Inelastic properties of magnetorheological composites: II. Model, identification of parameters

As a result of a two-part research project the inelastic properties of a selected group of magnetorheological composites in cyclic shear conditions have been identified. In the first part the fabrication of the composites, their structure, the control-measurement setup, the test methods and the experimental results were described. In the second part (presented here), the experimental data are used to construct a constitutive model and identify it. A four-parameter model of an elastic/viscoplastic body was adopted for description. The model coefficients were made dependent on magnetic field strength H . The model was analysed and procedures for its identification were designed. Two-phase identification of the model parameters was carried out. The model has been shown to be valid in a frequency range above 5 Hz.