Study and Design of Double Shear Regional Magnetic Rheometer

Abstract:

A shear magnetic rheometer with a dual MRF shear region has been designed. The effect of magnetic rheometer gap MRF magneto-rheological on the torque measurement has been took full account, so the measurement accuracy improved. The design process using the Equivalent Magnetic Circuit Method to calculate the reluctance of each local area of magnetic rheometer, and use magnetic potential equation calculate the number of coils required for magnetic rheometer. Finally, used ANSYS software simulation analysis of the magnetic field of the magnetic rheometer, proposed fractional differential equations to describe the relationship between the MRF shear stress, shear rate and time, and using nonlinear least-squares method to fit the coefficients of fractional differential equations. The results show that the magnetic field of the two MRF regions is evenly distributed and the difference in the magnetic flux density of the two MRF regions within the ideal range; Coefficients and orders of fractional differential equations affected by the magneto-rheological fluid nature and speed.

• Periodical: Applied Mechanics and Materials (Volumes 275-277)
• Pages: 771-777
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.275-277.771
• Online since: January 2013
• Authors: Yue Kun Zheng, Yi Jian Huang
• Keywords: ANSYS, Equivalent Magnetic Circuit Method, Fractional Differential Equations, Magnetic Potential Equation, Magnetic Rheometer

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