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논문 기본 정보

자료유형
학술저널
저자정보
저널정보
한국기계가공학회 한국기계가공학회지 한국기계가공학회지 제3권 제2호
발행연도
2004.6
수록면
67 - 72 (6page)

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초록· 키워드

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Electro-Rheological(ER) fluids consist of suspensions of fine polarizable particles In a dielectric oil, which upon application of an external electric field control take on the characteristics of the Bingham solid. In this study, the temperature dependence of the viscosity was Investigated for an ER fluid consisting of 35 Weight % of zeolite particles in hydraulic oil 46cSt. Thermal activation analysis was performed by changing the ER fluid's temperature from -10°C to 50 °C. According to the analysis, the activation energy for flow of the ER fluid was 79.6 kJ/mole without applying electric field On the other hand, with the electnc field of 2kV/mm, the lmeanty between viscosity and temperature was not existed By changing the temperatures the viscosity (or shear stress) versus shear rates were measured In this experiment shear rates were increased from 0 to 200s.1 in 2 minutes
Generally, the hydraulic oil 46cSt will be operated at the temperature of about 40°C, thus, the ER fluid's electric field dependence of viscosity was examined at this temperature. Also, an influence of adding the dispersant(Carbopl 940) on ER effect was discussed

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ABSTRACT

1. Introduction

2. Chemical Properties of ER Fluids

3. Experiment

4. Results and Discissions

5. Conclusions

References

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