Shear thickening fluid damper and its application to vibration mitigation of stay cable

Lin, Kun; Zhou, Annan; Liu, Hongjun; Liu, Yi; Huang, Chen-Chao

doi:10.1016/j.istruc.2020.04.018

Cited by 29 publications

(11 citation statements)

References 43 publications

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“…A minimum free span height ratio was also proposed. Lin et al [26] designed a new type of adaptive shear thickened fluid full-scale damper (STFD) and applied it to suppress the bad vibrations of cables. According to the experimental phenomenon, a phenomenon model in line with the observed performance of the STFD was proposed, the general differential equation of the cable system in the STFD was established, and the eigenvalue problem of the STFD cable system was solved by the finite difference method.…”

Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties of Shear Square Section Steel Tube Dampers

Hui

et al. 2022

Metals

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Based on the excellent performance of shear metal dampers in building seismic capacity, the traditional shear metal damper was optimized. A double-sided shear steel tube damper with simple structure, easy replacement, and wide application is proposed. In order to study the influence of different design parameters on its seismic performance, taking the steel tube length, height, width, thickness, and connection mode as variables, five groups of 15 specimens were designed for experimental research, and the failure modes, characteristic loads and displacements, hysteretic curves, skeleton curves, stiffness degradation curves, and energy dissipation capacity of each specimen were analyzed in detail. The test results showed that the hysteretic curves of each specimen were full and that the energy dissipation capacity was good. The greater the thickness of the steel tube was, the greater the load-bearing capacity of the damper and the larger the hysteresis loop area were. The greater the width of the steel tube was, the greater the equivalent stiffness was. As displacement amplitude increased, the equivalent stiffness of the specimen showed a downward trend. The two connection modes had their own advantages and disadvantages, and a damper with reasonable connection form would need to be selected according to actual engineering needs.

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Section: Introductionmentioning

confidence: 99%

Experimental Study on Mechanical Properties of Shear Square Section Steel Tube Dampers

Hui

et al. 2022

Metals

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“…In addition, in the field of vibration control, scholars pay more attention to the thickening ratio and initial viscosity of STF [29]. This will determine the compression stroke of the damper and the comfort and practicality of seats, vehicles, and medical devices using the damper [30]. Therefore, facing the above problems, we found that it is necessary to refine the rheological properties of STF through different indicators.…”

Section: Introductionmentioning

confidence: 99%

Rheological characteristics analysis of shear thickening fluids based on response surface methodology

Zhao¹,

Zhang²,

Liu³

et al. 2022

Mater. Res. Express

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This paper analyzed the influence of various components and the external environment on the rheological properties of shear thickening fluid (STF). The single-factor experimental study was carried out with the silica particle size, the mass fraction of silica particles, the continuous phase's average molecular weight, and the temperature as the influencing factors. Obtain the influence of various factors on the initial viscosity, critical shear rate, thickening period and thickening ratio of STF samples. According to the crossover relationship between the shear stress and the intermolecular force when the shear thickening occurs, the STF's critical shear rate criterion is constructed. By introducing the mechanical balance between small molecules, the relationship between the particles' volume fraction and the distance between particles in the suspension system is established. The influencing factors and formulas of the STF's critical shear rate and shear capacity are deduced, which supports the conclusions obtained in the single-factor experiment. Based on the single-factor experiment conclusion, the mass fraction of silica particles, the average molecular weight of the continuous phase and the temperature are used as the influencing factors, and the critical shear rate, shear thickening ratio and maximum viscosity are the responses indicators. According to the Box-Behnken response surface methodology (RSM) design, 15 analysis experiments with three factors and three levels are carried out. Obtain the rheological characteristics of the STF and regression equation between each factor, based on the three-dimensional response surface graph and F-value in ANOVA result. We found that among the interaction effects, the interaction between the continuous phase's average molecular weight and the temperature has the most significant impact on the critical shear rate of the STF. The interaction between the silica particles' mass fraction and the continuous phase's average molecular weight significantly impacts the shear thickening ratio of the STF. The interaction between silica particles' mass fraction and the temperature has the most significant impact on the maximum viscosity of the STF. Finally, according to the response surface methodology experimental results and ideal STF rheological characteristics standard in engineering applications, when the mass fraction of silica particles is 35%, the average molecular weight of the continuous phase is 387, and the temperature is 20 ℃. The critical shear rate of the STF system is 5.84 1/s, the shear thickening ratio is 102.8, and the peak viscosity is 1191.7 Pa∙s, reaching the optimal theoretical value within the value scope.

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“…Zhang et al (2008a) designed a single-bar STF damper, studied its dynamic mechanical properties, and showed that such a damper can achieve dual control over stiffness and vibration damping under different frequency dynamic loading conditions. Lin and colleagues (Lin et al 2018, Wei et al 2019, Lin et al 2020 have designed a full-scale STF damper and experimentally examined its energy dissipation and dynamic properties; their damper exhibits both viscous and frictional behavior, which substantially benefits vibration control under varying loads.…”

Section: Introductionmentioning

confidence: 99%

A phenomenological theory-based viscosity model for shear thickening fluids

Lin

Liu

et al. 2021

Mater. Res. Express

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A viscosity model for shear thickening fluids (STFs) based on phenomenological theory is proposed. The model considers three characteristic regions of the typical material properties of STFs: a shear thinning region at low shear rates, followed by a sharp increase in viscosity above the critical shear rate, and subsequently a significant failure region at high shear rates. The typical S-shaped characteristic of the STF viscosity curve is represented using the logistic function, and suitable constraints are applied to satisfy the continuity of the viscosity model. Then, the Levenberg–Marquardt algorithm is introduced to fit the constitutive model parameters based on experimental data. Verification against experimental data shows that the model can predict the viscosity behavior of STF systems composed of different materials with different mass concentrations and temperatures. The proposed viscosity model provides a calculation basis for the engineering applications of STFs (e.g., in increasing impact resistance and reducing vibration).

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Shear thickening fluid damper and its application to vibration mitigation of stay cable

Cited by 29 publications

References 43 publications

Experimental Study on Mechanical Properties of Shear Square Section Steel Tube Dampers

Experimental Study on Mechanical Properties of Shear Square Section Steel Tube Dampers

Rheological characteristics analysis of shear thickening fluids based on response surface methodology

A phenomenological theory-based viscosity model for shear thickening fluids

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