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Relevant bibliographies by topics / Disc brake material

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Academic literature on the topic 'Disc brake material'

Author: Grafiati

Published: 4 June 2021

Last updated: 4 February 2022

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Journal articles on the topic "Disc brake material"

1

Shinde, Dinesh, Mukesh Bulsara, and K. N. Mistry. "Tribological performance of non-asbestos brake friction material in contact with brake disc of varying topography." Industrial Lubrication and Tribology 72, no. 10 (2020): 1277–83. http://dx.doi.org/10.1108/ilt-04-2020-0120.

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Purpose The purpose of this paper is to evaluate experimentally the influence of different surface roughness of the contacting disc on tribological performance of the non-asbestos brake friction material (BFM). Design/methodology/approach Taguchi method was applied to design an experiment using three different discs of gray cast iron with different surface roughness, which is measured using optical profilometer. These discs were subjected to sliding against pins prepared with the developed non-asbestos BFM, using pin on disc friction and wear monitor. Findings The experimental results shows that the disc 2 (Ra = 3.77 µm) gives wear of 22.78 µm and coefficient of friction of 0.462, which is recommended for extreme brake performance. Analysis of Taguchi design revealed that the disc surface was most significant parameter among the parameters under study. Practical implications During braking, continuous sliding between the BFM and brake disc or drum not only results into wear of BFM but also changes the surface finish of the brake drum or disc. This leads to variation in surface topography of the drum or disc surface with application of brakes, which further affects the characteristics of the BFM. Originality/value The tribological performance of BFM depends upon the topography of the surface on which it was sliding. To get best performance of the non-asbestos friction materials, disc having moderate surface finish is recommended. Scanning electron microscope micrographs had shown the different plateaus formed and energy-dispersive X-ray spectroscopy spectra identified presence of different chemical elements prior to sliding of the pins surface over different discs surface topography. Peer review The peer review history for this article is available at: https://publons.com/publon/10.1108/ILT-04-2020-0120/

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Li, Wanyang, Xuefeng Yang, Shouren Wang, Jupeng Xiao, and Qimin Hou. "Comprehensive Analysis on the Performance and Material of Automobile Brake Discs." Metals 10, no. 3 (2020): 377. http://dx.doi.org/10.3390/met10030377.

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This article reviews the current status of automotive brake disc research and the prospects for future research. At present, the research of brake disc performance mainly includes thermal conductivity, thermal fatigue resistance, wear resistance, and brake noise. It is found that a new alloy composite, heat treatment process, ceramic composite, new structure, and new materials are emerging. At the same time, it was found that ceramic and resin were used as the matrix, fiber materials were used as reinforcements to prepare brake discs, the addition of new fillers and the study of special reinforcement materials have become new hotspots in the study of brake discs. In the future development, carbon-fiber ceramic brake discs may become the main research focus of brake discs.

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Petre, Ivona, Aurora Anca Poinescu, Adrian Catangiu, and Simona Mihai. "Studies Regarding the Reaction Method to Wear Braking Mechanism." Scientific Bulletin of Valahia University - Materials and Mechanics 15, no. 12 (2017): 37–42. http://dx.doi.org/10.1515/bsmm-2017-0007.

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Abstract With the development of industry have made efforts to improve the performance of braking systems of motor vehicles on public roads. The choice of materials used for coupling brake system involved the development of new materials that meet safety requirements in circulation. During braking of any vehicle, due to the friction created between the disk and pad, temperature rise occurs with negative effects on the process of slowing down the vehicle. Mechanical and thermal stress being put on the brakes is very high. Due to overheating, brake discs and pads may warp or crack, and the material they are made may their change its structure. These defects give rise to vibrations and noise during braking, to reduce the coefficient of friction, reduce the effectiveness of the braking mechanism. This paper proposes a study regarding the thermal stresses effects of brake mechanism on the disc material of a car Dacia Logan. It proposes a theoretical model to calculate the temperature that occurred during the operation of the braking system and experimental analysis on the influence of temperature on the brake disc material.

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Gradin, Katja Tasala, and Anna Hedlund Åström. "Comparative life cycle assessment of car disc brake systems—case study results and method discussion about comparative LCAs." International Journal of Life Cycle Assessment 25, no. 2 (2019): 350–62. http://dx.doi.org/10.1007/s11367-019-01704-9.

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Abstract Purpose Two life cycle assessment (LCA) studies comparing a new low-particulate-matter-emission disc brake and a reference disc brake were presented. The purpose was to identify the difference in potential environmental impacts due to a material change in the new disc brake parts. Additionally, the validity was investigated for the simplification method of omitting identical parts in comparative LCA. This was done by comparing the results between the simplified and the full LCA model. Methods The two disc brakes, new disc brake and reference disc brake, were assessed according to the LCA ISO standards. The ReCiPe 2016 Midpoint (hierarchist) impact assessment method was chosen. Simplifying a comparative LCA is possible, all identical parts can be omitted, and only the ones that differ need to be assessed. In this paper, this simplification was called comparative LCA with an omission of identical parts. Results and discussion The comparative impacts were analysed over seventeen impact categories. The new disc brake alternative used more resources during the manufacture of one disc compared to the reference disc brake alternative. The shorter life length of the reference disc demanded a higher number of spare part discs to fulfil the same functional unit, but this impact was reduced due to material recycling. The new disc brake impacts were connected primarily to the coating and secondly to the pad manufacture and materials. The validity of the simplification method was investigated by comparing the results of the two LCA models. The impact differences were identical independent of the LCA model, and the same significant impact categories could be identified. Hence, the purpose of the study could be fulfilled, and the simplification was valid. Conclusions Both LCA models, simplified and full, revealed that the new disc brake had limited environmental advantages. The omission of identical parts made it more challenging to determine if an impact was significant or insignificant. The simplification seemed to be reasonable.

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Seelam, Anil Babu, Nabil Ahmed Zakir Hussain, and Sachidananda Hassan Krishanmurthy. "Design and analysis of disc brake system in high speed vehicles." International Journal for Simulation and Multidisciplinary Design Optimization 12 (2021): 19. http://dx.doi.org/10.1051/smdo/2021019.

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Brakes are the most important component of any automobile. Brakes provide the ability to reduce or bring automobile to a complete stop. The process of braking is usually achieved by applying pressure to the brake discs. The main objective of this research paper is to propose an appropriate design and to perform analysis of a suitable brake rotor to enhance the performance of the high-speed car. The design of the brake disc is modelled using Solid works and the analysis is carried out using Ansys software. The analysis has been conducted by considering stainless steel and grey cast iron using same brake rotor design so that optimal choice of brake disc can be considered. The analysis considered involves static structural analysis and steady state thermal analysis considering specific parameters on brake rotor to increase the life of brake rotor. From the analysis it is found that the performance and life of disc brake depends upon heat dissipation. From the analysis results it can be concluded that grey cast iron has performed better as compared to stainless steel as this material has anti-fade properties which improves the life of the brake rotor.

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Aranke, Omkar, Wael Algenaid, Samuel Awe, and Shrikant Joshi. "Coatings for Automotive Gray Cast Iron Brake Discs: A Review." Coatings 9, no. 9 (2019): 552. http://dx.doi.org/10.3390/coatings9090552.

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Gray cast iron (GCI) is a popular automotive brake disc material by virtue of its high melting point as well as excellent heat storage and damping capability. GCI is also attractive because of its good castability and machinability, combined with its cost-effectiveness. Although several lightweight alloys have been explored as alternatives in an attempt to achieve weight reduction, their widespread use has been limited by low melting point and high inherent costs. Therefore, GCI is still the preferred material for brake discs due to its robust performance. However, poor corrosion resistance and excessive wear of brake disc material during service continue to be areas of concern, with the latter leading to brake emissions in the form of dust and particulate matter that have adverse effects on human health. With the exhaust emission norms becoming increasingly stringent, it is important to address the problem of brake disc wear without compromising the braking performance of the material. Surface treatment of GCI brake discs in the form of a suitable coating represents a promising solution to this problem. This paper reviews the different coating technologies and materials that have been traditionally used and examines the prospects of some emergent thermal spray technologies, along with the industrial implications of adopting them for brake disc applications.

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Newase, Srushti. "Thermal Analysis of Disc Brake System." International Journal for Research in Applied Science and Engineering Technology 9, no. 8 (2021): 1819–26. http://dx.doi.org/10.22214/ijraset.2021.37662.

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Abstract: Brakes are one of the most significant safety systems in an automobile. In the braking process, the rotor will be exposed to large stresses which result in surface cracking, overheating of brake fluid, seals and other components. Therefore one of the main tasks of the braking system is to reduce the surface temperature of the brake rotor. This can be achieved by choosing the right material which will undergo the least thermal stresses. In this project, thermal analysis for vented disc brake rotor of Mahindra Bolero’s done, for providing an efficient material for disc brake rotor and brake pads which can dissipate heat generated during braking at faster rate and also being structurally safe. Keywords: Braking system, Disc Brake Rotor, Thermal, Structural Analysis, CATIA V5, ANSYS WORKBENCH

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Kim, Jeong Guk, Sung Tae Kwon, and Sung Cheol Yoon. "Analysis of Hot Spots Evolution on Brake Disc Using High-Speed Infrared Camera." Key Engineering Materials 417-418 (October 2009): 317–20. http://dx.doi.org/10.4028/www.scientific.net/kem.417-418.317.

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The hot spot generation has been considered as the main degradation mechanism in railway brake disc. Therefore, the understanding of hot spots, also called hot judder, which is undesirable low frequency vibrations developed by non-uniform contact area between brake pad material and brake disc, is important for a better understanding of material design as well as enhancement of materials properties in railway brake disc. Also, infrared (IR) thermography is a powerful NDE technique for the characterization of thermal phenomenon in engineering components and/or systems including engineering materials. The high-speed IR camera provides the measurement of temperature change during brake operation as well as the images of temperature contour on the brake disc surface. In this investigation, damage evolution due to generation of hot spots on railway brake disc was investigated using the infrared thermography method. Moreover, based on obtained thermographic images of hot spots, the hot spots and thermal damage of railway brake disc during braking operation were qualitatively analyzed.

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A.Pavan Kumar and Dr.D Venkata Rao, Shaik Chand Mabhu Subhani. "Structural and Thermal Analysis of Brake Drum." International Journal for Modern Trends in Science and Technology 6, no. 12 (2020): 8–15. http://dx.doi.org/10.46501/ijmtst061202.

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The brake drum is a specialized brake that uses the concept of friction to decelerate or to stop the vehicle. The deceleration is achieved by the assistance of the friction generated by a set of brake shoes or pads. During the brake operation heat is ejected out this causes damage to the brake. Disc (Rotor) brakes are exposed to large thermal stresses during routine braking and extraordinary thermal stresses during hard braking. To satisfy this condition the drum material should possess a high thermal conductivity, thermal capacity and high strength .The common material used for construction of brake drum is cast iron. The aim of the project is to design, model a disc. Modeling is done using catia. Structural and Thermal analysis is to be done on the drum brakes using four materials Stainless Steel, gray Cast iron, carbon carbon composite & aluminum metal matrix. The shoes of this kind of brake are contained within the drum and expand outwards when the brake is applied. Such kind of brakes is used in medium heavy-duty vehicles. Structural analysis is done on the drum brake to validate the strength of the drum brake and thermal analysis is done to analyze the thermal properties. Comparison can be done for deformation; stresses, temperature etc. form the three materials to check which material is best. Catia is a 3d modeling software widely used in the design process. ANSYS is general-purpose finite element analysis (FEA) software package. Finite Element Analysis is a numerical method of deconstructing a complex system into very small pieces (of user-designated size) called elements.

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Elhafid, Muhammad Mushlih, Didik Djoko Susilo, and Purwadi Joko Widodo. "Pengaruh bahan kampas rem terhadap respon getaran pada sistem rem cakram." Jurnal Teknik Mesin Indonesia 12, no. 1 (2017): 1. http://dx.doi.org/10.36289/jtmi.v12i1.28.

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This study aims to determine the effect of brake pads material to the vibration response of disc brake system on many variety of braking conditions. The variations of brake pads material on this research such as metallic, non-asbes and ceramic. The variations of braking operation such as speed of disc rotation and braking pressure. Each brake pads material tested by variation of disc rotation 425, 637, 850, 1062 rpm and pressure variation 0,5 bar, 1 bar, 1,5 bar. Furthermore, the dynamic characteristics of brake pad had been tested by using the method of Modal Analysis Experiment. The results showed that the type of brake pad materials, disc rotation and braking pressure affect to vibration response of disc brake system. Increasing speed of disc rotation and braking pressure will increase the excitation force causing value amplitude of vibration in the braking system increases. Usage of brake pad ceramic also showed the lowest amplitude of vibration for all variations of disc rotation and braking pressure. Because the ceramic brake pad have the lowest natural frequency, then the value of the damping ratio is high, so that decreasing amplitude of vibration that occurs in the braking system.

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Dissertations / Theses on the topic "Disc brake material"

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Hussain, Jafar. "Thermal and material characterisation of coated lightweight disc brake rotor." Thesis, University of Leeds, 2018. http://etheses.whiterose.ac.uk/21609/.

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Environmental concerns linked to CO2 emissions have placed the automotive industry under considerable pressure to reduce the carbon footprint of the vehicles that they produce. One way forward involves the use of alternative lightweight materials. The use of aluminium alloy in a brake rotor has the potential to save around 20kg in unsprung mass on a medium sized passenger car. A full scale prototype lightweight coated ventilated aluminium alloy (6082) brake rotor was manufactured to investigate the thermal performance under drag brake test conditions. The brake rotor’s rubbing surface was coated with alumina layer using a plasma electrolytic oxidation (PEO) process. The ventilated brake rotor geometry contributes to the ability of the structure to dissipate heat through the inclusion of an array of appropriately configured vents and so has further bearing on the ability of the rotor to run cool. It is also feasible to explore the impact of vane design on the cooling of the rotor since the vented section of the rotor can be easily reconfigured using the current prototype. Experiments were conducted using a brake dynamometer. Brake rotor rubbing surface temperature, hydraulic pressure, rotational speed and brake torque were monitored during the test. The coefficient of friction was found to be around 0.5. Abaqus software was used to generate a three dimensional finite element model of a section of the coated brake rotor. The simulation results were found to be in good agreement with the experimental results when a heat transfer coefficient of 30 W/m2K was specified on all free surfaces. It was shown that coating thickness has a minimum effect on the substrate temperature. In parallel, a wear analysis has also been carried out using a pin-on-disc experimental setup. The mass of the friction material and the small discs were measured before and after the test. The wear coefficient for both conventional grey cast iron (GCI) and coated aluminium alloy were also measured and compared. It was found that wear rate of the PEO coated disc is about 15 times lower than the GCI. The wear rate of the friction material when run against the PEO coating was about 5 times less than when the same material was run against cast iron, even though the friction coefficient was on average higher (0.6 of 0.5).

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Leigh, Benjamin David. "Strength degradation of carbon-carbon composites for aircraft brakes." Thesis, University of Bath, 1999. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.285332.

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Naidoo, Ramasami Davis. "Influence of friction material & test sequence on disc brake squeal." Thesis, Lille 1, 2014. http://www.theses.fr/2014LIL10169/document.

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Dans l'industrie automobile, le bruit reste un problème majeur. Le crissement de frein est un bruit moyenne-haute fréquence renforcée par les vibrations du système et par un couplage de modes instable entre les composants. On suppose également que les propriétés du contact entre la plaquette et le disque jouent un rôle. Le but de ce travail est de lier l'apparition du crissement avec les transformations du matériau de friction et de son profil. Trois formulations de matériaux simplifiées sont testées. Ces formulations sont comparées à une plaquette de frein commerciale. Une forte hétérogénéité des propriétés mécaniques et thermiques est constatée. Des essais de bruit sont exécutés sur des systèmes de freins pour comparer les formulations. On note une forte influence de la formulation, de la température et de l'historique de freinage sur les occurrences de crissement. Des essais sur banc ont été réalisés à différents états de frottement: vierge, avant et après une charge thermique élevée, etc. L'originalité de ce travail est d'étudier l'évolution du matériau de friction avec la séquence de freinage et en particulier ses propriétés mécaniques et ses hétérogénéités. Ces propriétés sont considérées à la surface et dans le volume via des tests d'indentation. Il est montré que l'évolution des propriétés est liée à des seuils de dégradation du matériau avec la température atteinte au cours de la séquence de test. L'hétérogénéité et la distribution des propriétés de contact et de volume, implémentés dans le modèle numérique d'un système de freinage simplifié pour analyser la stabilité dynamique, semblent avoir un rôle important dans la stabilité du système<br>In the automotive industry, noise is a major problem. Brake squeal is a medium-high frequency noise reinforced by system vibrations and mode lock-in between components. It is assumed the contact properties the pad and the disc play an important role. The aim of this work is to link squeal occurrence with transformations of friction material and profile. Three simplified friction material formulations were tested. These formulations are compared with a commercial brake pad. Significant heterogeneity is observed regarding mechanical and thermal properties. Noise tests are performed on brake systems to compare formulations. A strong influence of formulation, temperature and braking history is observed on squeal occurrence. Following these acoustic tests, additional tests were stopped at different states of friction: at virgin state, before and after a high thermal load, in silent or noisy conditions. The originality of this work is to consider the evolution of the friction material with braking sequence and especially its mechanical properties and their heterogeneities. These properties are separated in two levels: at the surface and onto the volume via indentation tests. It is shown the evolution of the properties is linked to thresholds of material degradation with temperature reached during the test sequence. The heterogeneity and distribution of the volume and contact properties of the material, implemented in a finite element simplified braking system to analyse the dynamic stability, appears to have a significant role in the system stability

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Yuen, Dick Kwan Kenneth. "Brake disc life prediction for material evaluation and selection : the application of finite element and fatigue analysis to the prediction of crack initiation in brake discs during operation." Thesis, University of Bradford, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.363977.

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Wang, Yuan. "Friction surface development and its structure on carbon fibre reinforced silicon carbide disc." Thesis, Loughborough University, 2011. https://dspace.lboro.ac.uk/2134/10003.

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Carbon fibre reinforced ceramic composites (Cf/C-SiC) have been explored as lightweight and durable disc in a friction brake. This composite was manufactured through infiltration of liquid silicon into a Cf/C perform. It has heterogeneous microstructure, composed of three key phases, silicon carbide, Cf/C, and un-reacted residual silicon. The development of the transfer layer on the friction surface of Cf/C-SiC was studied through microstructural image registration of the surface after a range of braking stops on a laboratory-scale dynamometer test rig. When an organic pad was used as the counter face brake pad, it was found that a steady transfer layer was developed in silicon regions right after initial stops; in carbon-fibre/carbon (Cf/C) regions and most of the silicon carbide region, the friction surfaces were unsteady and any possible friction transfer layers were hardly built up. Large voids and cracks/crevices likely became pools to quickly and efficiently collect the transferred materials generated by the friction, but the compacts formed inside the pools were susceptible to be stripped off by further braking operation. Three types of friction surfaces were generalized: type I, the friction transfer layer had a steady relationship with the matrix and respectable longevity; type II, the transfer layer had an unstable relationship with the matrix and poor durability; type III, the friction transfer layer had a steady relationship with the matrix but short lifetime. After testing against organic pads under the laboratory scale dynamometer testing condition, the friction surface of each key phase in Cf/C-SiC composites disc was studied by transmission electron microscopy (TEM). It was found that the transfer layer developed on Si consists of fine particles of metal silicides, silicates and minerals. The substrate damage of Si was not observed, while the precipitates having high oxygen content were found in the substrate. Formation of an interfacial bonding between transfer layer and silicon substrate is believed to be the key factor for the formation of a stable transfer layer on Si. However, the interfacial bonding between transferred materials and SiC was not detected. Kinks are common features developed on the friction surface of SiC. The interface between carbon fibre and carbon matrix was experienced mechanical damage, in form of microcracks, and the transferred material was developed in the interface. Instead of transfer layer, a thin amorphous film, produced by friction induced amorphisation of carbon fibre, was developed on top of carbon fibre.

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Leonardi, Mara. "Development of novel eco-friendly friction materials for disc brake systems." Doctoral thesis, Università degli studi di Trento, 2020. http://hdl.handle.net/11572/255825.

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Due to new environmental regulations, the demand for brake systems producing low polluting emissions and keeping high performance, is increasing. Therefore, a reduction in the toxic substances contained in brake friction materials is required that still meets all applicable safety standards and retaining properties such as low wear, high temperatures resistance, friction coefficient stability and consistency. Among the various ingredients used in formulations, copper has recently become the subject of different regulations on brake pad materials and will be reduced, or even prohibited, in the coming years. Recent studies have found that brake pads are major contributors to the deposit of copper in rivers and lakes, and this has a toxic impact on the environment. This metal is currently added in brake material formulations because of its good physical properties and its contribution to the formation of a uniform and stable friction layer. Its characteristics make it a constituent that is not easy to replace and an adequate substitute covering all the roles of copper has not been found as yet. The present research aims at developing, producing and testing new formulations for brake pads without copper. A relatively wide range of friction materials was investigated, in order to understand the role that selected constituents have in friction and wear behaviour. In the first place, an investigation on the role of copper in friction materials was performed. The study was followed by the selection of a suitable replacement for this constituent in the formulation. To do so, different friction components were studied. Additionally, other aspects relating to friction materials, such as the deterioration of the binder, were subject of investigation. The novel formulations, produced starting from commercially available compositions, were ranked in terms of wear and friction behaviour by means of a pin-on-disc tribometer. Cylindrical specimens were produced directly from powders, so that constituents could be easily modified based on the test outcome. This is a very effective method to study the role of individual constituents in the mixture, considering the relatively small amount of each specific composition to be prepared and the ease of processing it. In order to identify the principal wear mechanisms and their dependence on material properties and test conditions, the worn materials were analysed via scanning electron microscopy (SEM) techniques and Energy Dispersive X-Ray Spectroscopy (EDXS). Part of the acquired knowledge from the first part of the work was used in the initial stages of the ECOPADS project (the project started during the doctoral period) to develop and manufacture real brake pads that were tested on brake dynamometers and evaluated in terms of both performance and emissions.

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Aleksandar, Poznić. "Povećanje ukupnog kočnog momenta magnetoreološke disk kočnice primenom kombinovanog režima rada." Phd thesis, Univerzitet u Novom Sadu, Fakultet tehničkih nauka u Novom Sadu, 2017. https://www.cris.uns.ac.rs/record.jsf?recordId=104395&source=NDLTD&language=en.

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U doktorskoj disertaciji razmatra se unapređenje konstrukcije magnetoreolo&scaron;ke disk kočnice sa ciljem povećanja vrednosti ukupnog kočnog momenta. Radi potpunog razumevanja međusobnog odnosa materijala i magnetskog polja na prvom mestu je izvr&scaron;eno utvrđivanje magnetskih svojstava materijala. Unapređenje konstrukcije je izvr&scaron;eno kroz vi&scaron;e iteracija i prototipova. Merenje vrednosti ukupnog kočnog momenta je podeljeno na merenje vi&scaron;e njegovih komponenti pri različitim vrednostima broja obrtaja i upravljačke struje namotaja.<br>In this thesis magnetorheological disk brake construction improvement is considered, with the goal to increase the overall braking torque value. For purposes of better understanding of material to magnetic field relationship, series of magnetic field testing were conducted. Construction improvement has been carried out through several iterations and different prototypes. Overall braking torque value measurements have been divided into several component measurements, utilizing different rotational speeds and coil control currents.

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Drabison, John Stephen II. "Experimental Investigation of Judder in a Floating Disc-Caliper Braking System with Focus on Pad Geometry." The Ohio State University, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=osu1276795212.

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Matozo, Luciano Tedesco. "Estudo da relação entre propriedades de compósitos de fricção aplicados a sistemas de freio a disco e a propensão à ocorrência de Squeal Noise." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2012. http://hdl.handle.net/10183/61378.

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Sistemas de freio automotivos são frequentemente suscetíveis a gerarem ruídos de alta frequência como resultado de uma vibração autoexcitada. Este fenômeno é genericamente nominado squeal noise e constitui o tema de diversos estudos publicados com o intuito de identificar e descrever seu mecanismo de excitação e de propor alternativas para evitar sua ocorrência. Um ponto fundamental que ainda não foi completamente explorado sobre a geração de tal fenômeno constitui-se da relação entre as propriedades do material de fricção e a propensão à ocorrência de squeal noise. Este trabalho apresenta o desenvolvimento de um número adimensional obtido através de análise dimensional (teorema de Buckingham) capaz de relacionar a ocorrência de squeal noise as quatro principais propriedades dos compósitos de fricção: dureza, tamanho de partícula e concentração do abrasivo utilizado na formulação, além de sua compressibilidade. Resultados experimentais foram obtidos a partir de ensaios desenvolvidos com seis diferentes materiais de fricção nos quais a concentração ou dureza ou tamanho de partícula foi alterada de modo a oportunizar a identificação do impacto destas variáveis sobre a ocorrência de squeal noise. A ocorrência de ruídos foi verificada através da aplicação de um método de ensaio em dinamômetro inercial especialmente desenvolvido a um conjunto de amostras dos materiais de fricção moldados a pastilhas de freio e aplicados a um sistema de freio a disco convencional. Os resultados obtidos validaram o número adimensional proposto (índice de excitação 2) na medida em que foi possível estabelecer sua relação com a ocorrência de ruídos verificada experimentalmente através de uma equação logarítmica (R²=0,9). Foi estabelecida também uma relação entre o aumento do coeficiente de atrito, em função da redução da velocidade de escorregamento, e o aumento da ocorrência de squeals. Uma breve investigação a respeito da relevância da rigidez de contato sobre o comportamento vibroacústico do sistema de freio também é conduzida, tendo sido demonstrado que o aumento da magnitude desta propriedade reduz a ocorrência de ruídos do tipo squeal.<br>Automotive brake systems are very often susceptible to generate high frequency noise as a result of a self excited vibration. This phenomenon is generically nominated brake squeal noise and is the subject of many studies which intend to identify and describe its exciting mechanism and to propose counter measures to avoid its occurrence. One key subject yet to be explored about squeal noise generation is the relation between friction material properties and its occurrence propensity. This work presents the development of an adimentional number obtained by dimensional analysis (Buckingham theorem) capable to relate the squeal noise occurrence with four main properties from the friction composite: abrasive hardness, particle size and concentration and also its compressibility. Experimental results were obtained by testing six different friction material formulations, in which the concentration of abrasive or its hardness or its particle size was altered in order to explore the impact of these variables on the squeal noise occurrence. The noise generation was accessed by testing the friction materials molded to brake pads using a standard disc brake system in an inertial dynamometer under a specially developed test procedure. The obtained results validated the proposed adimentional number (excitation index 2) since was possible to establish a logarithmic equation (R²=0,9) relating it to the squeal noise occurrence verified on the conduced tests. It was also established a relation between the friction coefficient increase, as a function of the sliding speed reduction, with the increase on squeal noise occurrence. A brief investigation about the relevance of the contact stiffness to the vibroacustic behavior of the brake systems was developed, showing that higher values of this property can reduce the squeal noise generation.

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Books on the topic "Disc brake material"

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C, Barton David, and Institution of Mechanical Engineers (Great Britain), eds. Advances in automotive braking technology: Design analysis and materials development. Mechanical Engineering Pub., Ltd., 1996.

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C, Barton David, ed. Advances in automotive braking technology: Design analysis and materials developments. Mechanical Engineering Publications, 1996.

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Barton, David C. Advances in Automotive Braking Technology: Design Analysis and Materials Developments. Society of Automotive Engineers Inc, 1997.

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Book chapters on the topic "Disc brake material"

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Chauhan, Manish Kumar, Animesh Garg, Aditya Syal, and Manmeet Singh. "Testing of Material for Disc Brake Rotor." In Advances in Engineering Materials. Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-33-6029-7_37.

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Cherrez, Mario, Javier Martìnez-Gomez, Juan Francisco Nicolalde, and Augusto Riofrio. "Material Selection Based on Multicrieria Decision Methods for Brake Disc Manufacture." In Innovation and Research. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-030-60467-7_35.

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Degallaix, Gérard, Philippe Dufrénoy, Jonathan Wong, Paul Wicker, and Frédéric Bumbieler. "Failure Mechanisms of TGV Brake Discs." In The Mechanical Behavior of Materials X. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-440-5.697.

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Hwang, Jung Ho, Heung Seob Kim, Young Choi, Byeong Soo Kim, and Ki Weon Kang. "The Thermal Analysis of Brake Disc with 3-D Coupled Analysis." In Key Engineering Materials. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-978-4.305.

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Chheda, Aman Dharmendra, and Ravikant Hattale. "Selection of Materials for Manufacturing of Disc Brake Rotor for a Racing Go-Kart Having Single Hydraulic Disc Brake System." In Proceedings of International Conference on Intelligent Manufacturing and Automation. Springer Singapore, 2020. http://dx.doi.org/10.1007/978-981-15-4485-9_45.

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Ouyang, Qiu Bao, Wen Long Wang, Di Zhang, and Guo Ding Zhang. "Discontinuously Reinforced Aluminum Composite and Its Application in Brake Discs." In Key Engineering Materials. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-997-0.31.

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Wang, X. H., S. W. Zhang, D. G. Wang, and N. Wu. "Research on Worn Mechanism of Disc-Brake Pair Materials for Drilling Rig." In Advanced Tribology. Springer Berlin Heidelberg, 2009. http://dx.doi.org/10.1007/978-3-642-03653-8_106.

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Sokolska, Justyna, and Piotr Sokolski. "Thermal Evaluation of Operation of Disc Brakes Made of Selected Materials." In Lecture Notes in Mechanical Engineering. Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04975-1_79.

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Cho, Sung Keun, Jung Hun Choi, Young Min Lee, and Chang Sung Seok. "Life Evaluation of a Disk Brake of Railway Vehicles Considering Pressure Distributions at a Frictional Surface." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-456-1.303.

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Yu, Liang, YanLi Jiang, Senkai Lu, Kun Luo, and HongQiang Ru. "Numerical Simulation of Brake Discs of CRH3 High-Speed Trains Based on Ansys." In Proceedings of the 1st World Congress on Integrated Computational Materials Engineering (ICME). John Wiley & Sons, Inc., 2011. http://dx.doi.org/10.1002/9781118147726.ch25.

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Conference papers on the topic "Disc brake material"

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Polak, Adam, Janusz Grzybek, Stanisław Pytko, and Kirill Voynov. "Reuse of Wear Debris in Automotive Disc Brakes." In World Tribology Congress III. ASMEDC, 2005. http://dx.doi.org/10.1115/wtc2005-63346.

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Paper presents an idea of wear debris reuse in the automotive disc brakes. According to this idea, worn material is used as a material building up third body. Application of this idea leads to diminishing of brake discs and brake pads wear.

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Kosbe, P., and C. More. "Performance of a disc brake friction material." In International Conference on Frontiers in Automobile and Mechanical Engineering (FAME 2010). IEEE, 2010. http://dx.doi.org/10.1109/fame.2010.5714867.

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Saheb, Shaik Himam. "Design and structural analysis of brake disc by varying brake pressure." In INTERNATIONAL CONFERENCE ON TRENDS IN MATERIAL SCIENCE AND INVENTIVE MATERIALS: ICTMIM 2020. AIP Publishing, 2020. http://dx.doi.org/10.1063/5.0015678.

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Mace, Gael, Nicholas Bowler, Geoff Goddard, and Denise Morrey. "Characterisation of Material Transformation during Cast Iron Brake Disc Bedding." In 24th Annual Brake Colloquium and Exhibition. SAE International, 2006. http://dx.doi.org/10.4271/2006-01-3185.

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Okamura, Toshikazu, and Masanori Imasaki. "A Study on Relationship Between Disc Thickness Variation and Casting Material Properties." In 21st Annual Brake Colloquium & Exhibition. SAE International, 2003. http://dx.doi.org/10.4271/2003-01-3347.

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Yu, Zhizhuang, and Yong Wang. "Exploration of Enhanced Heat Dissipation Design for Brake Disc of High Speed Train." In ASME 2010 Rail Transportation Division Fall Technical Conference. ASMEDC, 2010. http://dx.doi.org/10.1115/rtdf2010-42007.

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The function of the brake disc is to provide the ultimate guarantee of the safety of high speed trains. A braking unit includes two discs and two brake shoes. Braking performance depends on the pressure of the brake shoe and the friction between the disc and the shoe. When a train is braked, the brake disc endures a thermal load, which may affect the mechanical properties of the disc. If the thermal load exceeds the strength limit of the material, it could impact the safe running of the train. Therefore, the thermal load should be reduced as much as possible. Now the frictional surface of disc is plane and heat congregates easily in the surface area. The purpose of this paper is to explore a design for enhanced heat dissipation. A gas channel was used on the frictional surface to achieve the effect of heat dissipation. This design was analyzed by means of tribology and heat transfer theory. The distribution of gas flow was also researched. The temperature and stress field of the disc were simulated and analyzed. By the analysis it can be seen that the gas channel on the frictional surface of disc has a remarkable effect on heat dissipation in the brake disc.

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Rahman, AHM E., and David Pugh. "Design of a Composite Mountain Bike Hydraulic Disc Brake." In ASME 2019 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/imece2019-11057.

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Abstract The primary goal of the project is to design a hydraulic disk brake system for mountain bikes made from reinforced plastics. Hydraulic brakes offer significantly better performance for a mountain bike over traditional cable rim break or cable disk break. Nevertheless, people are unable to appreciate advantage because of the price. The traditional hydraulic disk brake systems are made of aluminum alloy. With a proper design, it may be possible to create a lever assembly and a caliper that would be competitive on price and weight. Often bike parts are judged by how much they weight, the less they weight, the more they are desirable. This is only true to a certain extent because lighter parts come with a premium price tag. The current project proposed that the injection molded brakes would be lighter because of the material being used and cost-effective because the manufacturing process can be utilized. Commercial reinforced plastic composites have been identified as lighter materials compared to aluminum alloy. Through an iterative design process, the final designs of lever assembly and caliper have been achieved. The stopping force has been determined considering the abrupt stoppage with a standard weight person riding the bike. Based on the stopping force the stress analyses were obtained using FEA simulation for master cylinder, slave cylinder, and lever. At the end, the final designs were chosen based on the stress analyses and manufacturability.

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Anjikar, Prof A. D. "General Idea About Different Material Of Disc Brake For Desiging Automobiles." In International Conference on Science and Engineering for Sustainable Development. Infogain Publication, 2017. http://dx.doi.org/10.24001/ijcmes.icsesd2017.43.

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Kosbe, Pradnya Eknath, Niteen Sahasrabudhe, Rahul Khandagale, and Rajendra Kulkarni. "Performance of Non Asbestos Disc Brake Friction Material for Automotive Application - An Experimental Case Study." In SAE 2010 Annual Brake Colloquium And Engineering Display. SAE International, 2010. http://dx.doi.org/10.4271/2010-01-1678.

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Chowdhary, Harsh V., Anil K. Bajaj, and Charles M. Krousgrill. "An Analytical Approach to Model Disc Brake System for Squeal Prediction." In ASME 2001 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2001. http://dx.doi.org/10.1115/detc2001/vib-21560.

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Abstract The squeal noise arising due to friction-induced vibrations in brakes continues to be a major challenge for automotive manufacturers. To predict one of the mechanisms behind disc brake squeal, an analytical model is developed for the disc brake system. The brake rotor is represented by a thin plate of equivalent modal characteristics and the backing plates are modeled as thin annular sector plates using Rayleigh-Ritz approach. The two structural models are then coupled using linear elastic springs and Coulomb friction at the interface, and Lagrangian approach is used to derive the equations of motion of the coupled system. The resulting linear equations are solved by using complex eigenvalue analysis. The study shows that squeal is a flutter-type instability caused by coupling between the modes of structural components with very close natural frequencies. The sensitivity to friction material stiffness and the influence of hydraulic cylinder stiffness at backing plates are also discussed.

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Reports on the topic "Disc brake material"

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Blau, Peter Julian. Prospects for Titanium-Based Materials as Truck Disc Brake Rotors. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/1081592.

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