High frequency dynamic mechanical study of an aluminosilicate electrorheological material

Conductive Behaviors of Polymer-Based Electrorheological Fluid under Zero and Oscillatory Mechanical Fields

“…The CELT model was originally proposed for [6] application to a system of granular metals particles (diameters around 0.01 mm) randomly dispersed in an insulating where (21) oil (19), which is similar to our ER suspension. This model predicts that T 0 Å 8a/k B N(E F )z, [7] where N(E F ) is the density of states at Fermi energy…”

Effects of Conductivity and Dielectric Behaviors on the Electrorheological Response of a Semiconductive Poly(p-phenylene) Suspension

“…The storage shear modulus (G) of the ppp-1 suspension (15 wt%) showed plateau behavior over elastic behavior (7,17). The amplitude and phase angle of field, G decreased somewhat, showing a transition to nonlinear region due to the chain breaking (17). The general shape of GЉ curves was similar, but the values were greatly enhanced in the range of electric field measured (Fig.…”

“…6 shows the G and GЉ as functions of tude and an intermediate electric field shows a linear visco-strain frequency. The storage shear modulus (G) of the ppp-1 suspension (15 wt%) showed plateau behavior over elastic behavior (7,17). The amplitude and phase angle of field, G decreased somewhat, showing a transition to nonlinear region due to the chain breaking (17).…”

“…When the conductivity of particle is increased, the dynamic yield stress is also enhanced compared with the value of the undoped one. However, when the particle conductivity is increased further, as in the case of ppp-4 and 5, yield stresses dynamic yield stresses of the ppp-2 suspension (15 wt%) the stress are dependent upon the applied electric field strength (17,18). The response becomes, however, nonlindid not diminish but increased somewhat with temperature in the range of an electric field strength of E Å 0.5-3.0 kV/ ear with increasing strain amplitude due to the break of chain structure induced by the electric field.…”

<title>Nonlinear modeling and performance prediction of electrorheological fluid dampers</title>

“…Gamota, et al [11] proposed a model based on the Fourier analysis of ER fluid stress response for different cases. The experimental studies upon which this model was based provided valuable insight into the dynamic behavior of these materials [12,13]. We proposed a nonlinear viscoelastic-plastic model which described the pre-yield and the post-yield characteristics of an ER fluid using a nonlinear network of linear viscoelastic and viscous elements [14,15].…”