On the Analysis of Brake Squeal Propensity Using Finite Element Method

Blaschke, Peter; Tan, M.J.; Wang, A.

doi:10.4271/2000-01-2765

Cited by 32 publications

(13 citation statements)

References 6 publications

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“…In some recent papers on disc brake squeal [6][7][8][9][10], contact analysis forms part (the first phase) of the whole analysis procedure. In this sense, the present study also offers an improvement on the CAE simulation work.…”

Section: Introductionmentioning

confidence: 99%

Interface Pressure Distributions Through Structural Modifications

Bakar

Ouyang

Cao

2003

SAE Technical Paper Series

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Due to the friction forces acting at the rotor and pads interface, the pressure distribution at the interface is asymmetric in a disc brake system of normal floatingtype caliper design. The asymmetry and the high unevenness of the interface pressure distribution cause uneven wear and shorten life of pads. It has been speculated that these undesirable features promote disc brake squeal. This paper investigates the contact (interface) pressure distributions at the rotor and piston-pad interface in response to several ideas of simulated structural (geometric or material) modifications. These modifications are made on the pads and/or at the interface between the piston and the back plate or at the pad guide. A detailed finite element model is constructed taking into account all significant contact interfaces between disc brake components. Sliding frictional contact is analyzed to obtain the interface pressure distributions. A plausible modification is identified which offers improved interface pressure distributions against wear. This work may also help create a good design of disc brakes for improved noise performance as well.

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Section: Introductionmentioning

confidence: 99%

Interface Pressure Distributions Through Structural Modifications

Bakar

Ouyang

Cao

2003

SAE Technical Paper Series

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“…This method was first used on lumped models (Kinkaid et al, 2003;Ibrahim, 1994). Then, improvements in computer systems have made it possible to perform analyses on finite element (FE) models (Liles, 1989;Lee et al, 1998;Blaschke et al, 2000;Bajer et al, 2003;AbuBakar et al, 2006;Liu et al, 2007;Mario et al, 2008;Dai et al, 2008).…”

Section: Complex Eigenvalue Analysismentioning

confidence: 99%

“…There are two main categories of numerical methods that are used to study this problem: (1) transient dynamic analysis (Hu et al, 1999;AbuBakar et al, 2006) and (2) complex eigenvalue analysis. Currently, the complex eigenvalue method is preferred and widely used (Liles, 1989;Lee et al, 1998;Blaschke et al, 2000;Bajer et al, 2003;AbuBakar et al, 2006;Liu et al, 2007;Mario et al, 2008;Dai et al, 2008) in predicting the squeal propensity of the brake system including damping and contact due to the quickness with which it can be analysed and its usefulness in providing design guidance by analysing with different operating parameters virtually.…”

Section: Introductionmentioning

confidence: 99%

A combined approach of complex eigenvalue analysis and design of experiments (DOE) to study disc brake squeal

Ghazaly¹,

Mathivanan²,

Srinivasan³

2010

Int. J. Eng. Sci. Tech

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This paper proposes an approach to investigate the influencing factors of the brake pad on the disc brake squeal by integrating finite element simulations with statistical regression techniques. Complex eigenvalue analysis (CEA) has been widely used to predict unstable frequencies in brake systems models. The finite element model is correlated with experimental modal test. The 'input-output' relationship between the brake squeal and the brake pad geometry is constructed for possible prediction of the squeal using various geometrical configurations of the disc brake. Influences of the various factors namely; Young's modulus of back plate, back plate thickness, chamfer, distance between two slots, slot width and angle of slot are investigated using design of experiments (DOE) technique. A mathematical prediction model has been developed based on the most influencing factors and the validation simulation experiments proved its adequacy. The predicted results show that brake squeal propensity can be reduced by increasing Young's modulus of the back plate and modifying the shape of friction material by adding chamfer on both sides of friction material and by introducing slot configurations. The combined approach of modeling brake squeal using CEA and DOE is found to be statistically adequate through verification trials. This combined approach will be useful in the design stage of the disc brake.

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“…In recent years, the finite element (FE) method [1,23,[26][27][28][29] has gained wide acceptance for analyzing many varieties of complex problems in structural dynamics, including some of the more intricate brake vibrations and noise problems. Although successful cases studies have been reported from time to time, no real reliable brake noise prevention tool truly exist yet.…”

Section: Introductionmentioning

confidence: 99%