Abstract

In this study, the free vibration analysis of carbon nanotubes reinforced magnetorheological elastomer (CNT-MRE) sandwich beam has been presented. The sandwich specimens are made of thin elastic strips integrated with CNT-MRE core. The viscoelastic properties of MRE and CNT-MRE are identified using ASTM E756-05 standard test. The natural frequencies and damping factors of with and without CNT reinforced MRE sandwich beams have been measured experimentally at various magnetic fields under cantilever condition. The measured natural frequencies are validated through the 3D finite element model. Further, the variations of natural frequencies with the influence of different levels of magnetic fields, boundary conditions, and core-skin thickness ratios of the CNT-MRE sandwich beam are studied. The analysis results demonstrate that the presence of carbon nanotubes improves the vibration behavior of MR elastomer.

摘要

在这项研究中，介绍了碳纳米管增强磁流变弹性体 (CNT-MRE) 夹层梁的自由振动分析。夹层样品由与 CNT-MRE 芯集成的薄弹性条制成。MRE 和 CNT-MRE 的粘弹性特性使用 ASTM E756-05 标准测试来确定。已经在悬臂条件下在各种磁场下通过实验测量了有无 CNT 增强 MRE 夹层梁的固有频率和阻尼因子。测量的固有频率通过 3D 有限元模型进行验证。此外，研究了CNT-MRE夹层梁在不同磁场水平、边界条件和芯皮厚度比的影响下固有频率的变化。