# MRE Encapsulating MRG: Synergistic Improvement in Modulus Tunability and Energy Dissipation

## TL;DR

A new composite material combining magnetorheological elastomers and gels improves stiffness control and energy dissipation for advanced damping applications.

## Contribution

A novel MRE encapsulating MRG composite is introduced, offering enhanced modulus tunability and energy dissipation.

## Key findings

- Annular MRE encapsulating MRG showed a 238.47% increase in MR effect and 51.35% higher magnetic-induced modulus.
- Radial configuration achieved 168.19% MR effect improvement and 27.03% modulus enhancement.
- Both configurations exhibited significantly better energy dissipation and faster response times than traditional MREs.

## Abstract

Traditional magnetorheological elastomers (MREs) often suffer from limited modulus tunability and insufficient energy dissipation, which restrict their applications. This study prepared a novel composite material by an MR gel (MRG) embedded within the MRE, called the MRE encapsulating MRG, to synergistically enhance these properties. Annular and radial MRE encapsulating MRG configurations were fabricated using 3D-printed molds, and their dynamic mechanical performance was characterized under varying magnetic fields (0–1 T) via a rheometer. The results revealed that the composite materials demonstrated significantly improved magnetic-induced modulus and magnetorheological (MR) effects compared to conventional MREs. Specifically, the annular MRE encapsulating MRG exhibited a 238.47% increase in the MR effect and a 51.35% enhancement in the magnetic-induced modulus compared to traditional MREs. Correspondingly, the radial configuration showed respective improvements of 168.19% and 27.03%. Furthermore, both the annular and radial composites displayed superior energy dissipation capabilities, with loss factors 2.68 and 2.03 times greater than those of pure MREs, respectively. Dynamic response tests indicated that composite materials, particularly the annular MRE encapsulating MRG, achieve faster response times. These advancements highlight the composite’s potential for high-precision damping systems, vibration isolation, and adaptive control applications.