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- W2175848145 abstract "We experimentally validate nonlinear quasi-steady electrorheological (ER) and magnetorheological (MR) damper models, using an idealized Bingham plastic shear flow mechanism, for the flow mode of damper operation. An electrorheological valve or bypass damper was designed, and fabricated using predominantly commercial off-the-shelf hydraulic components. Both the hydraulic cylinder and the bypass duct have cylindrical geometry, and damping forces are developed in the annular bypass via Poiseuille (flow mode) flow. Damper models assume parallel plate geometry. Three nondimensional groups are used for damper analysis, namely, the Bingham number, Bi, the nondimensional plug thickness, (delta) , and the area coefficient defined as the ratio of the piston head area, A<SUB>(rho</SUB> ), to the cross-sectional area of the annular bypass, A<SUB>d</SUB>. In the flow mode case, the damping coefficient, which is defined as the ratio of equivalent viscous damping of the Bingham plastic material, C<SUB>eq</SUB>, to the Newtonian viscous damping, C, is a function of the nondimensional plug thickness only. The damper was tested using a mechanical damper dynamometer for sinusoidal stroke of 2 inches, over a range of frequencies below 0.63 Hz. The damping coefficient vs. nondimensional plug thickness diagram was experimentally validated using these data over a range of damper shaft velocities and applied electric field. Because the behaviors of ER and MR fluid are qualitatively similar, these ER damper modeling results may be extended to analysis of flow mode MR dampers." @default.
- W2175848145 created "2016-06-24" @default.
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- W2175848145 date "1998-06-16" @default.
- W2175848145 modified "2023-09-23" @default.
- W2175848145 title "<title>Analysis and testing of electrorheological bypass dampers</title>" @default.
- W2175848145 doi "https://doi.org/10.1117/12.310687" @default.
- W2175848145 hasPublicationYear "1998" @default.
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