Magnetorheological elastomers (MREs) exhibit instantaneous and reversible adaptability of stiffness and damping properties under the influence of magnetic field, which can be implemented in the development of controllable devices. The main MRE components are normally elastomeric matrix and magnetisable particles. Depending on the distribution of the particles in the matrix, MREs can be classified into isotropic and anisotropic. This work experimentally explored, compared, and modelled the dynamic characteristics of both isotropic and anisotropic MREs with different iron particle weight fractions (17%, 22%, and 32%). A novel shear test rig was designed with hybrid magnets system, i.e. permanent magnet and electromagnets, to fulfil the characterisation tasks. The involvement of the hybrid magnets effectively cuts down the maximum electric current and energy consumption of the rig. The tests were conducted under sinusoidal shear motions with excitation frequency ranging from...

中文翻译：

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用混合磁体剪切试验机研究各向同性和各向异性磁流变弹性体的动力学特性

磁流变弹性体（MRE）在磁场的影响下具有瞬时和可逆的刚度和阻尼特性适应性，可以在可控设备的开发中实现。MRE的主要成分通常是弹性体基质和可磁化颗粒。根据基质中颗粒的分布，MRE可以分为各向同性和各向异性。这项工作通过实验探索，比较和建模了具有不同铁颗粒重量分数（17％，22％和32％）的各向同性和各向异性MRE的动力学特性。设计了一种新型的剪切试验台，配备了混合磁体系统，即永磁体和电磁体，以完成表征任务。混合磁体的参与有效地降低了钻机的最大电流和能耗。测试是在正弦剪切运动下进行的，激发频率范围为...