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2000: RESONANCE RESPONSE OF ELECTRORHEOLOGICAL FLUIDS IN VERTICAL O SCILLATION SQUEEZE FLOW, Acta Physica Sinica, 12(9): 944-948. doi: 10.3321/j.issn:1000-3290.2000.09.011
Citation: 2000: RESONANCE RESPONSE OF ELECTRORHEOLOGICAL FLUIDS IN VERTICAL O SCILLATION SQUEEZE FLOW, Acta Physica Sinica, 12(9): 944-948. doi: 10.3321/j.issn:1000-3290.2000.09.011
shu

  • Department of Physics, Fudan University, Shanghai 200433, ChinabDepartment of Physics, Qiqihar University; Heilongjiang 161006, China

  • Department of Physics, Fudan University, Shanghai 200433, Chinab

RESONANCE RESPONSE OF ELECTRORHEOLOGICAL FLUIDS IN VERTICAL O SCILLATION SQUEEZE FLOW

  • 摘要: The resonance effect of microcrystalline cellulose/castor oil electrorheological (ER) suspensions was studied in a compressed oscillatory squeeze flow under external electric fields. The resonance frequency first increases linearly with increasing external field, and then shift to high-field plateau. The amplitudes of resonance peak increase sharply with the applied fields in the range of 0.17-1.67kV/mm. The phase difference of the.reduced displacement relative to the excitation force inverses in the case of resonance. A viscoelasticity model of the ER suspensions, which offers both the equivalent stiffness and the viscous damping, should be responsible for the appearance of resonance. The influence of the electric field on the resonance frequency and the resonance hump is consistent qualitatively with the interpretation of our proposed model. Storage modulus G′ was presented for the purpose of investigating this influence.
    Abstract: The resonance effect of microcrystalline cellulose/castor oil electrorheological (ER) suspensions was studied in a compressed oscillatory squeeze flow under external electric fields. The resonance frequency first increases linearly with increasing external field, and then shift to high-field plateau. The amplitudes of resonance peak increase sharply with the applied fields in the range of 0.17-1.67kV/mm. The phase difference of the.reduced displacement relative to the excitation force inverses in the case of resonance. A viscoelasticity model of the ER suspensions, which offers both the equivalent stiffness and the viscous damping, should be responsible for the appearance of resonance. The influence of the electric field on the resonance frequency and the resonance hump is consistent qualitatively with the interpretation of our proposed model. Storage modulus G′ was presented for the purpose of investigating this influence.
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  • 刊出日期:  2000-09-30

  • Department of Physics, Fudan University, Shanghai 200433, ChinabDepartment of Physics, Qiqihar University; Heilongjiang 161006, China
  • Department of Physics, Fudan University, Shanghai 200433, Chinab

摘要: The resonance effect of microcrystalline cellulose/castor oil electrorheological (ER) suspensions was studied in a compressed oscillatory squeeze flow under external electric fields. The resonance frequency first increases linearly with increasing external field, and then shift to high-field plateau. The amplitudes of resonance peak increase sharply with the applied fields in the range of 0.17-1.67kV/mm. The phase difference of the.reduced displacement relative to the excitation force inverses in the case of resonance. A viscoelasticity model of the ER suspensions, which offers both the equivalent stiffness and the viscous damping, should be responsible for the appearance of resonance. The influence of the electric field on the resonance frequency and the resonance hump is consistent qualitatively with the interpretation of our proposed model. Storage modulus G′ was presented for the purpose of investigating this influence.

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