Fatigue and dynamic analysis on a disc brake with different slots in the friction material under finite life condition

2022 ◽  
Vol 16 (1) ◽  
pp. 132
Author(s):  
Suman Koka Naga Sai ◽  
Naresh Kumar Konada
Keyword(s):  
Dynamic Analysis ◽  
Friction Material ◽  
Disc Brake ◽  
Life Condition

Braking performance of a novel frictional-magnetic compound disc brake for automobiles

2018 ◽  
Vol 233 (10) ◽  
pp. 2443-2454 ◽  
Author(s):  
Yan Yin ◽  
Jiusheng Bao ◽  
Jinge Liu ◽  
Chaoxun Guo ◽  
Tonggang Liu ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Temperature Rise ◽  
Friction Material ◽  
Maximum Temperature ◽  
Interface Temperature ◽  
Disc Brake ◽  
Braking Performance ◽  
Maximum Temperature Rise ◽  
Disc Brakes ◽  
Braking Torque

Disc brakes have been applied in various automobiles widely and their braking performance has vitally important effects on the safe operation of automobiles. Although numerous researches have been conducted to find out the influential law and mechanism of working condition parameters like braking pressure, initial braking speed, and interface temperature on braking performance of disc brakes, the influence of magnetic field is seldom taken into consideration. In this paper, based on the novel automotive frictional-magnetic compound disc brake, the influential law of magnetic field on braking performance was investigated deeply. First, braking simulation tests of disc brakes were carried out, and then dynamic variation laws and mechanisms of braking torque and interface temperature were discussed. Furthermore, some parameters including average braking torque, trend coefficient and fluctuation coefficient of braking torque, average temperature, maximum temperature rise, and the time corresponding to the maximum temperature rise were extracted to characterize the braking performance of disc brakes. Finally, the influential law and mechanism of excitation voltage on braking performance were analyzed through braking simulation tests and surface topography analysis of friction material. It is concluded that the performance of frictional-magnetic compound disc brake is prior to common brake. Magnetic field is greatly beneficial for improving the braking performance of frictional-magnetic compound disc brake.

Performance of Non Asbestos Disc Brake Friction Material for Automotive Application - An Experimental Case Study

2010 ◽  
Author(s):  
Pradnya Eknath Kosbe ◽  
Niteen Sahasrabudhe ◽  
Rahul Khandagale ◽  
Rajendra Kulkarni
Keyword(s):  
Friction Material ◽  
Automotive Application ◽  
Disc Brake ◽  
Brake Friction Material

The Study of Disc Brake Noise on Three Different Types of Friction Materials

2014 ◽  
Vol 663 ◽  
pp. 113-118 ◽  
Author(s):  
Ahmad Razimi Mat Lazim ◽  
Abd Rahim Abu Bakar ◽  
Mohamed Kchaou
Keyword(s):  
Friction Material ◽  
Pressure Level ◽  
Material Composition ◽  
Disc Brake ◽  
The Road ◽  
Before And After ◽  
Squeal Noise ◽  
The Relationship ◽  
Brake Noise ◽  
Brake Friction Material

This work investigates the effect of road grit particles and material compositions on disc brake squeal noise. Three different Non Asbestos Organic (NAO) brake pad samples and road particles with a size range between 400 μm to 500 μm are used in the squeal experiment. The relationship between the existence of road particle with the noise occurrence were studied through the change in pressure level, friction coefficient (CoF), sound pressure level (SPL) and material composition. The material compositions were analyzed before and after squealing condition using energy dispersive X-ray analysis (EDX). Result has shown the road particles contribute to the emission of squeal noise and the increasing of some material composition of brake friction material components.

scholarly journals Design and Analysis of Disc Brake using ANSYS

2019 ◽  
Vol 8 (4) ◽  
pp. 10468-10470
Keyword(s):  
Friction Material ◽  
Heat Fluxes ◽  
Disc Brake ◽  
Pressurized Water ◽  
Flow Rates ◽  
Brake Rotor ◽  
Solid Works ◽  
Element Technique ◽  
Two Sides

Braking is a procedure that changes over the kinetic vitality of a vehicle into mechanical vitality, which must dissipate heat. A brake plate generally made of cast iron or clay composites is connected to the wheel. The friction material of brakes (i.e) brake cushions is upheld precisely by using pressurized water, pneumatically or electromagnetically to the two sides of the plate which holds the wheel. The present examination basically manages the modeling and breaking down a ventilated circle brake by Solid works and ANSYS. FE models of the brake are molded with solid works and reproduced by utilizing ANSYS which depends on the finite element technique (FEM). This thermal investigation is done as such as to get the quality of the brake. The suitable design is found and heat flow rates and heat fluxes in the thermal examination, are considered by fluctuating the cross segments and materials of the disc brake rotor

Dynamic surface characteristics during disc brake squeal: non-linear modelling and simulation

2011 ◽  
Vol 225 (6) ◽  
pp. 1341-1348
Author(s):  
J Kang
Keyword(s):  
Contact Area ◽  
Travelling Wave ◽  
Friction Material ◽  
Brake System ◽  
Surface Pattern ◽  
Disc Brake ◽  
Dynamic Surface ◽  
Stick Slip ◽  
Non Linear ◽  
Lift Off

This article studies the non-linear dynamic behaviour of a disc brake system during squealing induced by a disc doublet mode. The disc brake system is modelled as a rotating annular plate in contact with annular sector-friction material. In order to investigate the possibility of detachment over the contact area between the disc surface and friction material during squealing, the lift-off condition is applied to this model. Also, the non-linearity arising from the contact stiffness is considered on the basis of the load–deflection test for the friction material. Numerical results show that the vibration after the onset of squeal reaches the limit cycle. In the steady-squealing response, several interesting phenomena are observed: the stick-slip and lift-off over the specific regime of the contact area. It is shown that the dynamic surface pattern rotates due to the forward travelling wave of the squealing surface. However, the mark of the surface pattern does not seem to move because the speed of the travelling wave fluctuates at a double frequency of squeal vibration.

Effect of contact area variation on squeal propensity of disc modes

2012 ◽  
Vol 226 (10) ◽  
pp. 2467-2473 ◽  
Author(s):  
Jaeyoung Kang
Keyword(s):  
Finite Element Method ◽  
Finite Element ◽  
Contact Area ◽  
Contact Geometry ◽  
Friction Material ◽  
Contact Length ◽  
Disc Brake ◽  
The Finite Element Method ◽  
Annular Sector ◽  
Area Variation

The squeal propensity associated with the contact area variation is studied using the finite element method and the analytical contact and rotating modeling. The disc brake system is modeled as a rotating finite element disc in contact with annular sector-friction material. The squeal propensity is numerically determined with respect to the contact span angle and the radial contact length which define the contact geometry. The results show that the squeal propensity is strongly influenced by the contact area variation. Particularly, the squeal propensity of the transverse doublet mode changes periodically with the variation of the contact span angle. However, the in-plane dominant modes have the decreased squeal tendency as the span angle increases. The variation in the radial contact length is also shown to make contribution to the change in squeal propensity for both the transverse and in-plane modes.

scholarly journals Influence of Material-Dependent Damping on Brake Squeal in a Specific Disc Brake System

2021 ◽  
Vol 11 (6) ◽  
pp. 2625
Author(s):  
Juraj Úradníček ◽  
Miloš Musil ◽  
L’uboš Gašparovič ◽  
Michal Bachratý
Keyword(s):  
Dynamic Instability ◽  
Friction Material ◽  
System Stability ◽  
Brake System ◽  
Brake Disc ◽  
Disc Brake ◽  
Fe Model ◽  
Brake Squeal ◽  
Friction Forces ◽  
General Material

The connection of two phenomena, nonconservative friction forces and dissipation-induced instability, can lead to many interesting engineering problems. We study the general material-dependent damping influence on the dynamic instability of disc brake systems leading to brake squeal. The effect of general damping is demonstrated on minimal and complex models of a disc brake. Experimental analyses through the frequency response function (FRF) show different damping of the brake system coalescent modes, indicating possible dissipation-induced instability. A complex system including material-dependent damping is defined in commercial finite element (FE) software. A FE model validated by experimental data on the brake-disc test bench is used to compute the influence of a pad and disc damping variations on the system stability using complexe igenvalue analysis (CEVA). Numerical analyses show a significant sensitivity of the experimentally verified unstable mode of the system to the ratio of the damping between the disc and the friction material components.

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