Measurement of Load Distribution on Disc Brake Pads and Optimization of Disc Brakes Using the Ball Pressure Methods

1989 ◽  
Author(s):  
H. J. Tumbrink
Keyword(s):  
Load Distribution ◽  
Disc Brake ◽  
Brake Pads ◽  
Disc Brakes

Study on Influence of Air Pressure on Braking Condition

2005 ◽  
Author(s):  
D. Chen ◽  
P. Huang
Keyword(s):  
Friction Coefficient ◽  
Applied Load ◽  
Polymer Matrix Composite ◽  
Air Pressure ◽  
Experimental Results ◽  
Disc Brake ◽  
Temperature Peak ◽  
Brake Pads ◽  
Friction Heat ◽  
Disc Brakes

In the present paper, air pressure and temperature on the interface of the polymer matrix composite (PMC) brake pads are measured by disc brake under braking condition, and their influences are studied as well. The experimental results show that the air temperature peak is not as high as that on the surface. The air pressure of the interface varies with the applied load. The air pressure is negative under the small applied load, but positive under the large applied load. The analysis of the experimental results shows that the phenomena are caused by the friction heat and the rotate disc. Since the air pressure is very small comparing with applied load, it influences on the friction coefficient slightly. But, the negative air pressure of the interface increases the chance of the drag friction in the non-braking mode for disc brakes.

Flexural Effects in Disc Brake Pads

1978 ◽  
Vol 192 (1) ◽  
pp. 1-7 ◽  
Author(s):  
P. R. J. Harding ◽  
B. J. Wintle
Keyword(s):  
Load Distribution ◽  
Critical Length ◽  
Theoretical Treatment ◽  
Disc Brake ◽  
Computer Study ◽  
Simple Experiment ◽  
Structural Behaviour ◽  
Length Effect ◽  
Brake Pads ◽  
Element Technique

Details of the automobile disc brake are outlined, leading to the flexural requirements and construction of friction pad assemblies. A theoretical treatment of these is given, introducing the concept of a critical length which influences pressure distribution and reliability. A simple experiment which illustrates the critical length effect is described, with details of the experimental and theoretical correlation. The finite element technique is applied in a computer study of the structural behaviour of pad assemblies when subjected to various loads. Effects of load distribution, pad compression and backplate rigidity are discussed in the context of specific operational problems.

Optimization of Design of Railway Disc Brake Pads

1996 ◽  
Vol 210 (1) ◽  
pp. 51-61 ◽  
Author(s):  
N Benseddiq ◽  
D Weichert ◽  
J Seidermann ◽  
M Minet
Keyword(s):  
Element Model ◽  
Lower Surface ◽  
Disc Brake ◽  
Two Dimensional ◽  
Bearing Surface ◽  
Braking Performance ◽  
Brake Pads ◽  
Disc Brakes ◽  
Dimensional Finite Element

High temperatures are one of the main problems encountered in disc brakes, contributing to rapid wear and poor braking performance. In this paper, a two-dimensional finite element model using a thermomechanical algorithm is used to predict the evolution of the bearing surface and temperature distribution at the interface between the disc and pad. After determination of the temperature of a conventional brake configuration, the behaviour of several modified friction pad designs is simulated numerically in order to improve contact and so to achieve lower surface temperatures.

scholarly journals Thermal Analysis of a Disc

2021 ◽  
Vol 9 (10) ◽  
pp. 1910-1915
Author(s):  
Ratnajeet Wadile
Keyword(s):  
Thermal Analysis ◽  
Temperature Rise ◽  
Permissible Limit ◽  
Disc Brake ◽  
Brake Pads ◽  
Braking System ◽  
Analysis Tools ◽  
Disc Brakes ◽  
Ansys Workbench ◽  
Disk Brakes

Abstract: The disk brakes are special mechanized parts in a vehicle attached with the tires to help reduce the velocity of the vehicle. As the brake pads caused friction with the disc brakes, there is a temperature rise. Due to this there are great chances of disc brake’s failure if temperature rises above some permissible limit. Solidworks and ANSYS are the design and analysis tools which are used to accomplish this project. The disc brake was designed using Solidworks and it was analysed in ANSYS workbench. The main aim of this project is to analyse two-disc brakes manufactured with different materials to compare their properties and select one with most benefits. Keywords: ANSYS, FEA, Disc brake, Thermal analysis, braking system, Radiation.

scholarly journals Early Detection of Overheating in Motorcycle Disc Brakes Based on Arduino

Jurnal INFORM ◽  
2021 ◽  
Vol 6 (1) ◽  
pp. 21-27
Author(s):  
Yudi Kristyawan ◽  
Muchammad Asro Rofi’i
Keyword(s):  
Automatic Transmission ◽  
Disc Brake ◽  
Air Bubbles ◽  
System Failure ◽  
Test Results ◽  
Excessive Heat ◽  
Brake Pads ◽  
Braking System ◽  
Temperature Detection ◽  
Disc Brakes

The braking system is very important on a motorcycle. The primary function of the braking system is to slow down and even stop the motorcycle. The braking system using disc brakes on motorcycles is commonly used today, especially on automatic transmission motorcycles. One of the disadvantages of disc brakes is the heat caused by the disc's friction with the brake pads if you apply continuous braking. This continuous braking is often done by a motor rider when crossing downhill roads in mountainous areas. Excessive heat in the disc brakes causes the brake fluid to boil, resulting in air bubbles resulting in braking failure. The failure of the braking system on a motorcycle is hazardous for the rider and others. The experimental method detects braking system failure by catching the disc brake's temperature with a touchless temperature sensor, MLX90614. Temperature detection is processed with Arduino as a control, and the temperature is displayed on the LCD. If the disc brake temperature is above 200oC, a buzzer is activated as a warning to the driver. The test results show that the system can display a temperature reading on the LCD lower than the thermometer gun, with the most inferior reading difference of 0.2oC and the highest 0.4oC. The system can also display notifications to users on disc brake temperatures above 200oC, namely at temperatures of 211.1oC, 224.3oC, and 237.5oC, which were achieved at 200, 225, and 250 seconds.

scholarly journals Bicycle Disc Brake Thermal Performance: Combining Dynamometer Tests, Bicycle Experiments, and Modeling

Proceedings ◽  
2020 ◽  
Vol 49 (1) ◽  
pp. 100
Author(s):  
Ioan Feier ◽  
Joseph Way ◽  
Rob Redfield
Keyword(s):  
Thermal Model ◽  
Normal Force ◽  
Field Trials ◽  
Brake Disc ◽  
Disc Brake ◽  
Brake Pad ◽  
Brake Pads ◽  
Disc Brakes ◽  
Friction Curve ◽  
Friction Performance

High-power bicycle disc braking can create excessive temperatures and boiling brake fluid, resulting in performance degradation and damage. The goal of this work is to understand brake friction performance and thermal behavior for bicycle disc brakes. A previously described disc braking dynamometer is used to assess brake pad performance of sintered metallic brake pads, organic brake pads, and ‘power’ organic pads in up to 400 W of braking power. The friction coefficient is found to be dependent on both temperature and normal force. Friction curve fits are provided for temperatures between 300 K and 550 K. Organic and ‘power’ organic pads are found to have similar behavior, and have higher friction coefficients compared to metallic pads. Further, brakes on an instrumented bicycle are tested in outdoor field trials during downhill descent. A MATLAB thermal model successfully predicts the downhill field brake disc temperatures when using the friction data curve fits.

The Design of Disc Brake for Mine Hoist in Civil Engineering

2012 ◽  
Vol 568 ◽  
pp. 212-215 ◽  
Author(s):  
Hai Tao Zhang ◽  
Ying Jun Dai ◽  
Yu Jing Jia ◽  
Guang Zhen Cheng
Keyword(s):  
Salt Spray ◽  
Outer Cylinder ◽  
Positive Pressure ◽  
Brake Disc ◽  
Disc Brake ◽  
Brake Pads ◽  
Disc Brakes ◽  
Cylinder Piston ◽  
Set Up ◽  
Mine Hoist

This article will describe the research status and the features of control system of the disc brakes of mine hoist. The disc brakes consist of body, outer cylinder, cylinder, piston, ring, disc springs, plunger, gate disk and other components. The disc brakes use the pre-load of disc springs to force the piston to move towards the brake disc, push the brake pads out, then the brake pads and drum brake disc contact and resulting in positive pressure, then the formation of friction produce a braking torque. When the brake system loose pads, the cylinder is filled with the pressure oil, which make the piston compresses the disc springs, and promote the brake pads to move back and then left brake disc, remove the braking force. The hydraulic circuit of the braking system chooses two-way parallel oil and four oil cylinder brake. A slip road set up a one-way throttle, making the slip road brake slightly delayed, which will achieve two stage braking and make work more stable. This disc brake is normally closed, which means when the hoist does not work, the brake is in the state of braking to prevent the occurrence of accidents. This brake is safe, reliable and sensitive in action. The materials of brake pads is rigid asbestos plastic, which have stable friction coefficient, good wear resistance, is not sensitive to the aqueous medium and salt spray,it has flexible installation location, and it is easy to use, adjust and maintain.

A GUI-Based Computer Model for Simulation of Vibration in Automotive Caliper-Disc Brakes

2000 ◽  
Author(s):  
Glenn Meinhardt ◽  
Kambiz Farhang
Keyword(s):  
User Interface ◽  
Graphical User Interface ◽  
Computer Model ◽  
Material Properties ◽  
Energy Input ◽  
Disc Brake ◽  
Structural Components ◽  
Brake Pads ◽  
Constant Stiffness ◽  
Disc Brakes

Abstract Two computer models are presented that simulate the vibration response of an automotive caliper-disc brake system during braking. The computer programs, each represented by simulation block diagrams, are designed to solve a set of seven ordinary second order coupled differential equations. The first program analyzes the equations using a constant stiffness value for all structural components. The second program allows the user to modify the polynomials describing the contact normal and shear stiffnesses of both brake pads independently. The programs are modified and executed using a graphical user interface (GUI), which allows the user to modify all parameters of the simulation. This includes energy input, caliper and pad dimensional and material properties, and plot (output) parameters.

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.

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