Evaluation of Techniques for Measuring the Yield Stress of a Magnetorheological Fluid

Applied Rheology

Jönkkäri Ilari¹  Syrjälä Seppo¹ 

[1] Department of Materials Science, Tampere University of Technology, P.O. 589, 33101Tampere, Finland;

关键词: magnetorheological fluid;    yield stress;    rotational rheometer;   

DOI  :  10.3933/applrheol-20-45875

来源: DOAJ

【 摘 要 】

The yield stress of a magnetorheological fluid was measured as a function of magnetic flux density using different techniques. The yield stress values were determined by extrapolating the experimental shear stress-shear rate data to zero shear rate with the help of Bingham and Herschel-Bulkley models, and by using stress ramp and dynamic oscillatory tests. To obtain the rheological data, the rotational rheometer equipped with a magnetic field generator and a plate-and-plate measuring geometry was used. The different methods produced yield stress values which were in reasonable agreement with each other.

【 授权许可】

Unknown