Adaptive Vibration Isolation in Electric Vehicles Using Magnetorheological Elastomers

The applications of magnetorheological elastomers (MREs) as adaptable materials for effective vibration isolation systems in electric vehicles (EVs) are investigated in this chapter. Considered smart materials, MREs can change their mechanical characteristics, including stiffness and damping under magnetic fields. By solving problems such as sedimentation and leakage, MREs—which consist of micron-sized ferromagnetic particles buried in a viscoelastic silicone matrix—offer notable advantages over traditional magnetorheological fluids (MRFs). These qualities make MREs suitable for long-term, continuous use in automotive applications—especially those related to electric cars. This work uses the blocked transfer stiffness approach to evaluate the dynamic performance of MREs under torsional vibrations using a single-degree-of-freedom isolation system. One end of the MRE sample is fixed in this process, while the other is under controlled harmonic angular displacements. This arrangement essentially shows the operational conditions in electric car applications by allowing accurate evaluations of field-dependent stiffness and damping properties throughout various magnetic fields and frequencies. With the advantages greatest felt at higher frequencies, the results show a clear association between increased magnetic field strength and enhanced stiffness and damping. Real-time tuning improves ride comfort and reduces noise, therefore MREs’ adaptability could make them ideal for vibration isolation systems in electric vehicles. Emphasizing MREs as robust and useful materials for enhancing next-generation adaptive vibration isolation systems in electric vehicles, this chapter describes how they offer stability, durability, and operating efficiency advantages over conventional materials.