Stability Optimization of a Disc Brake System with Hybrid Uncertainties for Squeal Reduction

Table 1

The initial values and the ranges of the investigated parameters.

Parameter	Unit	Initial value	Range
			Lower	Upper
Density of back plate	kg/dm^3	7.82	6.50	9.00
Elastic modulus of back plate	GPa	207	180	230
Thickness of back plate	mm	6.20	5.00	7.50
Density of friction material	kg/dm^3	2.51	2.259	2.761
Elastic modulus of friction material	GPa	5.94	4.752	7.128
Thickness of friction material	mm	12.0	8.5	12.5
Density of disc	kg/dm^3	7.20	6.48	7.92
Elastic modulus of disc	GPa	125	112.5	137.5
Thickness of disc	mm	20	18.5	20.5
Brake pressure	MPa	0.5	0.45	0.55
Friction coefficient	—	0.32	0.26	0.38