Research and prospect of ceramics for automotive disc-brakes

Li, Wanyang; Yang, Xuefeng; Wang, Shouren; Xiao, Jupeng; Hou, Qimin

doi:10.1016/j.ceramint.2020.12.206

Cited by 23 publications

(14 citation statements)

References 76 publications

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“…The two-norm form of u n h ð Þ can be used to express the displacement control of the structure as shown in equation (20).…”

Section: Topography Optimization Methodsmentioning

confidence: 99%

“…By modeling appropriate matrix and reinforcement volume percentages, low-density and highhardness characteristics of materials can be obtained. Li et al 20 discussed the research status and development trends of ceramics for automotive disc-brakes. According to the ceramic disc-brakes, various properties and characteristics, including fracture toughness, strength, compactness, corrosion resistance, wear resistance, micro-morphology, and thermal stabilities are analyzed.…”

Section: Introductionmentioning

confidence: 99%

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Multiobjective optimization of internal and surface structure of high-speed and heavy-duty brake disc

Yin

Hao

et al. 2022

Advances in Mechanical Engineering

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The brake disc plays a crucial role to keep the stable braking of a high-speed and heavy-duty disc brake. There is always high temperature, brake vibration, and even serious deformation under braking pressure and frictional resistance. To improve brake performance, this paper aims to find new internal and surface structures of the brake disc. An equivalent moving load (EML) topology optimization method for internal structure is proposed. Topography optimization method oriented to displacement and stress control for surface structure is carried out. Multiobjective functions containing thermal-structural coupled rigidity and natural frequency of the brake disc are established in the internal and surface structure optimizations. Internal and surface structures of the brake disc are optimized, and the mechanic properties of the brake disc are improved. Thermal-structural coupling and modal analyses are verified with high-speed and heavy-duty brake working conditions. The results show that new brake disc structures meet the requirements, and the effectiveness of the proposed EML topology optimization and topography optimization methods has been proved.

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“…The two-norm form of u n h ð Þ can be used to express the displacement control of the structure as shown in equation (20).…”

Section: Topography Optimization Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Multiobjective optimization of internal and surface structure of high-speed and heavy-duty brake disc

Yin

Hao

et al. 2022

Advances in Mechanical Engineering

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“…Cracks appear on the friction surface of a disc in the form of a mesh of microcracks [ 28 , 29 , 30 , 31 , 32 ] caused by the braking heating–cooling cycle. To avoid surface cracks, many research centers are conducting research into new materials for brake discs [ 33 , 34 , 35 , 36 , 37 ].…”

Section: Introductionmentioning

confidence: 99%

Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests

Sawczuk

Cañás

Ulbrich³

et al. 2021

Materials

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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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“…In order to avoid the phenomenon of surface cracks on brake discs, many research centers have conduct research on new materials for brake discs described in the articles [ 14 , 15 , 16 , 17 , 18 , 19 ]. These works are preceded by various numerical analyses in terms of stress concentrations, which were also presented in [ 20 , 21 , 22 , 23 , 24 , 25 , 26 , 27 , 28 ].…”

Section: Introductionmentioning

confidence: 99%

Modeling the Depth of Surface Cracks in Brake Disc

et al. 2021

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The article presents the state of knowledge and research in the field of surface cracks occurring in disc braking systems of rail and car vehicles. The craze formed during the operation of vehicles is particularly dangerous and leads to breaking the disc into several pieces. It may lead to a loss of braking force and damage to the entire disc brake caliper. The main aim of the research is to identify surface cracks in brake discs made of cast iron and use experimental methods to estimate their depth. Research were conducted on the disc braking system developed by the authors. In examining the location and depth of cracks, the penetration method, ultrasound, as well as a special probe were used. This device measures the crack depth based on the electrical resistance between two points on the surface of the metallic object. The tests showed that the first microcracks on the brake discs appeared after 309 braking tests on the test stand. In addition, it was observed that the surface cracks length of the disc increased linearly to depth until they reached about 11.5–12 mm with corresponded to crack lengths in the range of 65–70 mm. However, determination of the regression functions presented in the article allows to estimate the depth of surface cracks up to 70 mm long on cast iron brake discs by measuring their length.

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Research and prospect of ceramics for automotive disc-brakes

Cited by 23 publications

References 76 publications

Multiobjective optimization of internal and surface structure of high-speed and heavy-duty brake disc

Multiobjective optimization of internal and surface structure of high-speed and heavy-duty brake disc

Modeling the Average and Instantaneous Friction Coefficient of a Disc Brake on the Basis of Bench Tests

Modeling the Depth of Surface Cracks in Brake Disc

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