, hub radius, static load and dynamic load on the dynamic characteristics and instability regions of the sandwich beam are investigated. This work will find application in the passive and active vibration reduction of rotating sandwich structure using magnetorheological elastomer core, magnetic field and periodic axial load.