Experimental investigation on hysteretic behavior of a shear thickening fluid damper

Abstract

Summary In this study, a shear thickening fluid (STF) damper was experimented upon under different loading frequencies and amplitudes to investigate its nonlinear hysteretic behavior and energy dissipation capacity. An STF sample with 20% mass fraction and dispersion medium were prepared by nanoparticle silica (SiO2) and polyethylene glycol (PEG200). By using a parallel‐plate rheometer, steady‐state experiments were carried out to characterize the rheological properties of the sample. The results indicate that the STF sample shows an abrupt increase in viscosity/stress beyond a critical shear rate/strain. The results also show that the STF sample has good reversibility, thixotropy, and stability and can be used as a smart damping material in damper devices. Also, a prototype damper was developed and manufactured. Its nonlinear hysteretic behavior and energy dissipation capacity were experimentally investigated through the responses of damping force–displacement and damping force–velocity. The results show that the STF damper has excellent damping force as the loading condition increases and the controllability can be increased up to 3.21 times. The results also show that the energy dissipation capacity formed by damping force–displacement becomes fuller as the loading condition increases. Moreover, the results show that the graphical shapes of hysteretic loops of damping force–velocity can exhibit various styles as the STF's mechanism changes but the shapes are not stable when the velocity exceeds a certain value.

Hybrid Polymer Composites Used in the Arms Industry: A Review

“…Reducing fabric layers improved the energy dissipation mechanism and reduced weight and thickness. The addition of STG stabilized the protective coating of the STF, which increased the friction between fibers and their strength [ 37 ].…”

Optimal design of tuned inerter dampers with series or parallel stiffness connection for cable vibration control

“…Passive dampers are widely adopted in practical applications because of their practicability, reliability, and cost‐effectiveness. Common passive control devices include viscous fluid dampers, viscoelastic dampers, friction dampers, metallic yield dampers, tuned mass dampers, and shear thickening fluid dampers 2–4 . Systematic studies indicate that the optimal performance of a passive damper installed on a stay cable is capped by the installation location of the damper 5–12 .…”

Preparation and characterization of imidazolyl ionic liquid‐based shear thickening dispersion system

“…As a new type of green organic solvent, ionic liquid has many advantages, such as ultra-low vapor pressure, nonvolatile, nontoxic, nonflammable and explosive, recyclable, high thermal stability, and chemical stability. 34,35 Due to the single type and function of shear thickening liquid, the ionic liquid can be considered as the good dispersion medium for shear thickening system. [36][37][38][39] In this paper, ionic liquid 1-butyl-3-methylimidazole hexa-fluorophosphate ([BMIM]PF 6 ) is synthesized, and used to form novel ionic shear thickening combined with poly methyl methacrylate (PMMA).…”

“…Although these dispersive media have good physical and chemical stability and environmental friendliness, the resulted STF owns only single function. As a new type of green organic solvent, ionic liquid has many advantages, such as ultra‐low vapor pressure, nonvolatile, nontoxic, nonflammable and explosive, recyclable, high thermal stability, and chemical stability 34,35 . Due to the single type and function of shear thickening liquid, the ionic liquid can be considered as the good dispersion medium for shear thickening system 36–39 .…”