Modelling of ER squeeze films at low amplitude oscillations

Esmonde, H.; See, Howard; Swain, Michael V.

doi:10.1016/j.jnnfm.2009.05.002

Cited by 6 publications

(1 citation statement)

References 21 publications

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“…Nilsson and Ohlson [18] described experiments termed 'squeeze mode operation' that were performed in a unit containing circular plates placed in parallel, with an ER fluid located between the plates. Esmonde et al [19] presented an experimental investigation of ER squeeze film dynamics for a constant applied voltage and low strain amplitude. Pu et al [20] proposed a type of multiple plate electrode GER fluid damper that operates in the squeeze mode.…”

Section: Introductionmentioning

confidence: 99%

Numerical and experimental study of a novel GER fluid damper based on helical duct flow

Zhao¹,

Cao²,

Jing³

et al. 2022

Smart Mater. Struct.

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The beneﬁts of giant electrorheological ﬂuids (GER ﬂuids) have been harnessed to enhance their eﬀect in damping force generation. However, few results have been reported on the issue of taking advantage of a helical duct ﬂow in improving the performance of a GER-based damper in generating and tuning damping eﬀects. In this study, an innovative GER ﬂuid-based damper with helical ﬂow ducts is proposed. The proposed ﬂow mode can achieve a greater pressure gradient during operation, and, thus, improve the damping performance by enlargement of the length of the active region with more compact dimensions. A mathematical model aiming to explain the mechanical properties of the damper is investigated based on the continuity equation and Navier–Stokes equations. Then, simulation studies based on computational ﬂuid dynamics (CFD) solvers are conducted to verify the eﬀectiveness of the mathematical model. Additionally, an experimental prototype of the GER ﬂuid damper is fabricated, and damping force measurements under diﬀerent excitations are carried out. The experimental results agree well with the results obtained from theoretical analysis and CFD solvers. The regulation coeﬃcient that illustrates the tunable range of the damping force is found to reach a value of 8 times under an electric ﬁeld ranging from 0 to 1 kV/mm.

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Section: Introductionmentioning

confidence: 99%