Experimental studies of friction-induced brake squeal: Influence of environmental sand particles in the interface brake pad-disc

2017 ◽  
Vol 110 ◽  
pp. 307-317 ◽  
Author(s):  
M. Kchaou ◽  
A.R. Mat Lazim ◽  
M.K. Abdul Hamid ◽  
A.R. Abu Bakar
Keyword(s):  
Experimental Studies ◽  
Brake Pad ◽  
Brake Squeal ◽  
Sand Particles

Influence of Silica Sand Particles on Disc Brake Squeal Noise

2013 ◽  
Vol 471 ◽  
pp. 81-85 ◽  
Author(s):  
Ahmad Razimi Mat Lazim ◽  
Abd Rahim Abu Bakar ◽  
Mohd Kameil Abdul Hamid ◽  
Izzat Mohd Asri
Keyword(s):  
Surface Condition ◽  
Surface Characteristics ◽  
Silica Sand ◽  
Brake Pad ◽  
Brake Squeal ◽  
The Road ◽  
Film Distribution ◽  
Before And After ◽  
Sand Particles ◽  
On The Road

Researchers in recent years begin to explore on tribological behavior of automotive brake squeal phenomena which covers the morphology, chemical composition, friction and wear, phase composition and third body or friction film distribution. However less effort has been made to study the tribological on the influence of small particles on brake squeal. During braking condition, both rotor and pads are exposed to road environmental particle which may affect pads surface condition. In order to assess the influence of this particle on brake squeal a series of squeal tests were performed. Silica sand grit particles with a size range between 400 to 200 μm which most available on the road surface were used in this experiment. Brake pad and disc surface characteristics were analyzed before and after squealing condition using Scanning Electron Microscope (SEM) and Energy dispersive X-ray analysis (EDX). The result shows that the silica sand particles had influence the squeal and surface behavior of the brake pad.

Tribological and dynamical analysis of a brake pad with multiple blocks for a high-speed train

2019 ◽  
Vol 234 (11) ◽  
pp. 1771-1788
Author(s):  
YK Wu ◽  
JL Mo ◽  
B Tang ◽  
JW Xu ◽  
B Huang ◽  
...  
Keyword(s):  
High Speed ◽  
Wear Behavior ◽  
Dynamical Analysis ◽  
Brake Disc ◽  
Brake Pad ◽  
High Speed Train ◽  
Brake Squeal ◽  
Element Analysis ◽  
Single Block ◽  
Middle Ring

In this research, the tribological and dynamical characteristics of a brake pad with multiple blocks are investigated using experimental and numerical methods. A dynamometer with a multiblock brake pad configuration on a brake disc is developed and a series of drag-type tests are conducted to study the brake squeal and wear behavior of a high-speed train brake system. Finite element analysis is performed to derive physical explanations for the observed experimental phenomena. The experimental and numerical results show that the rotational speed and braking force have important influences on the brake squeal; the trends of the multiblock and single-block systems are different. In the multiblock brake pad, the different blocks exhibit significantly different magnitudes of contact stresses and vibration accelerations. The blocks located in the inner and outer rings have higher vibration acceleration amplitudes and stronger vibration energies than the blocks located in the middle ring.

scholarly journals Influence of dynamic brake pad properties on automotive disk brake squeal

PAMM ◽  
2011 ◽  
Vol 11 (1) ◽  
pp. 345-346 ◽  
Author(s):  
Sylwia Hornig ◽  
Nils Gräbner ◽  
Utz von Wagner
Keyword(s):  
Brake Pad ◽  
Brake Squeal ◽  
Disk Brake

scholarly journals 210 Influences of Brake Pad Thickness on Disk Brake Squeal

2009 ◽  
Vol 2009 (0) ◽  
pp. _210-1_-_210-6_
Author(s):  
Kyoko KOSAKA ◽  
Yukio NISHIZAWA ◽  
Yutaka KURITA ◽  
Yasunori OURA
Keyword(s):  
Brake Pad ◽  
Brake Squeal ◽  
Disk Brake

Effects of Pad Surface Topography on Disc Brake Squeal

2012 ◽  
Vol 165 ◽  
pp. 58-62 ◽  
Author(s):  
Ahmad Razimi Mat Lazim ◽  
Mohd Kameil Abdul Hamid ◽  
Abd Rahim Abu Bakar
Keyword(s):  
Surface Topography ◽  
Optical Microscope ◽  
Frequency Noise ◽  
Brake Pad ◽  
Brake Squeal ◽  
Stick Slip ◽  
Disc Brakes ◽  
Brake Dynamometer ◽  
Warranty Claims ◽  
Microscopic Techniques

Brake squeal has always been a major NVH problem to many car makers due to significant number of warranty claims. Brake squeal is a high frequency noise (above 1 kHz) emanating from car disc brakes that get excited due to one or more mechanisms such as mode coupling, stick-slip, hammering and sprag-slip. This paper attempts to investigate the effects of brake pad surface topography on squeal generation. Two pairs of a non-asbestos organic (NAO) brake pad will be tested on a brake dynamometer test rig. Surface topography of the brake pad will be analyzed through microscopic techniques using energy dispersive X-ray analysis (EDX), and optical microscope.

scholarly journals Influence of Brake Pad Thickness on Disk Brake Squeal

2010 ◽  
Vol 4 (6) ◽  
pp. 970-983 ◽  
Author(s):  
Yasunori OURA ◽  
Yutaka KURITA ◽  
Yukio NISHIZAWA ◽  
Kyoko KOSAKA
Keyword(s):  
Brake Pad ◽  
Brake Squeal ◽  
Disk Brake

A new approach considering the brake pad geometry in brake squeal

2019 ◽  
Vol 89 (10) ◽  
pp. 2075-2088
Author(s):  
Ahmed Ghorbel ◽  
Bacem Zghal ◽  
Moez Abdennadher ◽  
Lassaad Walha ◽  
Mohamed Haddar
Keyword(s):  
Brake Pad ◽  
Brake Squeal ◽  
New Approach

Experimental studies of shock-induced particle jetting

2018 ◽  
Vol 32 (12n13) ◽  
pp. 1840034
Author(s):  
Kun Xue ◽  
Kaiyuan Du ◽  
Xiaoliang Shi
Keyword(s):  
Shock Front ◽  
Quartz Sand ◽  
Experimental Studies ◽  
Force Chains ◽  
Two Dimensional ◽  
Boundary Tracking ◽  
Tracking Technique ◽  
Sand Particles ◽  
Particle Jetting

The dispersion of particle rings or shells by a radially divergent shock front trailed by the pressurized gases takes the form of hierarchical particle jetting. Through a semi-two-dimensional configuration, we characterize the evolution of the jetting pattern using the boundary tracking technique. In contrast to the refined filamentary jetting spread induced by the dispersal of soft and ductile flour particles, the hard and brittle quartz sand particles are dispersed into a finger-like branched pattern with much fewer jets. The interplay between the primary and secondary jets suffices to reverse the flour jetting pattern, which by contrast is negligible in the quartz sand jetting. The distinct jetting patterns displayed by the flour and quartz sand particles are related with the distinguishable networks of force chains invoked in two particles which dictate the nucleation of jets.

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