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1
Wadile, Ratnajeet. "Thermal Analysis of a Disc". International Journal for Research in Applied Science and Engineering Technology 9, nr 10 (31.10.2021): 1910–15. http://dx.doi.org/10.22214/ijraset.2021.38476.
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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.
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Poznić, A., i B. Stojić. "Numerical simulation of an electromechanical brake concerning associated difficulties". IOP Conference Series: Materials Science and Engineering 1271, nr 1 (1.12.2022): 012027. http://dx.doi.org/10.1088/1757-899x/1271/1/012027.
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Abstract The biggest challenge in developing any type of brake (or any other actuator) is overcoming its inherent disadvantages. Brakes that use materials whose rheological properties change under the influence of an external magnetic field are called magnetorheological brakes. In addition to the mechanical issues, magnetorheological brakes are troubled with cooling, sealing, settling, fluids' gap size, etc. Furthermore, there are issues with brake’s magnetic field density distribution and propagation. The poor distribution of the magnetic field density through the body of the magnetorheological brake is one of these inherent disadvantages. Magnetorheological’s brake magnetic circuit modeling forms the basis for further development. This paper is part of ongoing research into the feasibility of using magnetorheological brakes in automotive applications. Certain points of the numerical simulation process are addressed. The research uses part of the results from previous numerical simulations, carried out using commercial finite element method software - COMSOL Multiphysics, AC/DC module, and results from the previous experiments.
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Sawczuk, Wojciech, Armando Miguel Rilo Cañás, Dariusz Ulbrich i Jakub Kowalczyk. "Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests". Materials 14, nr 16 (23.08.2021): 4766. http://dx.doi.org/10.3390/ma14164766.
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This article presents the results of tests conducted on the average and instantaneous friction coefficients of railway vehicle disc brakes. The tests were carried out independently of various states of wear on the friction linings and the brake disc. The requirements of the International Union of Railways (UIC) regarding the approval of brake linings for use were taken into account. Based on many years of research using a brake bench to test railway disc brakes, the authors developed multiple regression models for the average friction coefficient and fluctuations (tolerances) in the instantaneous friction coefficient and achieved 870 results. The models proposed three types of variables: the input braking parameters (speed, pressure, and mass to be braked), operational parameters (the wear on the friction linings and the brake disc), and design parameters (perforations in the form of holes on the disc surface). The above two models were validated on the basis of 384 brakes, and in subsequent stages a further evaluation was performed. The coefficients were determined to be, respectively, 0.99 for the model of the average friction coefficient and 0.71 for the model of tolerance (fluctuations) of the instantaneous friction coefficient.
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Li, Ai Ran, Yu Jin Fan, Teng Han, Zhe Kun Li, Pei Lin Zhao i Jun Jie Wang. "Properties of Hydraulic Floating Caliper Brake for AGV Car". Applied Mechanics and Materials 644-650 (wrzesień 2014): 33–36. http://dx.doi.org/10.4028/www.scientific.net/amm.644-650.33.
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Existing AGV car’s brakes are electromagnet brakes. Brake overheating causes brake damaged during work time.In this paper ,the hydraulic pressure floating caliper brake is applied to the AGV car . It with electromagnetic brake AGV car for braking performance comparison test, through comparative analysis know that hydraulic floating caliper brakes can not only meet the AGV car’s braking requirements and the system dynamic performance has improved greatly.
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Reddy, R. Vishnu Vardhan. "Modeling and Analysis of Functionally Graded Material for Disc Plate under Mechanical Loads". International Journal for Research in Applied Science and Engineering Technology 11, nr 7 (31.07.2023): 386–94. http://dx.doi.org/10.22214/ijraset.2023.54619.
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Abstract: The most crucial components of an automobile are the brakes. The wheel's rotation can be controlled and stopped by using the brakes. Today's cars employ a variety of brakes, with disc brakes being one of the most common. Brake pads are used in disc brakes to exert force against the disc's two sides mechanically, hydraulically, pneumatically, or electromagnetically. The attached wheel and disc come to a stop due to friction. Brakes turn friction into heat; if the temperature rises too high, they tend to stop working because they are unable to remove enough heat from the system. Brake fading is the name of this failure state. During normal braking and under extreme thermal stress during hard braking, disc brakes are exposed to significant thermal strains. Mild steel is typically used for disc brakes, which are attached to the wheel. In this work, functionally graded spinning annular discs exposed to internal pressure and varied temperature distributions underwent an analytical investigation. Considered are two disc brake models: one without holes and one with holes. Different materials for disc brakes will be compared; the materials are mild steel and aluminium alloy 6061 with regard to functional graded materials. The two models with different material compositions are subjected to structural and thermal examination. In CATIA V5 R20, a disc brake model is made, and in ANSYS 14.5, analysis is carried out
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Ren, Zhaolin. "The Performance Analysis of Elevator Brake". Journal of Physics: Conference Series 2463, nr 1 (1.03.2023): 012047. http://dx.doi.org/10.1088/1742-6596/2463/1/012047.
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Abstract In order to understand the safety status of traction drive elevator brake, taking the most common drum brake as the research object, several common failure forms of drum brake and the problems found in brake disassembly are summarized and sorted out. Based on the analysis of failure causes, suggestions on the use and maintenance of elevator brakes are put forward, and the in-service elevator brakes which have been used for a certain period of time are tested, and the performance characteristics of the in-service elevator brakes are analyzed, which provides a basis for the promotion of hidden trouble investigation and rectification of elevator brakes.
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Bureika, Gintautas, i Šarūnas Mikaliūnas. "RESEARCH ON THE COMPATIBILITY OF THE CALCULATION METHODS OF ROLLING‐STOCK BRAKES". TRANSPORT 23, nr 4 (31.12.2008): 351–55. http://dx.doi.org/10.3846/1648-4142.2008.23.351-355.
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One of the main tasks approached by the European Union is the liberalisation of railway transport service market. The foremost problem solved in this paper is the interoperability of various railway systems in the countries of the European Union. Thus, the immediate goal is to solve the problem of the interoperability of different railway systems used in the European Union. A distinction between railway track gauges (from 1435 to 1668 mm), particular couples of wagons, various clearances of rolling stock, different systems of infrastructure etc. are the main impediments. One of the problems in the nearest future will be the evaluation of the brakes of different wagons produced in Western Europe and the former Soviet Union. Freight trains in Lithuania consist of these two types of wagons, and therefore some problems of correcting the results of calculating braking distances and brake force may arise. The main object of this research is to investigate the methods evaluating the brakes of rolling‐stock and to assess the possibilities of integrating and harmonizing these different methods. The reliability of the methods evaluating the brakes of rolling‐stock is one of the most important components enabling the interoperability of railway transport in the EU network. The brakes of Russian wagons are calculated by MPS Rules for Traction Calculations, approved by the Russian Ministry of Transport (till 2004 ‐ Ministry of Communication Ways of Russia)). On the other hand, the brakes of the wagons produced in Western Europe should be calculated applying TSI (Technical Specifications for Interoperability) methodology. The main parameter following TSI (Technical Specifications for Interoperability) methodology is braked mass and following MPS (Railway Transport Ministry of Russia) method ‐ a pressing force of the brake shoes. The questions of determining the braked mass of wagons and correcting mean braking distance are presented. The compatibility of two different evaluating methods is discussed. Finally, the basic conclusions are given.
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Duraisivam, Sivam, i E. Jamuna. "Thermal Analysis and Fabrication of Split Shoe Drum Brake". Applied Mechanics and Materials 867 (lipiec 2017): 239–44. http://dx.doi.org/10.4028/www.scientific.net/amm.867.239.
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Active control of vehicle dynamics has become one of the top competitive features in today’s automobiles. Vehicle dynamics control systems include effective brakes and the number of life loss has been increased due to the in effective brakes. To reduce the crashing of vehicles caused by the braking disability by overcoming the drawbacks of the conventional braking system.Brakes are employed to stop or slow down the speed of the vehicle depending upon the driving needs. When brake applied, each wheel of the vehicle builds-up a certain braking force. For this reason, greater the number of wheels braked, greater will be the braking effect, and sooner the vehicle comes to halt. With this in mind the existing air brake system of a 6 wheeler is studied and analyzed. Brake shoe assembly is completely modeled using solid works and the analysis of the brake shoe assembly is carried out in Ansys .The results are analyzed . Then redesigned brake shoe assembly is modeled in solid works and analyzed with certain changes as required.
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Mortimer, Rudolf G. "Motorcyclists' Brake Operation, Motorcycle Brake Controls and a Case Study: The Need for Human Factors Engineering". Proceedings of the Human Factors and Ergonomics Society Annual Meeting 46, nr 10 (wrzesień 2002): 890–94. http://dx.doi.org/10.1177/154193120204601003.
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A survey was made of the braking techniques reportedly used by 180 motorcyclists in a variety of conditions. Overall, the motorcyclists indicated that they used both front and rear brakes in hard braking 75% of the time on dry pavement and 47% on wet, but in other conditions they mostly used the rear brake first or exclusively. That the rear brake is preferred is not surprising because of the design of the brake controls and other reasons. Reliance on the rear brake at the expense of the front wheel brake leads to reduced deceleration. A crash case study exemplifies the effect. Integrated brakes, in which each brake control simultaneously activates the brakes on the front and rear wheels, are indicated by good human factors design and by motorcyclist's braking performance and should improve safety, especially when the brakes incorporate anti-locking mechanisms
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Pradhan, Dr Swastik, Santhosh M, Palepu rithvik i Katkam Ravi Teja. "Modelling and analysis of ventilated disc Brakes using Creo and FEA software". International Journal for Research in Applied Science and Engineering Technology 10, nr 6 (30.06.2022): 1359–70. http://dx.doi.org/10.22214/ijraset.2022.43959.
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Abstract: An important part of a car's safety system is the brakes. Brakes are easily worn, leading to unpredictable disasters. To avoid this, ventilated disc brakes are used, which helps the brakes to work well in stressful conditions and high temperatures. The materials used play an important role in determining performance. The main objective of this research work is to analyze the current design and conduct a suitable brake rotor analysis to improve its performance. Existing brake disc designs are modeled in Creo and analyzed with software. The material grades used in this study were performed on stainless steel, grey cast iron, structural steel, and titanium alloy brake discs using the same brake disc design to determine the best grade. Keywords: ventilated disc brake, creo, thermal analysis, static analysis.
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Zuo, Jianyong, Jingxian Ding, Cheng Liu i Zhuojun Luo. "A virtual prototype for performance analysis of electropneumatic brake on metro trains". Advances in Mechanical Engineering 12, nr 6 (czerwiec 2020): 168781402092627. http://dx.doi.org/10.1177/1687814020926275.
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In order to facilitate system design and performance analysis, a virtual prototype for metro train electropneumatic brakes is proposed. A virtual braking environment that consists of a three-car train model and six electropneumatic brakes model is elaborated. The virtual braking environment can be used to research the relation between braking response and electropneumatic brake’s parameters and to simulate axle loading transfer. By comparing the simulation results with bench test data, the electropneumatic brake model is proven to be quite accurate. Based on the proposed virtual prototype, a test train brake is designed, and a couple of field tests are carried out. The average deceleration of electropneumatic compound service brake at the initial speed of 45 km/h is 0.83 m/s2, the braking distance is 94 m, and that of pure air service brake at the speed of 43 km/h is 0.64 m/s2, the braking distance is 111 m. The field test results satisfy the test train requirements, which further proves the effectiveness of the proposed virtual prototype.
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Kristyawan, Yudi, i Muchammad Asro Rofi’i. "Early Detection of Overheating in Motorcycle Disc Brakes Based on Arduino". Inform : Jurnal Ilmiah Bidang Teknologi Informasi dan Komunikasi 6, nr 1 (31.01.2021): 21–27. http://dx.doi.org/10.25139/inform.v6i1.3348.
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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.
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Solovykh, Yevhen, Viktor Dubovyk, Andrii Solovykh, Stanislav Katerynych i Maksym Ishov. "Investigation of the Braking Process of Suspended Wheels of a Car With a Hydraulic Brake Drive". Central Ukrainian Scientific Bulletin. Technical Sciences, nr 3(34) (październik 2020): 282–89. http://dx.doi.org/10.32515/2664-262x.2020.3(34).282-289.
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For diagnosing car braking systems, bench methods have become the most widespread, and on power stands with running drums. The main disadvantage of these methods is the high cost of brake stands with low quality diagnostic information. At the same time the method of diagnosing brake systems on change of angular speed of the hung up wheels is perspective. But the considered method does not have a sufficiently complete theoretical justification, especially for cars with hydraulic brakes and therefore requires research. Therefore, the work substantiates the diagnostic modes and diagnostic parameters, obtained analytical dependences of the process of braking car wheels with hydraulic brakes, which describe the change in the angular deceleration of the suspended wheels over time in different parts of the brake diagram and the delay time of the brake system. The mathematical model is based on the differential equation of motion of the braked wheel when braking a car with a connected transmission (with clutch engaged) on a straight horizontal section of road. The change in braking torque during braking is determined by the nature of the pressure change in the drive. When braking the wheel, the braking force acts on the radius of the brake drum. The obtained analytical dependences make it possible to study the influence of various factors of the technical condition of brake systems on the performance of the braking process. In order to substantiate the diagnostic modes and diagnostic parameters, analytical dependences of the process of braking car wheels with hydraulic brakes have been developed, describing the change of angular deceleration of suspended wheels in time at different parts of the brake diagram and time delay of the brake system. The obtained analytical dependences make it possible to study the influence of various factors of the technical condition of brake systems on the performance of the braking process.
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Kwesi Ampadu, Vincent-Michael, Anas Alrejjal i Khaled Ksaibati. "Performance and cost-effectiveness of air disc brakes and air drum brakes for truck semi-trailers in different road and speed conditions". Journal of Sustainable Development of Transport and Logistics 8, nr 1 (5.05.2023): 24–42. http://dx.doi.org/10.14254/jsdtl.2023.8-1.2.
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This study uses TruckSimTM to model disc brakes and drum brakes on a fully loaded truck semi-trailer to study the performance of each brake type as downgrades and speeds vary. The brake performance is measured based on braking distance. A simplified economic comparison based on life cycle cost analysis to determine which road and vehicle conditions give rise to the cost-effectiveness of disc brakes is performed. The studies suggest that disc brakes shorten braking distances by 10-20%. They also suggest that the percentage reduction in braking distance as speed increases and downgrade gets steeper is approximately 12-19%. Evidence is provided that trucking companies operating their vehicles in steep terrain and at high speeds with disc brakes could benefit from 12-80% in long-term cost savings. Finally, at the societal level, by preventing crashes arising from rear-end collisions and runaway truck incidents, disc brakes save at least $649 million annually.
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Sampathkumar, M., A. Sakthivel, P. Tharun Prasad, S. Vinothkumar i R. Vinothkumar. "Design and fabrication of electromagnetic braking system for four wheeler". South Asian Journal of Engineering and Technology 8, nr 1 (8.02.2019): 1–3. http://dx.doi.org/10.26524/sajet190802.
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These brakes designed by controlling for equipment, automobiles and movers are suitable for AC&DC power supplies up to 12 v to 220 v and are suitable for wide range of drum sizes 10 to 380 mm dia these brakes are suitable with a rated torque ranging from 100kg-cm for the smallest brake up to 2000 kg-cm for a 380mm dia at 50% coil rating, the coil remains in circuit for a maximum 5 min out of every 10min. Since these brakes are closed position, the release of brake shoes is affected by energizing the electromagnetic coil which over comes the spring force and shoes are moved clear of drum by lever system so that the drum is free to rotate without any friction. When the power given to the electromagnetic coil the coil gets energized and in turns the plunger pulls down. The plunger in turn operates the arm of the brake and the brake opens. When specied brake drum both pin bush type and flexible geared type can be supplied along with the brakes.
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Synák, František, Lenka Jakubovičová i Matúš Klačko. "Impact of the Choice of Available Brake Discs and Brake Pads at Different Prices on Selected Vehicle Features". Applied Sciences 12, nr 14 (21.07.2022): 7325. http://dx.doi.org/10.3390/app12147325.
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The purpose of a road vehicle’s friction brakes is to convert a vehicle’s kinetic energy to thermal energy. When doing so, the brakes should not be heated to such temperatures at which their efficiency could be reduced. The objective of the measurements in this article is to assess the ability of passenger brakes’ spare parts, brake discs and brake pads to meet the requirements for brakes. For the experimental measurements, brake discs and brake pads of high, middle and low prices were selected from advertisements intended for a particular vehicle. The measurements were performed via driving test measurements as well as under laboratory conditions. Driving test measurements determined the brake distance and mean fully developed deceleration of the brake components of all three price categories. On the other hand, the dependence between the effort to control the steering and the brake force, as well as the temperature of brake discs during repeated interrupted braking and continuous uninterrupted braking, were determined under laboratory conditions. Attention was also given to prevention against corrosion. The results show a sufficient ability of all the brake pads and brake discs tested to generate braking force under common conditions. However, when using the lowest-priced brake discs and brake pads, a substantial reduction in their efficiency can occur if braking intensively or over a long period.
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Skorupka, Zbigniew. "Efficiency and Fatigue/Endurance Laboratory Tests of Aviation Friction Brakes". Fatigue of Aircraft Structures 2022, nr 14 (1.12.2022): 104–13. http://dx.doi.org/10.2478/fas-2022-0008.
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Abstract Brakes are one of the most important safety systems in moving vehicles and machines. In vehicles such as cars or motorcycles brakes are used for stopping, controlling speed, and sometimes changing direction of travel. In aircraft, the main function of brakes is to reduce landing speed. As landing is one of the most dangerous maneuvers in aircraft operation, brakes must be efficient and reliable in order to ensure safety of the crew, passengers, and cargo. The most efficient brakes nowadays are friction brakes where velocity is controlled by friction of a pair of specially designed materials, which ensure stable and high friction coefficient over the course of the required braking process. The process itself is the dissipation of energy during aircraft movement which generates very high temperatures in friction materials during the time of the braking process. The materials and the whole brakes have to be temperature resistant, and we must ensure braking parameters are stable during the whole process. The same principle relates to the endurance/fatigue of the brake assemblies which must be durable enough to survive as high number of braking cycles as possible without any failure, which can result in fatal consequences. Every friction pair and every newly designed brake assembly must be laboratory tested for efficiency and endurance/fatigue in order to be used in an aircraft or vehicle. In this paper, we present the basic set of laboratory tests in the scope of friction materials and brake assemblies. Results of the tests are used as confirmations/proofs of proper and safe operation of the brakes for use in vehicles, especially in aircraft but also in land-based vehicles.
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Durali, Laaleh, Amir Khajepour i Soo Jeon. "Design and optimization of a cam-actuated electrohydraulic brake system". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 232, nr 7 (3.07.2017): 909–20. http://dx.doi.org/10.1177/0954407017713103.
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Although different types of brake-by-wire mechanism including electrohydraulic brakes, electromechanical brakes, electronic wedge brakes and distributed electrohydraulic brakes have been developed in the past two decades, there is still an increasing demand for further improvement and also for development of new brake mechanisms in the automotive industry because of the escalating requirements for higher safety and better performance. This paper proposes a novel brake-by-wire system based on the cam actuation mechanism. The proposed cam-actuated electrohydraulic brake system is a combination of an electrical component, a mechanical component and a hydraulic component. The unique feature of the proposed cam-actuated electrohydraulic brake system is that the characteristics of the motor torque amplification can be optimized by careful design of the cam shape. The overall structure of the cam-actuated electrohydraulic brake system is described, and the dynamic model of the system is developed. Optimum design of the cam-actuated electrohydraulic brake system is obtained by multi-objective optimization, and the obtained simulation results are discussed. The compactness and the self-contained characteristics of the design enable the brake system to be installed on each wheel, allowing fully independent control of each wheel for better stability control.
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Gräbner, Nils, Dominik Schmid i Utz von Wagner. "On Drum Brake Squeal—Assessment of Damping Measures by Time Series Data Analysis of Dynamometer Tests and Complex Eigenvalue Analyses". Machines 11, nr 12 (24.11.2023): 1048. http://dx.doi.org/10.3390/machines11121048.
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Brake squeal—an audible high-frequency noise phenomenon in the range between 1 kHz and 15 kHz resulting from self-excited vibrations—is one of the main cost drivers while developing brake systems. Increasing damping is often a crucial factor in the context of self-excited vibrations. Countermeasures applied for preventing brake squeal have been investigated particularly for disk brakes in the past. However, in recent years, drum brakes have once again become more important, partly because of the issue of particle emissions. Concerning noise problems, drum brakes have a decisive advantage compared to disk brake systems in that the outer drum surface is freely accessible for applying damping devices. This paper focuses on the fundamental proving and evaluation of passive damping measures on a simplex drum brake system. To obtain a detailed understanding of the influence of additional damping on the squealing behavior of drum brakes, extensive experimental investigations are performed on a brake with an intentionally introduced high squealing tendency in the initial configuration. This made it possible to investigate the influence of different types of damping measures on their effectiveness. Techniques from the field of big data analysis and machine learning are tested to detect squeal in measured time series data. These techniques were remarkably reliable and made it possible to detect squeal efficiently even in data that was not generated on a traditional costly NVH brake dynamometer. To investigate whether the simulation method usually used for the simulation of brake squeal is applicable to depicting the influence of additional damping in drum brakes, a complex eigenvalue analysis was performed with Abaqus, and the results were compared with those from the experiments.
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Rievaj, Vladimír, Lenka Mokričková i František Synák. "Temperature of the brakes and the Braking Force". Transport and Communications 5, nr 1 (2017): 13–16. http://dx.doi.org/10.26552/tac.c.2017.1.3.
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The kinetic energy of the braking vehicle is changed into heat and the resulting heat increases the temperature of each part of brakes. The changed temperature affects the coefficient of friction between the brake lining and brake drum of brake disc. Unless the brakes are actuated hydraulically there is the warning brake pads and brake fluid. Object of examination in this article is the impact of repetitive braking to change of these parameters and the impact of time to change the boiling point of the brake fluid.
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Afnison, Wanda, Wagino Wagino, Nuzul Hidayat, Muslim Muslim i Masykur Masykur. "Analysis Thermal Pada Solid dan Ventilated Disk Brake Pada Mobil Hemat Energy Pagaruyuang Team UNP". Jurnal Mekanova: Mekanikal, Inovasi dan Teknologi 7, nr 1 (24.06.2021): 44. http://dx.doi.org/10.35308/jmkn.v7i1.3699.
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This study discusses the thermal analysis of the disc brakes used in UNP energy-efficient cars. There are three types of disc brake designs that are simulated, namely solid disc brake, circular hole ventilated and vane ventilated types. Using the finite element method, the three disc brake designs analyzed the characteristics of the heat received from the braking process. Disc brakes with better heat dissipation ability are the most suitable type to use. From the simulation results, the ventilated (circular hole) disc brakes have the best heat dissipation capability with a maximum temperature of 635,520 K, lower than the vane and solid types where the maximum is obtained. temperatures of 5700 K and 809.50 K . The vane type disc brake design is a disc brake design with the worst heat dissipation capability which has the highest final temperature of 809.50 K.Keywords—Thermal analysis, disk brake, heat, high efficiency vehicle
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Kumar Madan, Ashok, Saksham Dabas, Sanchit Behal i Vishesh Chhabra. "Analysis of Ventilated Disc Brake Using Ansys with Computer Aided Manufacturing". International Journal of Advance Research and Innovation 10, nr 4 (2022): 22–33. http://dx.doi.org/10.51976/ijari.1042204.
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Safety is the most important parameter while developing a modern vehicle. A vehicle capable of high acceleration must decelerate quickly as well. Disc brakes are used in modern vehicles to reduce stopping distance. On application of brakes, the disc is subjected to thermal and structural stresses. The brakes fail to slow down or stop the vehicle if they become too hot. In this study, we attempt to understand the existing disc brake rotors in use in the automobile industry and improve on their design in order to enhance heat dissipation. The currently used disc brakes are studied to understand their design. This knowledge is further used to design a useful disc brake. The aim of this paper is to improve heat transfer rate by designing disc rotors and selecting suitable material.
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Shirose, Burhanuddin, Kunal Yadav, LS Meenatchi i K. Vedhanarayan. "Robotic arm for brake performance testing". Journal of Physics: Conference Series 2251, nr 1 (1.04.2022): 012002. http://dx.doi.org/10.1088/1742-6596/2251/1/012002.
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Abstract Bikes require their brakes to be tested. There are adequately defined conditions under which these tests need to be performed: the brake pedal has to be pressed by a constant force. This force varies depending on the standardized test, but the value remains constant under each standard. No bike brake is perfect and thus has imperfections like disc thickness variation and disc misalignment. These imperfections cause judder due to which force experienced by the brakes under a specific pedal position varies too. This can create errors in tests and thus needs to be overcome for proper performance testing of brakes. “Robotic arm for brake performance testing” provides an effective solution by constantly measuring the braking force and instantly moving the brake pedal to keep the braking force constant.
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Yin, Jian, Qi Zhou, Xingbin Fang, Ziyuan Liu, Yu Liu, Shengfang Zhang i Zhihua Sha. "Study on Service Vibration Characteristics of High-Speed Train Disc Brake under Thermo-Solid Coupling". Applied Sciences 13, nr 22 (15.11.2023): 12361. http://dx.doi.org/10.3390/app132212361.
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This paper examines the effects of thermo-solid coupling and the influence of braking parameter changes on the vibration characteristics of high-speed train disc brakes. A multi-flexible body dynamics model of high-speed train disc brakes considering thermo-solid coupling was established to study the vibration characteristics of high-speed train disc brakes during service. The results show that the uneven distribution of temperature and stress produced during the brake disc’s service was the primary cause of the warping deformation of the brake disc, which prevented the brake disc and the brake pads from making sufficient contact and caused vibration while braking. By comparing the analytical findings of whether the model was subject to the coupling effect or not, the influence of thermo-solid coupling on the braking procedure was demonstrated from the standpoint of energy distribution. The severity of the high-speed train brake disc vibration gradually increased along with the braking pressure and initial speed. In addition, vibration aggravated the instability of the braking process, which could lead to thermoelastic instability and is harmful to the braking performance of the brake. These findings provide theoretical support for designing and manufacturing disc brakes for high-speed trains.
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Bawane, Prof S. G., Moksh Khajuria, Vaibhav Sontakke, Chetan Gharjare, Aniket Dhakate, Hemraj Sonkusare i Ramesh Rajput. "Review Paper of Design and Fabrication of Smart Electromagnetic Breaking System". International Journal for Research in Applied Science and Engineering Technology 10, nr 3 (31.03.2022): 1028–29. http://dx.doi.org/10.22214/ijraset.2022.40786.
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Abstract: According to a study 20-30% of the road accident cases are caused due to less attentiveness of vehicle driver or the failure of brakes and vehicles have mechanical brakes which requires a high mechanical force that cause a problem to handicap person so to overcome above described problem we came up with the idea of intelligent braking system with obstacles detection which has 3 parts first is electromagnets to provide automation to the brakes and second part is infrared sensor by sensing braking system can detect obstacles so that it can automatically send signal to relay and brakes can be applied third part is brake for which we electromagnet braking to provide smoothness and effective braking and the last and main part or brain of the system is infrared sensor and relay which gets the signal from sensor and activates the brakes So from this braking system we can provide the automation to a mechanical braking system which can be further modify and can be implement to vehicles the brakes in which we can fully rely on and can also be used in vehicles for handicaps that aren't able to apply conventional braking. 1) BRAKE • A brake is a mechanical device which retards motion. • Brakes use friction between two surfaces to convert the kinetic energy of the moving object into heat. 2) Need for Alternative These systems are prone to the wear and tear on usage a) Conventional braking systems produces continuous power dissipation as heat and may fail if the temperature rises too high b) Friction based braking methods are also not efficient under wet conditions
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Stefanovic, Slobodan, i Stefan Mladenovic. "ANALYSIS OF BRAKE SYSTEMS IN MOTOR VEHICLES USING PRACTICAL EXAMPLES FROM THE ASPECT OF THEIR DIAGNOSTICS". KNOWLEDGE - International Journal 54, nr 3 (30.09.2022): 505–11. http://dx.doi.org/10.35120/kij5403505s.
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The part of the braking system that has the task of transmitting the command activated by the driver to thebrakes is called the transmission mechanism. The transmission mechanism itself can be different depending on howit is constructed and conceptually executed. As for the conceptual solution, the question arises as to whether thetransmission method itself must be such that the driver's command is only transmitted to the brakes or the driver'scommand itself is handed over to a separate energy system. The energy system itself can be such that it additionallyhelps the activation of the brakes (servo brake force boosters) or completely takes over the activation of the brakes,with the creation of a certain braking force on the wheels, and these are the so-called mechanisms with full servoaction. Today we have the following transmission mechanisms in use: Mechanical transmission, hydraulic with orwithout servo amplification, hydraulic with full servo action, pneumatic with full servo action, hydro-pneumaticwith servo amplification or with full servo action. The very choice of these systems depends on a large number offactors, but the main one is - how much energy must be delivered to the brakes. Each of these systems is explainedseparately in the paper. A mechanical transmission mechanism is a system that does not have any additional servoamplification, but the command of the driver or the person operating the machine is directly transmitted to thebrakes. Based on this, we can conclude that the application of this transmission mechanism in brake systems is quitelimited. Today, this transmission mechanism is only used as a service brake on some slower trucks and tractors. Thehydraulic transmission mechanism is the system that is most common in brake systems of passenger, light cargo anddelivery vehicles. In the case of vehicles weighing up to 1000 kg, the driver alone is sufficient to develop thenecessary energy for braking, so it is not necessary to additionally support the braking force with servo boosters. Butthat's why smaller trucks and delivery vehicles need additional help from a servo booster to activate the brakingforce. Servo amplifiers have become an integral part of the equipment in passenger vehicles primarily due to thesafety, security and comfort of passengers. In contrast to the mechanical transmission, this system is morecomplicated in terms of performance and its operation is based on the transmission of pressure through the brakefluid from the main brake cylinder to the brake cylinder in the brakes. The pressure created by the brake fluid actson the pistons in the cylinder itself and in this way force is created and the brakes are activated. The main advantageof this system is the very safety and safer braking, because with the hydraulic system it is possible to make adistribution in several independent branches to the cylinders on the brakes, and this is one of the basic satisfactoryrequirements in the ECE regulation that the brakes must also have an auxiliary braking system in case dismissal ofthe principal. The system itself consists of: the pedal, which is activated by pressing the foot on the pedal itself, themain brake cylinder, the distribution system, the working brake cylinders in the brakes and the brake itself.
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Dias, Anderson L., Rômulo dN Rodrigues, Roberto dA Bezerra i Pierre Lamary. "Automotive simplex and duplex drum brake squeal analysis using the finite element method". Noise & Vibration Worldwide 53, nr 1-2 (styczeń 2022): 49–64. http://dx.doi.org/10.1177/09574565211052692.
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Despite the fact that disk brakes are used on almost entire mass produced vehicle, drum brakes are still applied on light-, medium-, and heavy-duty vehicles. However, both exhibit a high level of brake noises in which squeal is the most uncomfortable and one of the reasons behind high warranty costs that concern the automotive industry. Hence, the development of prediction methods and models of brake noise have prompted significant efforts. This study intends to analyze two types of drum brakes of a commercial automotive application. Their parametric finite element model comprises drum, shoes, and frictional linings and are submitted to a computational process that includes static calculations of the system under the brake forces to get a pre-stress state around which is computed the complex eigenvalues of the system which characterize their stability. These calculations indicate the unstable frequencies of the entire system. After the design of experiments (DOE) process, the influence of drum brake parameters on system stability can be seen. The friction coefficient and Young’s modulus presented a strong correlation with squeal incidence. At the end is presented a comparison and the optimal material parameters to decrease squeal noise occurrence of these brakes.
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García-León, R. A., N. Afanador-García i J. A. Gómez-Camperos. "Mechanical and Dynamic Maps of Disc Brakes under Different Operating Conditions". Fluids 6, nr 10 (13.10.2021): 363. http://dx.doi.org/10.3390/fluids6100363.
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The operating conditions during the braking process in an automobile affect the tribological contact between the pad and disc brake, thus, influencing the times and distances of braking and, in a more significant way, the safety of the braking process. This mathematical work aimed to provide a general visualization of the disc brake’s mechanical, dynamic, and thermal behavior under different operating conditions through 2D maps of the power dissipated, braking time, and braking distance of a disc brake with a ventilation blade N- 38 type. However, the dissipated energy on the disc brake in terms of temperature was analyzed considering Newton’s cooling law and mathematical calculations through classical theories of the dynamic and mechanical behavior of the disc brakes. For this purpose, the Response Surface Methodology (RSM) and Distance Weighted Least Squares (DWLS) fitting model considered different operating conditions of the disc brake. The results demonstrate that the disc brakes can be used effectively in severe operational requirements with a speed of 100 km/h and an ambient temperature of 27 °C, without affecting the occupant’s safety or the braking system and the pad. For the different conditions evaluated, the instantaneous temperature reaches values of 182.48 and 82.94 °C, where the high value was found for a total deceleration to 100 km/h to 0, which represent a total braking distance of around 44.20 to 114.96 m depending on the inclination angle (θ). Furthermore, the energy dissipation in the disc brakes depends strongly on the disc, blades and pad geometry, the type of material, parameters, and the vehicle operating conditions, as can be verified with mathematical calculation to validate the contribution of the effectiveness of the braking process during its real operation.
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Grygorcewicz, Paweł. "Results from Laboratory Tests of New Electric Brake Prototype". Journal of KONES 26, nr 3 (1.09.2019): 47–52. http://dx.doi.org/10.2478/kones-2019-0056.
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Abstract The main idea of this article was to compare the results of new design electric brake to the older version of hydraulic brake in laboratory tests. The energy of braking should be very similar due to the same mass of the airplane. That is why the laboratory tests of both brakes were took place in the same stand. Of course, the parameters were similar but not at all. The main idea was to create the solution, which could be used in vehicle like airplane. The electric brakes could replace traditional hydraulic brake solution. The results could be interesting for every researcher who is interested in brakes. Other important idea of this article was to describe the tests of new electric brake prototype. The purpose of the tests was to check designing of electric brakes. The electric brake prototype should ensure sufficient efficiency, safety, reliability and durability during braking, which is required in certification processes and is particularly important when researching innovative solutions. It was really important to verify the design and check the parameters. Of course, there is really important to remember that in every new type of the prototype solutions there are many pros and cons, which are typical only for considered design. Nowadays every electric brake design is different because there is a lot of new concept.
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Novianto, R. Arief, i Galuh Achmaditiya. "Impact of Adjusting Brake Lining Gap and Brake Drum Temperature on Brake Efficiency of Motor Vehicles". RSF Conference Series: Engineering and Technology 2, nr 2 (29.11.2022): 256–63. http://dx.doi.org/10.31098/cset.v2i2.579.
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In motor vehicle systems, brakes are one of the important components that have a major role in reducing the risk of accidents on the highway. In the brake system, especially drum brakes, improper component adjustment can cause the brakes not to work optimally. This research was conducted to determine the impact of large variations in the brake lining gap and brake drum temperature on brake efficiency in motorized vehicles. This study uses an experimental method with variations in the adjustment of the size of the brake lining gap and the temperature of the drum brake. The main brake efficiency was tested using a brake tester from these several variations. The variations of the brake lining gap used are 0.3 mm, 1 mm, and 1.7 mm. Meanwhile, the brake drum temperature is set at 30, 90, and 150 degrees Celsius. The result of this research is that the wider the brake lining gap, the smaller the brake efficiency. The greater the temperature on the drum brake also affects the smaller the efficiency of the brake. Meanwhile, the variable brake lining gap and temperature simultaneously (together) affect the level of brake efficiency. The larger gap between the lining and the temperature of the drum brake, the lower the efficiency of the brake obtained.
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Wang, Songlei, Fang Liu i Hui Jin. "Application of Conical Surface Brakes in Cranes". Journal of Physics: Conference Series 2437, nr 1 (1.01.2023): 012073. http://dx.doi.org/10.1088/1742-6596/2437/1/012073.
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Abstract Both drum brakes and disc brakes have their own structural limitations and advantages. As a new type of industrial brake, cone brake combines the advantages of electric hydraulic drum brake and electric hydraulic disc brake, makes up for the shortcomings of drum brake and disc brake, and greatly improves the service performance and safety performance of the brake. This paper introduces the structure composition and working principle of the conical surface brake, analyzes the advantages of the conical surface brake through the comparison with the drum brake, carries out experimental research, analyzes the test results, gives optimization suggestions for the existing shortcomings, and explores the application prospect of the new brake combined with the introduction of application examples. This paper provides a reference for the technical innovation of brake and a new choice for brake users.
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Diep, Bao Tri, Ngoc Diep Nguyen, Thanh T. Tran i Quoc Hung Nguyen. "Design and Experimental Validation of a 3-DOF Force Feedback System Featuring Spherical Manipulator and Magnetorheological Actuators". Actuators 9, nr 1 (13.03.2020): 19. http://dx.doi.org/10.3390/act9010019.
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This research focuses on the development of a new 3-DOF (Degree of Freedom) force feedback system featuring a spherical arm mechanism and three magnetorheological (MR) brakes, namely two rotary MR brakes and one linear MR brake. The first rotary MR brake is integrated in the waist joint to reflect the horizontal tangent force, the other rotary MR brake is integrated in the shoulder joint to reflect the elevation tangent force, while the linear MR brake is integrated in the sliding joint of the arm to reflect the radial force (approach force). The proposed configuration can reflect a desired force to the operator at the end-effectors of the arm independently in 3 DOFs by controlling the current applied to the coils of the MR brakes. After the introduction, the configuration of the proposed force feedback system is presented. Afterward, the design and conducted simulation of the MR brakes for the systems are provided. The prototype of the force feedback system, which was manufactured for the experiment, is then presented as well as some of the obtained experimental results. Finally, the proposed control system is presented and its implementation to provide a desired feedback force to the operator is provided.
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Yin, Yan, Jiusheng Bao, Jinge Liu, Chaoxun Guo, Tonggang Liu i Yangyang Ji. "Braking performance of a novel frictional-magnetic compound disc brake for automobiles". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 233, nr 10 (3.08.2018): 2443–54. http://dx.doi.org/10.1177/0954407018791056.
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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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Kęsy, Zbigniew, Ireneusz Musiałek i Seung-Bok Choi. "Design Optimization of a Hydrodynamic Brake with an Electrorheological Fluid". Applied Sciences 13, nr 2 (13.01.2023): 1089. http://dx.doi.org/10.3390/app13021089.
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This article describes the design optimization of a hydrodynamic brake with an electrorheological fluid. The design optimization is performed on the basis of mathematical model of the brake geometry and the brake’s electrical circuit. The parameters of the mathematical models are selected based on experimental tests of the prototype brake. Six different objective functions are minimized during the design optimization. The functions are created taking into consideration the following factors: the braking torque, brake weight, electric power absorbed by the brake, and the torque rise time. The assumed design variables are: the number of blades and the radii (inner and outer) of the brake’s working space. The optimization calculations are performed for two design variables intervals. The first interval is defined taking into consideration the accuracy of the mathematical model. The second, narrower interval is assumed for the tested prototypical brake. On the basis of the optimization calculation results, general guidelines are presented for the optimization of the hydrodynamic brakes with an ER fluid. In addition, the possibilities of optimizing the prototype brake are determined.
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Karthick, A., i L. Prakash. "Automatic Disc Braking System Experimental Investigation". Asian Review of Mechanical Engineering 5, nr 2 (5.11.2016): 18–30. http://dx.doi.org/10.51983/arme-2016.5.2.2416.
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The main objective of this project is for security system. If vehicle moves very near to the opposite vehicle then it applies brake automatically. It is used for avoiding accident over by racing in highways and parking or busy traffic areas through pneumatic braking. Pneumatic braking system works faster when compared to other devices. So we can achieve the high efficient operation by programming the microcontroller. The disc brake is a device for slowing or stopping the rotation of a wheel. Friction causes the disc and attached wheel to slow or stop. Brakes convert friction to heat, but if the brakes get too hot, they will cease to work because they cannot dissipate enough heat. This condition of failure is known as brake fade. Disc brakes are exposed to large thermal stresses during routine braking and extraordinary thermal stresses during hard braking.
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Huang, Shan, Jiusheng Bao, Shirong Ge, Yan Yin i Tonggang Liu. "Design of a frictional–electromagnetic compound disk brake for automotives". Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering 234, nr 4 (15.07.2019): 1113–22. http://dx.doi.org/10.1177/0954407019864210.
Pełny tekst źródłaStreszczenie:
According to the disadvantages of serious wear and heat fade of friction pad in frequent and high speed braking of friction brakes, and the insufficient power of electromagnetic brakes in low speed braking, a novel frictional-electromagnetic compound disk brake which combines both of these two brake principles is proposed for automotives in this paper. The excitation coils are designed based on the Zhang Yicheng theory model, and the compound brake prototype is manufactured based on the self-made magnetic brake pads and existing automotive brakes. The magnetic field and dynamic of the brake are simulated by using COMSOL Multiphysics software. The frictional–electromagnetic compound brake tests are implemented on the reconstructive disk brake simulation test bench. The experimental results show that the friction braking torque accounts for more than 90% of the compound braking torque in the process of compound braking, and the trend of the change is the same as that of the compound braking torque. When the initial braking speed exceeds 75 km/h, the electromagnetic braking torque does not increase with the increase in speed, instead, it decreases slightly because of demagnetization. The designed frictional–electromagnetic compound disk brake has good braking performance.
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Chen, Dong Fa, Li Ma, Xue Xun Guo i Qi Zhang. "Parametric FEM Analysis of Disc Brake". Applied Mechanics and Materials 483 (grudzień 2013): 199–202. http://dx.doi.org/10.4028/www.scientific.net/amm.483.199.
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A parametric FEM analysis method is introduced for the design of disc brakes. The basic process of parametric FEM modeling is summarized, the FEM model of disc brakes is established. Finally, the parametric FEM strength and stiffness analysis are conducted for the typical disc brake assembly.
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Məhərrəm oğlu Əliyev, Ələsgər. "Analysis of braking systems of classic drilling". SCIENTIFIC WORK 65, nr 04 (21.04.2021): 6–11. http://dx.doi.org/10.36719/2663-4619/65/6-11.
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The lowering and lifting of the drill strings during drilling is carried out using winches. One of the main elements of the winches is the braking system. The braking system of the drawworks is designed for: keeping the drill string suspended; power absorption during the descent of the string to the length of one candle with the highest permissible speed and complete braking at the end of the descent; smooth feed of the drill string as the well deepens while drilling. Braking devices used in drilling machines and mechanisms are divided into main and auxiliary ones according to their purpose.The main ones are designed to stop machines and mechanisms and are activated at the end of the movement with long interruptions in work, while auxiliary ones are for long-term braking in order to reduce the speed of movement. The brakes of classic drill bits consist of a main working belt-molded brake, as well as an auxiliary brake consisting of electromagnetic or hydrodynamic brakes. Key words: belt-molded brake, hydrodynamic brake, electromagnetic brake, electromagnetic ferro-dust brakes
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Kaluba, Marian, i Tadeusz Piechowiak. "Tasks of the IPS „TABOR” in the EU Project MODBRAKE". Rail Vehicles, nr 2 (2.04.2010): 6–12. http://dx.doi.org/10.53502/rail-139715.
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The paper describes an EU project MODBRAKE concerning standardization ac- tions about high-speed passenger train brakes, also showing the participation of the Institut of Rail Vehicle TABOR in Poznań in the project. A short history of train brakes is presented, discussing briefly the development phases and the benefits of using modules. EU actions concerning standardization actions about railway vehicles, particularly of train brakes under the MODBRAKE program, are presented. The short description of the new brake system with accordance to international TSI standardization is presented.
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Elbella, A., i A. Seireg. "Optimum Design of Crown Brakes". Journal of Mechanical Design 112, nr 4 (1.12.1990): 557–62. http://dx.doi.org/10.1115/1.2912646.
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The use of crown brakes with heat input from both the inner and outer surfaces has been suggested as a means of improving the performance of frictional brakes. This paper presents an algorithm for the design of the optimal thermal load sharing and configuration of the rotor for brakes with different ratios of inner and outer radius. Several illustrative examples are considered and the results show that significant improvement in the performance and weight of the brake rotor can be achieved by this approach.
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Listiyono, Listiyono, Nurhadi Nurhadi i Khambali Khambali. "Compressor Air Pressure and Brake Shield Distance Brake to Braking Accuracy on Brakes Antilock Braking System". Asian Journal Science and Engineering 1, nr 1 (30.06.2022): 37. http://dx.doi.org/10.51278/ajse.v1i1.419.
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The development of automotive technology to date is very fast. In the city, it is almost rare to find conventional cars. Most are already using modern technology. The hallmark of modern cars is that they are not fully mechanical. Already combined with several electric and pneumatic tools. Until now the development in the field of chassis is endless. Its initial development began with the discovery of ABS (Anti Lock Brake System) brakes. Basically, ABS is followed by supporting components such as EBD, ESP, and so on.All of this is actually inseparable from the main function of braking. Namely so that the car can run well,, deceleration and stop as desired appropriately. The parts of the brakes that are most influential are the brake shoes and discs and the compressed air from the brakes. Also the most influential accuracy is the distance of the brake shroud. Therefore, in this study the aims of 1. To find the effect of pressure and brake shroud distance. 2. What is the minimum air pressure and brake shroud for the brakes to work properly (grip). This research uses experimental design method. The data is processed with the Minitab program. Data processing shows that: 1. The braking speed is influenced by the amount of compressed air pressure. Partially the distance of the brake shroud does not affect the braking speed. But the interaction of pressure and shroud distance has an effect on braking speed. 2. Air pressure that can be used as a fast ABS braking process is 3.75 – 4.25 (bar) with a shroud distance of 5 (mm).
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Kernytskyy, Ivan, Dmytro Volchenko, Yuriy Royko, Dmytro Zhuravlev, Bohdan Dolishniy, Iryna Bekish, Vasyl Rys i in. "Complex heat exchange in brake friction pairs". Acta Scientiarum Polonorum. Architectura 23 (21.03.2024): 32–43. http://dx.doi.org/10.22630/aspa.2024.23.3.
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In the article, the following issues are considered: general principles of complex heat transfer in friction pairs of brake devices; radiant heat exchange from the rough surfaces of the metal friction elements of the brakes; the combined action of the fields of thermal conductivity and radiation in the metal friction elements of the brakes. The role of the thermal and dynamic boundary layers resulting from air-washing of metal brakes with open friction pairs and their effect on cooling is discussed. A new relationship between the Biot and Nusselt criteria is shown, which is presented in the form of thermal resistances of the surface and near-surface layers of the brake pulley rim. A comparison of the combined action of the fields of thermal conductivity and radiation in the metal friction elements of the brakes showed that the radiation efficiency is 1.5–1.7 W·m–2 times higher than the thermal conductivity. Radiation efficiency is the ratio of the power of the heat flux to the unit area through which the heat flux passes.
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Wen, Min. "An Analysis of the Coupling Between Temperature and Thermal Stress of Disc Brakes Based on Finite Element". International Journal of Heat and Technology 39, nr 6 (31.12.2021): 1819–27. http://dx.doi.org/10.18280/ijht.390616.
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Disc brakes have been more widely used in recent years due to its many merits such as fast heat absorption and dissipation, and resistance to water fade. Since it’s difficult to describe the failure of brakes under complex working conditions in only a few times of thermal-structural coupling simulations, this paper analyzed the coupling between temperature and thermal stress of disc brakes under multiple continuous braking conditions. At first, a 3D model of bus disc brake was built in ABAQUS, and its braking motion and dynamic parameters, heat flux density, convective heat dissipation coefficient, heat flux distribution coefficient, and other thermodynamic parameters were calculated. Then, the numerical simulation of the temperature field of disc brake and the coupling analysis of thermal stress under different braking conditions were completed. At last, experimental results gave the analysis results of the temperature distribution characteristics of brake disc surface, and the comparison and demonstration of the finite element analysis were conducted.
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Yella, Akash, Aditya Chaudhary, Ajay Bharinikala Yuva Venkat i Sriram Sundar. "Noise generated by a drum brake at various operating conditions". INTER-NOISE and NOISE-CON Congress and Conference Proceedings 265, nr 6 (1.02.2023): 1508–16. http://dx.doi.org/10.3397/in_2022_0208.
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Drum brakes are frequently found at the rear side of heavy vehicles and budget two-wheelers. The noise radiated from these brakes during typical operation plays a critical role in the passenger ergonomics. The acoustic behavior of an automotive drum brake during braking depends significantly on vehicle speed and actuation force as they change frequently. This work attempts to experimentally estimate the effect of these two braking conditions on the noise generated by a two-wheeler drum brake. A sub-scaled experimental setup (with instrumentation) of a drum brake has been developed for this purpose. The radiated sound pressure signals are captured as a result of varying these operating conditions. The acoustic effect of each condition is quantified using the sound pressure data. It is envisioned that the experimental analyses presented in this work will be helpful in better understanding the dependence of acoustic characteristics on the braking conditions, further leading to improvements in the design of brakes.
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Sathe, Sanket Rajendra, Saurabh Sharad Masal, Samadhan Laxman Kakade, Suyash Yelatwar i Prof S. J. Jagtap. "Regenerative Braking System: A Review". International Journal for Research in Applied Science and Engineering Technology 10, nr 5 (31.05.2022): 1390–92. http://dx.doi.org/10.22214/ijraset.2022.42551.
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Abstract: Electric cars square measure associate interest within the market. Today, existing braking technologies are used. This braking technology consumes tons of energy throughout braking within the style of heat. Therefore, regenerative braking is that the most significant methodology of focusing as a result of it's associate energy saving methodology. Increase the potency of electrical vehicles by reducing waste of energy. In electrical vehicle regenerative braking mode, the K.E. of the wheels is bornagain into electricity and keep within the battery or electrical condenser. This methodology has been improved mistreatment flywheels, DC-DC converters. Once a quick moving vehicle is applied a brake the momentum energy is wasted. The brake energy converter could be a compact system mounted in cylinder that absorbs this power and converts it to electricity that may be keep in battery for more use. Compact, efficient, low value and recycles energy nicely, prevents wastage. This method fits within the vacant house of the drum brakes of auto as a result of currently day's disk brakes square measure used. Low weight, compact size and power is made altogether four wheels of the vehicle. Straightforward construction, low value and straightforward to use. Absorbs brake power that the load on the hydraulic brakes is reduced thus less wear of brakes. Motor is within the earlier models with a centralized battery unit, system power to weight magnitude relation is extremely low, i.e., low power is made as compared to the burden of the system. Braking potency is low and tends to explosive brake in emergency conditions. Keywords: Energy, Brake, Electricity, Flywheel, Vehicle.
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Pawar, Abhijeet Vasant. "Design and Development of Braking and Wiring Systems in Go-Kart". International Journal for Research in Applied Science and Engineering Technology 9, nr VII (15.07.2021): 924–32. http://dx.doi.org/10.22214/ijraset.2021.36506.
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This paper is aimed to calculate and numerically analyse the effectiveness of Disc brakes before and after manufacturing of full scale Go-kart. Disc brakes are developed over time to time for being a reliable method of decelerating and stopping a vehicle. There are different designs of disk brake systems for various applications. This review gives an in depth description of various geometries of the components and therefore the materials utilized in a disk brake system. In spite of all the involvements, there are still many operational issues associated with disc brakes that need to be understand during operations and resolved. There has been tons of research happening about these issues and at an equivalent time different methods are being proposed to eliminate or reduce them. One major purpose of this paper is to provide a comprehensive overview of all such developments.
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Tian, Feng, Jinfeng Zhu i Zhenshe Zhang. "Design of a Drum Brake Turnover Machine". Journal of Physics: Conference Series 2417, nr 1 (1.12.2022): 012003. http://dx.doi.org/10.1088/1742-6596/2417/1/012003.
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In order to meet the demand of turning over brakes in an automatic assembly line of drum brakes, a drum brake turnover machine is designed. SolidWorks software is used to complete the three-dimensional modeling of the mechanical structure of the whole device; The control system of the drum brake turnover machine based on Schneider M241 PLC is designed, and the AC servo system control based on CANopen BUS is realized. The precise control of the position of reclaiming, overturning, discharging and turning angle of the drum brake is achieved. The engineering application results show that the equipment has a high degree of automation, stable operation, and good economy.
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Bawane, Prof S. G., Moksh Khajuria, Vaibhav Sontakke, Chetan Gharjare, Aniket Dhakate, Hemraj Sonkusare i Ramesh Rajput. "Design and Fabrication of Smart Electromagnetic Breaking System". International Journal for Research in Applied Science and Engineering Technology 10, nr 4 (30.04.2022): 2606–12. http://dx.doi.org/10.22214/ijraset.2022.41629.
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Abstract: According to a study 20-30% of the road accident cases are caused due to less attentiveness of vehicle driver or the failure of brakes and vehicles have mechanical brakes which requires a high mechanical force that cause a problem to handicap person so to overcome above described problem we came up with the idea of intelligent braking system with obstacles detection which has 3 parts first is electromagnets to provide automation to the brakes and second part is infrared sensor by sensing braking system can detect obstacles so that it can automatically send signal to relay and brakes can be applied third part is brake for which we electromagnet braking to provide smoothness and effective braking and the last and main part or brain of the system is infrared sensor and relay which gets the signal from sensor and activates the brakes So from this braking system we can provide the automation to a mechanical braking system which can be further modify and can be implement to vehicles the brakes in which we can fully rely on and can also be used in vehicles for handicaps that aren't able to apply conventional braking.
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Dragomir, George, Rares Pancu, Geza Husi, Liviu Georgescu i Horia Beles. "Studies about Reflected Temperature Variation for the Car Brake Disc". Applied Mechanics and Materials 822 (styczeń 2016): 135–40. http://dx.doi.org/10.4028/www.scientific.net/amm.822.135.
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An exact measurement of the disc brakes car temperature present difficulties, because the higher thermal stress is produced on the shiny metallic surface, which are in movement and in sliding contact with the brake pads. If an infrared camera is used for the thermal evaluating of the disc brakes, an important factor that must be considered is the reflected temperature. The aim of this research is to study the modification of the reflected temperature in correlation with the disk brake temperature and to establish a relationship for the estimation of this variation.
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Zhao, Xinyi, i Ye Lu. "A Comprehensive Performance Evaluation Method Targeting Efficiency and Noise for Muzzle Brakes Based on Numerical Simulation". Energies 15, nr 10 (13.05.2022): 3576. http://dx.doi.org/10.3390/en15103576.
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The installation of muzzle brake changes the flow direction of propellant gas, which leads to a decline in the recoil force but an increase in the muzzle flow noise of the side rear. Therefore, the coordination between high efficiency and low harm of muzzle brake is one of the factors limiting its optimization. To address this problem, a numerical method for evaluating the comprehensive performance of muzzle brake targeting muzzle brake efficiency and impulse noise is proposed in the present study. The two performance indexes are calculated using a computational fluid dynamics (CFD)-computational aeroacoustics (CAA) coupled method. Afterwards, a corresponding experiment is conducted to verify its feasibility. Furthermore, the comprehensive performance of muzzle brakes with three different structures are analysed based on the two indexes obtained by the proposed numerical method. The results reveal that both indexes can be influenced by the structure of muzzle brakes. The increased braking efficiency is almost accompanied by increased impulse noise, but the functional relation is not linear dependence. Thus, the comprehensive performance can be improved by optimization of the structure. The evaluation method proposed in this paper has theoretical significance for optimizing muzzle brakes, which is of great engineering value.