Abstract
This paper focuses on analyzing the effect of geometrical parameters on structural performance of the ventilated brake disc. Multi-objective optimization through response surface methodology was deployed for improving the structural performance of ventilated brake discs. Simulation runs were designed based on central composite design technique. The second order regression models correlating the geometry parameters with maximum deformation and equivalent stress were developed. ANOVA was performed to test the significance of disc geometry parameters. The deformation and equivalent stress were influenced by flange outer peripheral radius. While the spigot radius had a significant effect on the deformation but not on equivalent stress. Also, the mounting surface radius influenced the equivalent stress developed on the ventilated brake disc rotor. The multi-objective optimization of geometrical characteristics for minimum deformation (4.2332 µm) and minimum equivalent stress (4.00989 MPa) yielded significant reduction in total deformation and equivalent stress i.e., 10.28 % and 9.12 % respectively at optimal levels of geometrical parameters.
Highlights
Ventilated brake discs were originally tested on racing cars in 1960s and are extensively used in automobile and railway brake system since
The main effects plot obtained for maximum deformation and equivalent stress is as shown in the Figs. 5-6
The ventilated brake disc was analyzed for maximum deformation and equivalent stress
Summary
Ventilated brake discs were originally tested on racing cars in 1960s and are extensively used in automobile and railway brake system since . Additional heat transfer occurs on the surface of the vent hall These ventilated brake discs require rapid cooling performance and robust structural design for which strength and stiffness are prime design criteria. The structural performance of ventilated brake discs is a function of disc geometry and material, a comprehensive study on optimal combination of geometric parameters needs to be carried out. In this process, optimizing a single performance characteristic may deteriorate the other design criteria and simultaneous optimization of the structural performance characteristics becomes necessary. Multi- objective optimization was carried out using Response surface methodology
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