scholarly journals Estimation of automotive brake drum-shoe interface friction coefficient under varying conditions of longitudinal forces using Simulink

Friction ◽  
2015 ◽  
Vol 3 (3) ◽  
pp. 214-227 ◽  
Author(s):  
H. P. Khairnar ◽  
V. M. Phalle ◽  
S. S. Mantha
Keyword(s):  
Friction Coefficient ◽  
Interface Friction ◽  
Brake Drum ◽  
Automotive Brake

scholarly journals Cupronickel B10 and YG6 interface friction characteristics tested on a friction device for metal cutting

2019 ◽  
Vol 11 (11) ◽  
pp. 168781401989022
Author(s):  
Chunjian Liu ◽  
Daochun Xu ◽  
Qingqing Li
Keyword(s):  
Friction Coefficient ◽  
Metal Cutting ◽  
Vibration Reduction ◽  
Interface Temperature ◽  
Friction Behavior ◽  
Conduction Model ◽  
Friction Characteristics ◽  
Interface Friction ◽  
Cupronickel B10 ◽  
Solid Liquid

Friction behavior is an important component of the metal-cutting mechanism. A simple and effective friction device that can yield the desired friction characteristics is required. In this article, a friction device with a solid–liquid–gas vibration reduction was proposed to research the interface friction characteristics. The interface friction characteristics of cupronickel B10 and YG6 were obtained through the new friction device, including the friction force, friction temperatures, and friction coefficient. The results show that an experimental solid–liquid–gas vibration reduction is feasible and effective to obtain the interface friction characteristics. The relationship between the friction-interface temperature T2 and the measured-point temperature T1 that was obtained by a heat-conduction model is linear. For cupronickel B10 and YG6, the friction coefficient gradually decreases with an increase in friction speed, and increases initially and then decreases with an increasing load. Based on the effect of friction temperature, friction speed, and load, a friction model for the interface friction characteristics of cupronickel B10 and YG6 was obtained.

The effect of boron on the performance of automotive brake

2013 ◽  
Vol 10 (6) ◽  
pp. 523-528 ◽  
Author(s):  
A. Muzathik ◽  
Y. Nizam ◽  
M. Ahmad ◽  
W. Nik
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Friction Material ◽  
Brake System ◽  
Brake Pad ◽  
Brake Pads ◽  
Brake Performance ◽  
Single Material ◽  
Automotive Brake

Friction material in an automotive brake system plays an important role for effective and safe brake performance. A single material has never been sufficient to solve performance related issues. Current research aimed to examine properties of Boron mixed brake pads by comparing them with the commercial brake pads. Friction coefficient of Boron mixed brake pads and commercial brake pads were significantly different and increased with the increase in surface roughness. The abrupt reduction of friction coefficient is more significant in commercial brake pad samples than in Boron mixed brake pad formulations. Fade occurred in commercial brake pad sample at lower temperatures. Boron formulations are more stable than their commercial counterparts.

The effect of colemanite on the friction performance of automotive brake friction materials

2016 ◽  
Vol 68 (1) ◽  
pp. 92-98 ◽  
Author(s):  
ilker Sugozu ◽  
ibrahim mutlu ◽  
Kezban Banu Sugozu
Keyword(s):  
Friction Coefficient ◽  
Friction And Wear ◽  
Negative Effects ◽  
Wear Performance ◽  
Industrial Firms ◽  
Friction Materials ◽  
Content Type ◽  
Friction Performance ◽  
Brake Lining ◽  
Automotive Brake

Purpose – The purpose of this paper is to investigate use of colemanite (C) upon friction and wear performance of automotive brake lining. Brake lining production with the boron product colemanite addition and braking characterization investigated for development of non-asbestos organic (NAO) brake lining because of negative effects on human health and environmental hazard of asbestos containing linings. During the braking, brake lining is warmed up extremely due to friction, and the high temperature causes to decreasing of breaking performance. Colemanite has high melting temperature, and this makes this material valuable for brake lining. Design/methodology/approach – This study investigated the effect of colemanite (C) upon friction and wear performance of automotive brake lining. Based on a simple experimental formulation, different amounts of boron product colemanite were used and then evaluated using a friction assessment and screening test. In these specimens, half of the samples (shown with H indices) were heat treated in 4 h at 180°C temperature. Friction coefficient, wear rate and scanning electron microscope for friction surfaces were used to assess the performance of these samples. Findings – The results of test showed that colemanite can substantially improve properties of friction materials. The friction coefficient of friction materials modified with colemanite varies steadily with the change of temperature, and the wearing rate of friction materials is relatively low by using colemanite. Heat treatment-applied samples (CH) have provided a higher and stable friction coefficient. These results indicate that colemanite has ideal application effect in various friction materials. Originality/value – This paper fulfils an identified information and offers practical help to the industrial firms working with brake lining and also to the academicians working on wear of materials. Parallel results have been presented between previously reported and present study, in view of brake characteristics and wear resistance. Use of the lower cost and productive organic sources of material are the main improvement of the present study.

Experimental Study on the Interface Characteristics of Geogrid-Reinforced Fly Ash

2012 ◽  
Vol 446-449 ◽  
pp. 264-268 ◽  
Author(s):  
Wei Shi ◽  
Jin Han ◽  
Yuan Hao Jiang ◽  
Yong Bin Li
Keyword(s):  
Experimental Study ◽  
Fly Ash ◽  
Friction Coefficient ◽  
Reinforced Soil ◽  
Paper Study ◽  
Water Impact ◽  
Interface Friction ◽  
Pull Out ◽  
Interface Characteristics ◽  
Interface Parameters

The technology of Reinforced soil has been widely used in civil engineering, its theory has some development . However, there is nearly any study about the theory of Geogrid-reinforced fly ash .In this paper, study the interface characteristics between fly ash and geogrid through the pull-out test,reach the following conclusions:the size of normal stress and water impact the interface parameters between the geogrid and fly ash;the interface friction coefficient between Geogrid and fly ash is small,adding gravel to fly ash can improve the interface friction coefficient between geogrid and fly ash.

scholarly journals Experimental study on mechanical properties of steel - sand interface

2020 ◽  
Vol 143 ◽  
pp. 01030
Author(s):  
Zhaoxiao Fang ◽  
Weijiang Wang ◽  
Zhaoli Fang
Keyword(s):  
Mechanical Properties ◽  
Particle Size ◽  
Friction Coefficient ◽  
Average Particle Size ◽  
Average Particle ◽  
Shear Tests ◽  
Axial Pressure ◽  
Interface Shear ◽  
Interface Friction ◽  
Sand Particles

The interface between steel and sand can be regard as a steel-sand system, and its mechanical properties have an important role in many geotechnical applications. The mechanical properties of various steel-sand interfaces classified by sand mean particle size D50 were investigated through interface shear tests. The results show that for a given steel-sand interface, the peak strength of the interface increase with increasing axial pressure. As the D50 value increases, the cohesions for steel-sand interfaces decrease, while the friction angles of the interfaces first increase and then decrease. In the process of shearing, the shrinkage of steel-sand interface occurs, mainly due to the broken of sand particles. The decrease in interface friction coefficients due to an increase in axial pressure was observed. Particle size distribution has a significant effect on the interface friction coefficient of steel-sand interface. When the average particle size D50 changes from 0.1 mm to 0.47 mm, the friction coefficient of steel-sand interface increases by 134%-161%.

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