Journal of Northeastern University Natural Science ›› 2018, Vol. 39 ›› Issue (2): 226-231.DOI: 10.12068/j.issn.1005-3026.2018.02.016

• Mechanical Engineering • Previous Articles     Next Articles

An Isolated Chain Rheological Shear Stress Model with Distance Weighted Coefficients

MA Liang1,2, XIAO Ping2, WANG Ren-sheng1,3, XIU Shi-chao1   

  1. 1.School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819,China; 2.Department of Mechanical Engineering, Xinjiang Institute of Engineering, Urumqi 830091,China; 3.School of Mechanical Engineering, Liaoning Institute of Science and Technology, Benxi 117004, China.
  • Received:2016-09-12 Revised:2016-09-12 Online:2018-02-15 Published:2018-02-09
  • Contact: MA Liang
  • About author:-
  • Supported by:
    -

Abstract: For reducing the error in calculating shear stress of high volume concentration magnetorheological fluids by applying standard isolated chain theoretical model, a new rheological model was proposed to evaluate interaction of magnetic chains by distance weighted coefficients. A Monte Carlo program was written for simulating position coordinates and direction of magnetic moment of carbonyl iron particles in magnetorheological fluids system, with two distance-related coefficients output. Comparing theoretical values of standard and distance weighted shear stress model with four magnetorheological fluids’ testing data that measured by rheometer, results indicated that distance model has higher computational accuracy at the whole experimental range of magnetic field than that using standard isolated chain-based one, and it generally aligned with rheological results, which proves interaction force between magnetic chains is one of impact factors that can significantly affect rheological characteristic of magnetorheological fluids.

Key words: magnetorheological fluid, rheological characteristic, distance weighted coefficient, shear yield stress, isolated chain model, Monte Carlo method

CLC Number: