In the present study the dynamic behavior of a commercial silicon based magnetorheological elastomer was investigated. This material presents a non-newtonian characteristics whose response depends on the rate at which it is stressed. The damping properties under dynamic load of these materials have been studied in technical literature, while the influence of the magnetic field on the dynamic shear modulus is unknown. Hence, the aim of this paper is to test the change in dynamic shear modulus under a sinusoidal strain with amplitude of 2 and 4 mm, cyclic frequency of 4 , 8 and 12 Hz and magnetic flux density of 0 and 0.2 T. The approach adopted in this work was based on a design of experiment technique in order to evaluate the influence of the three variables involved and their interactions. The results highlights a strong dependence of the dynamic shear modulus on the strain rate while the influence of the magnetic field is weak, especially at the higher frequencies.
Experimental dynamic characterization of magnetorheological Silly Putty / Golinelli, Nicola; Spaggiari, Andrea. - ELETTRONICO. - 1:(2014), pp. 36-39. (Intervento presentato al convegno YSESM - XIII th Youth Symposium on Experimental Solid Mechanics tenutosi a Zameckas ypka, Decın, Czech Republic nel June, 29th - July, 2nd 2014).
Experimental dynamic characterization of magnetorheological Silly Putty
GOLINELLI, NICOLA;SPAGGIARI, Andrea
2014
Abstract
In the present study the dynamic behavior of a commercial silicon based magnetorheological elastomer was investigated. This material presents a non-newtonian characteristics whose response depends on the rate at which it is stressed. The damping properties under dynamic load of these materials have been studied in technical literature, while the influence of the magnetic field on the dynamic shear modulus is unknown. Hence, the aim of this paper is to test the change in dynamic shear modulus under a sinusoidal strain with amplitude of 2 and 4 mm, cyclic frequency of 4 , 8 and 12 Hz and magnetic flux density of 0 and 0.2 T. The approach adopted in this work was based on a design of experiment technique in order to evaluate the influence of the three variables involved and their interactions. The results highlights a strong dependence of the dynamic shear modulus on the strain rate while the influence of the magnetic field is weak, especially at the higher frequencies.
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