Hysteresis phenomena of ultrasonic velocity change in magnetorheological fluids

Issue title: Selected Papers from the 14th International Symposium on Applied Electromagnetics and Mechanics (ISEM 2009), Part II

Article type: Research Article

Authors: Bramantya, Muhammad Agung^a | Takuma, Hiroki^a | Sawada, Tatsuo^{a; *}

Affiliations: [a] Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama, Japan

Correspondence: [*] Corresponding author: Tatsuo Sawada, Department of Mechanical Engineering, Keio University, 3-14-1 Hiyoshi, Kohoku-ku, Yokohama 223-8522, Japan. Tel.: +81 45 566 1504; Fax: +81 45 566 1495; E-mail: [email protected]

Abstract: The magnetorheological response of magnetorheological fluids (MRF) results from the polarization induced in the suspended particles by application of an external magnetic field. We proposed a qualitative analysis of these effects by measuring properties of ultrasonic propagation. Hysteresis was appeared when magnetic field increased to and decreased from the certain value, 290 mT in our experiment. The change rate of the ultrasonic wave propagation velocity increased during the increasing process of the external magnetic field. However, it was kept almost the same value during the decreasing process.

Keywords: Magnetorheological fluids, ultrasonic velocity, hysteresis, magnetic field

DOI: 10.3233/JAE-2010-1262

Journal: International Journal of Applied Electromagnetics and Mechanics, vol. 33, no. 3-4, pp. 1365-1372, 2010