Development of a linear damper working with magnetorheological shear thickening fluids
Development of a linear damper working with magnetorheological shear thickening fluids
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DOI：
10.1177/1045389x15577653
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发表时间：
2015-03
影响因子：
2.7
通讯作者：
Jian Yang;Shuaishuai Sun;Weihua Li;H. Du;G. Alici;M. Nakano
中科院分区：
文献类型：
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作者：
Jian Yang;Shuaishuai Sun;Weihua Li;H. Du;G. Alici;M. Nakano
磁流变剪切增稠液是一种兼具磁流变和剪切增稠效应的智能材料。本文研究了一种新型的磁流变剪切增稠流体线性阻尼器的设计与开发。首先，将重量分数分别为20%和80%的微米级羰基铁颗粒浸入剪切增稠液基中，在高剪切条件下充分混合，得到磁流变剪切增稠液。然后，设计并制作了带旁路的单管阻尼器。MTS试验结果表明，加入剪切增稠液的影响使20%磁流变剪切增稠液填充阻尼器在不同的动加载速度下工作，且刚度和阻尼发生变化，同时阻尼器的动力学特性依赖于磁场的变化。20%磁流变剪切增稠充液阻尼器的实测响应证明了该阻尼器既有磁流变效应，又有剪切增稠效应。80%磁流变剪切增稠充液阻尼器的剪切增稠效应受到抑制，且随着铁体积的增大，MR效应更加明显，与传统的磁流变充液阻尼器表现更接近。
Magnetorheological shear thickening fluid is a smart material that exhibits both magnetorheological and shear thickening effects. This study focuses on the design and development of a novel magnetorheological shear thickening fluid–based linear damper. First, micron-sized carbonyl iron particles, at a 20% and 80% weight fraction, were immersed among the shear thickening fluid base and thoroughly mixed under a high shear condition to produce the magnetorheological shear thickening fluid. Then, a monotube damper with a bypass was designed and fabricated. The testing results using an MTS machine show that the influence of incorporating shear thickening fluid allows the 20% magnetorheological shear thickening fluid–filled damper to work in different dynamic loading velocities with the stiffness and damping changed, while, simultaneously, the dynamics of the damper depend on the variations in the magnetic field. The measured responses of the 20% magnetorheological shear thickening fluid–filled damper prove that the dampers have both the MR effect and shear thickening effect. In contrast, the 80% magnetorheological shear thickening fluid–filled damper behaves more like a conventional magnetorheological fluid–filled damper because its shear thickening effect is restrained and the MR effect becomes more obvious with higher iron volume.