Numerical and experimental studies on a novel magneto-rheological fluid brake based on fluid-solid coupling

Area of Science:

• Mechanical Engineering
• Materials Science
• Fluid Dynamics

Background:

• Magneto-rheological (MR) fluid brakes are crucial for braking systems.
• Understanding fluid-solid coupling effects is vital for MR fluid brake performance.
• Heat dissipation remains a significant challenge, especially during emergency braking.

Purpose of the Study:

• To propose and analyze a novel magneto-rheological fluid brake design.
• To address the critical issue of heat dissipation in MR fluid brakes.
• To investigate the fluid-solid coupling effects under various operating conditions.

Main Methods:

• Theoretical modeling using a modified Bingham model and apparent equivalent viscosity.
• Numerical simulations of magnetic, flow, and temperature fields using COMSOL software.
• Experimental validation of the prototype on an inertia brake test system.

Main Results:

• The magnetic circuit design was confirmed as feasible through magnetic induction intensity distribution.
• Simulations showed good agreement with experimental results for braking torque, motion parameters, and surface temperature.
• The novel design demonstrated partially improved heat dissipation capabilities.

Conclusions:

• The proposed magneto-rheological fluid brake design is viable and offers enhanced heat dissipation.
• The study validates the effectiveness of the theoretical and numerical models used.
• Findings contribute to the optimization and design of future MR fluid brake systems.