Study on the performance of shear thickening fluid and its application as a damper
ZHOU Hong, GUO Chao-yang, ZONG Lu-hang, XUAN Shou-hu, GONG Xing-long
CAS Key Laboratory of Mechanical Behavior and Design of Materials, Department of Modern Mechanics, University of Science & Technology of China, Hefei 230027, China
Abstract:A shear thickening fluid (STF) composed of polystyrene-ethyl acrylate (P(ST-EA)) nanoparticles suspended in glycol was prepared and the dynamic properties of its application as a damper were investigated. The rheological properties of STF have been measured under steady and oscillatory shear tests by a rheometer. Experimental results show that the viscosity curves of STF can be divided into three regions: slight shear thinning with low shear rate; significant shear thickening at critical shear rate; shear thinning again with higher shear rate. Dynamic tests of the STF-filled damper were conducted by using a material test system (MTS) with varied excitation frequency and amplitude. When the damper is subjected to external applied excitation at critical shear rate, output force abruptly increased due to a steep rise in viscosity of STF, as well as storage modulus and loss modulus. It indicates that STF has tremendous ability of energy absorption and dissipation. A linear model with effective stiffness and effective viscous damping was developed in order to evaluate elastic and damping characteristic of the STF-filled damper.
周 鸿;郭朝阳;宗路航;宣守虎;龚兴龙 . 剪切增稠液及阻尼器性能研究[J]. , 2013, 32(18): 15-20.
ZHOU Hong;GUO Chao-yang;ZONG Lu-hang;XUAN Shou-hu;GONG Xing-long. Study on the performance of shear thickening fluid and its application as a damper. , 2013, 32(18): 15-20.