A magnetorheological fluid shear yield stress testing device with a cone‐recess interlocking shear fixture

Testing the rheological properties of magnetorheological fluids often faces challenges in measurement accuracy and magnetic field uniformity. To address these, this study proposes a novel cone‐recess interlocking shear fixture for measuring magnetic flux density and shear yield stress. Finite element analysis simulated the device's magnetic circuit and flux distribution. Comparative experiments confirmed its uniform magnetic field, direct flux density measurement, and high accuracy and repeatability in shear yield stress testing.