This article proposes a simple physical-based model to describe and predict the performance of axially compressed magnetorheological elastomer cylinders used as vibration and shock absorbers. The model describes the magnetorheological elastomer macroscopic stiffness changes because of an externally applied magnetic field from a microscopic composite cell of silicone rubber and carbonyl iron particle. Despite neglecting the material hyperelasticity, anisotropy and adjacent magnetic interaction, the model describes effectively the effect of the magnetic field on the macroscopic modulus of elasticity. The changes in the mechanical properties with the induced magnetic field are measured on samples of different particle concentration based on volume percentage, that is, 10 and 30 percent concentration of iron particles in a silicone rubber matrix. The manufacturing process of the samples is detailed, as well as the experimental validation of the effective stiffness change under a magnetic field in terms of transmissibility and mobility testing. However, the prediction seems to be limited by the linear elastic material model. Predictions and measurements are compared, showing that the model is capable of predicting the tunability of the dynamic/shock absorber and that the proposed devices have a possible application in the reduction of mechanical vibrations.

本文提出了一个简单的基于物理的模型来描述和预测用作振动和减震器的轴向压缩磁流变弹性体圆柱体的性能。该模型描述了磁流变弹性体宏观刚度的变化，这是由于来自硅橡胶和羰基铁颗粒的微观复合单元的外部施加的磁场。尽管忽略了材料超弹性、各向异性和相邻磁相互作用，该模型有效地描述了磁场对宏观弹性模量的影响。机械性能随感应磁场的变化是在基于体积百分比的不同颗粒浓度的样品上测量的，即硅橡胶基质中铁颗粒浓度为 10% 和 30%。详细介绍了样品的制造过程，以及在传递性和移动性测试方面对磁场下有效刚度变化的实验验证。然而，预测似乎受到线弹性材料模型的限制。对预测和测量进行了比较，表明该模型能够预测动态/减震器的可调性，并且所提出的设备在减少机械振动方面有可能的应用。