전극재질 및 간극에 따른 ER 유체의 특성실험

이호근; 최승복; 정재천; 강윤수; 서문석

Korean Journal of Rheology, Vol.10, No.3, 165-172, September, 1998

Characteristics of ER Fluids with Different Electrode Gaps and Materials

This paper presents experimental results on Bingham characteristics of ER fluids with respect to two principal influence factors ; electrode gaps and electrode materials. An experimental apparatus which is adaptable to change the gaps and materials is established inhouse. The electrode gaps are adapted by 0.75 mm, 1.00 mm and 1.25 mm, while the stainless steel, brass and carbon steel are used for the electrode materials. As for the ER fluids, a water-based arabic gum ER fluid (ERF-1) and a dry-based Bayer ER fluid (ERF-2) are employed to be tested. The shear stresses and hence field-dependent yield shear stresses are obtained under operating temperatures of 25℃, 70℃ and 100℃ at various electric fields ranging from 0 to 4 kV/mm. In addition, response times of the ER fluids to the electric field are experimentally investigated at voltage on and off states.

Keywords:ER fluid;Bingham property;Electrode gap;electrode material;Response time

[References]

Winslow WH, J. Appl. Phys., 20, 1137 (1949)
Brooks DA, Proc. XIth int. Conf. on Rheology (1992)
Johnson AR, Bullough WA, Firoozian R, Hosseini-Sianaki A, Makin J, Xiao S, Proc. of the Int. Conf. on ER-Fluids, 424 ~ 441 (1991)
Choi SB, Cheong CC, Kim GW, Mechatronics, 7(1), 53 (1997)
Choi SH, Choi YT, Choi SB, Cheong CC, Int. J. Mod. Phys. B, 10(23), 3143 (1996)
Nakano M, Aizawa R, Asako Y, Proc. of the 5th Int. Conf. on ER-Fluids, 132 ~ 139 (1995)
Sproston JL, El-Washed AK, Williams EW, Stanway R, Proc. of the 5th Int. Conf. on ER-Fluids, 259 ~ 269 (1995)
Williams EW, Rigby SG, Sproston JL, Stanway R, J. Non-Newton. Fluid Mech., 47, 221 (1993)
Jordan TC, Shaw MT, IEEE Trans. Electrical Insulation, 24(5), 849 (1989)
Block H, Kelly JP, J. Phys. D: Appl. Phys., 21, 1661 (1988)
DIN 53 019

[1] Winslow WH, J. Appl. Phys., 20, 1137 (1949)

[2] Brooks DA, Proc. XIth int. Conf. on Rheology (1992)

[3] Johnson AR, Bullough WA, Firoozian R, Hosseini-Sianaki A, Makin J, Xiao S, Proc. of the Int. Conf. on ER-Fluids, 424 ~ 441 (1991)

[4] Choi SB, Cheong CC, Kim GW, Mechatronics, 7(1), 53 (1997)

[5] Choi SH, Choi YT, Choi SB, Cheong CC, Int. J. Mod. Phys. B, 10(23), 3143 (1996)

[6] Nakano M, Aizawa R, Asako Y, Proc. of the 5th Int. Conf. on ER-Fluids, 132 ~ 139 (1995)

[7] Sproston JL, El-Washed AK, Williams EW, Stanway R, Proc. of the 5th Int. Conf. on ER-Fluids, 259 ~ 269 (1995)

[8] Williams EW, Rigby SG, Sproston JL, Stanway R, J. Non-Newton. Fluid Mech., 47, 221 (1993)

[9] Jordan TC, Shaw MT, IEEE Trans. Electrical Insulation, 24(5), 849 (1989)

[10] Block H, Kelly JP, J. Phys. D: Appl. Phys., 21, 1661 (1988)

[11] DIN 53 019