A critical study of the Bingham model in squeeze-flow mode

Electrorheological (ER) fluids offer the user the option of changing the performance of a damping device quickly and without much effort. Many authors agree on the validity of the Bingham model for describing the fluid. In this paper, the authors have studied this model in squeeze-flow mode. Calculations were compared with experimental results. Material data for the model were estimated from tests both in shear-flow mode and in squeeze-flow mode. The investigation shows that estimates from squeeze-flow mode give the closest fit. Cyclic loading at frequencies below 50 Hz was studied. Amplitude and frequency dependence is not well predicted by the model, so the material data are valid for one amplitude and one frequency only.