Magnetorheological and electrorheological materials in adaptive structures and their performance comparison

TLDR

MR and ER materials alter their rheology under magnetic or electric fields, respond in milliseconds, and can enhance dynamic behavior when incorporated into adaptive structures. This study compares the vibration control performance of MR‑ and ER‑based adaptive beams, assessing minimization rates, response times, and energy consumption. The authors modeled homogeneous one‑dimensional MR and ER adaptive beams, predicted vibration behavior across field levels, and fabricated and tested the beams to validate the models. Experiments confirmed that both MR and ER beams effectively reduce vibration, with comparative analyses revealing distinct performance trade‑offs and environmental sensitivities.

Abstract

Magnetorheological (MR) and electrorheological (ER) materials show variations in their rheological properties when subjected to varying magnetic and electric fields, respectively. They have quick time response, in the order of milliseconds, and thus are potentially applicable to structures and devices when a tunable system response is required. When incorporated into an adaptive structural system, they can yield higher variations in the dynamic response of the structure. This study presents a detailed analysis of vibration control capabilities of adaptive structures based on MR and ER materials, and compares their vibration minimization rates, time responses and energy consumption rates. Homogeneous one-dimensional MR and ER adaptive beam configurations were considered. A structural dynamic modeling approach was discussed and vibration characteristics of MR and ER adaptive beams were predicted for different magnetic and electric field levels. In addition to the model predictions, actual MR and ER adaptive beams were fabricated and tested. Both studies illustrated the vibration minimization capabilities of the MR and ER adaptive beams at different rates and environmental conditions. The relative performances of both MR and ER adaptive beams were discussed in detail and their advantages and disadvantages were listed.