To date, several applications of magnetorheological (MR) fluids are present in the industrial world, nonetheless system requirements often needs better material properties. In technical literature a previous work shows that MR fluids exhibit a pressure dependency called squeeze strengthen effect. Since a lot of MR fluid based devices are rotary devices, this paper investigates the behaviour of MR fluids under pressure when a rotation is applied to shear the fluid. The system is designed in order to apply both the magnetic field and the pressure and follows a Design of Experiment approach. The experimental apparatus comprises a cylinder in which a piston is used both to apply the pressure and to shear the fluid. The magnetic circuit is designed to provide a nearly constant induction field in the MR fluid. The experimental apparatus measures the torque as a function of the variables considered and the yield shear stress is computed. The analysis of the results shows that there is a positive interaction between magnetic field and pressure, which enhances the MR fluid performances more than twice.
Effect of pressure on the physical properties of magnetorheological fluids / Spaggiari, Andrea; Dragoni, Eugenio. - In: FRATTURA E INTEGRITÀ STRUTTURALE. - ISSN 1971-8993. - ELETTRONICO. - 23(2013), pp. 75-86.
Data di pubblicazione: | 2013 |
Data di prima pubblicazione: | 28-dic-2012 |
Titolo: | Effect of pressure on the physical properties of magnetorheological fluids |
Autore/i: | Spaggiari, Andrea; Dragoni, Eugenio |
Autore/i UNIMORE: | |
Digital Object Identifier (DOI): | http://dx.doi.org/10.3221/IGF-ESIS.23.08 |
Rivista: | |
Volume: | 23 |
Pagina iniziale: | 75 |
Pagina finale: | 86 |
Codice identificativo Scopus: | 2-s2.0-84871703589 |
Citazione: | Effect of pressure on the physical properties of magnetorheological fluids / Spaggiari, Andrea; Dragoni, Eugenio. - In: FRATTURA E INTEGRITÀ STRUTTURALE. - ISSN 1971-8993. - ELETTRONICO. - 23(2013), pp. 75-86. |
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