Sequential simulation of thermal stresses in disc brakes for repeated braking

Rashid, Asim; Strömberg, Niclas

doi:10.1177/1350650113481701

Cited by 18 publications

(8 citation statements)

References 11 publications

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“…Moreover, computationally suitable approaches are being developed on the basis of Eulerian finite element simulations 3 for determining the thermomechanical interaction accounting for the brake disc’s rotation and taking advantage of its symmetry. 4–6 Such numerical finite element models allow simulations of repeated brake cycles but still need to be calibrated and validated with experimental studies on wear, friction and crack propagation. 7–10 Numerical analysis of crack growth under thermomechanical conditions has also been performed.…”

Section: Introductionmentioning

confidence: 99%

Disc brakes for heavy vehicles: an experimental study of temperatures and cracks

Gigan

Vernersson

Lundén

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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A better understanding of the thermomechanical loading of brake discs is important for controlling material fatigue and crack propagation in the disc. In the present study, full-scale drag braking experiments were performed on brake discs made from eight different grey cast iron alloys. The well-performing materials were also tested with an alternative brake pad material. A testing procedure with repeated drag brakings was used. The disc and pad temperatures were registered by thermocouples embedded at selected locations, and the disc surface temperatures by a thermocamera. Extensive analyses of the measured temperatures were performed. The results for the thermocouples at the mid-radius of the disc and at the end of brake applications indicatd that the two sides of the disc have opposite deviations from the mean temperature. The temperature deviations are generally temporally alternating, but also stationary variations can be found. The thermocamera gives the possibility of identifying the phenomena behind the temperature variations found from the thermocouples. Banding of the disc-pads contact with alternating one band and two bands of high temperatures is observed for the studied brake discs exposed to severe braking load cases. Moreover, it was found that hot-spot patterns develop on the disc surface, which are spatially fixed during each brake application. However, they may be either slowly migrating or fixed relative to the disc during consecutive brake applications. Thermal images show that small cracks do not affect hot-spot migration as a hot spot migrates over the crack. However, at a critical length of the crack, the heat becomes localized at the crack and increases its growth, thus limiting the life of the disc. The tests indicate that a combination of hot-spot migration, alternating bands and small temperature differences over the disc are significant factors to be considered when improving the lifespan of the discs.

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Section: Introductionmentioning

confidence: 99%

Disc brakes for heavy vehicles: an experimental study of temperatures and cracks

Gigan

Vernersson

Lundén

et al. 2014

Proceedings of the Institution of Mechanical Engineers, Part D:

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“…It has been shown in many previous works, e.g. [86,95,96,97], that during a hard braking, high compressive stresses are generated in the circumferential direction on the disc surface which cause plastic yielding. But when the disc cools down, these compressive stresses transform to tensile stresses.…”

Section: Cracks On Disc Surfacementioning

confidence: 99%

Overview of disc brakes and related phenomena - a review

Rashid

2014

IJVNV

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Disc brakes have evolved over time to be a reliable method of decelerating and stopping a vehicle. There have been different designs of disc brake systems for different applications. This review gives a detailed description of different geometries of the components and the materials used in a disc brake system. In spite of all the improvements, there are still many operational issues related to disc brakes that need to be understood in a greater detail and resolved. There has been a lot of research going on about these issues and at the same time different methods are being proposed to eliminate or reduce them. There has also been an intensive fundamental research going on about the evolution of tribological interface of disc-pad system. One major purpose of the present paper is to give a comprehensive overview of all such developments.

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“…The current research methods mainly include brake interface temperature test, 25 analytical calculation, 26–31 and numerical analysis. 32–92 Among them, the experimental exploration method is effective but costly, the analytical calculation of temperature field is accurate but difficult to solve, and the numerical analysis uses numerical methods to find the approximate solution, which is not very accurate, but with the continuous development of computers, the...…”

Section: Introductionmentioning

confidence: 99%

Research progress of temperature field calculation of disc brake braking interface based on numerical analysis

Wang

Fang

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part D:

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Disc brakes are the most widely used key components in the braking system of various types of machinery and equipment. When it works, it converts kinetic energy into thermal energy, which will make the braking interface overheat, thus leading to thermal recession of the brake disc and brake pad, which will eventually seriously affect the service life of the machine. The study of temperature changes at the working interface of disc brakes during braking is of great significance to the selection of brake friction pairs and the setting of braking parameters, and is an important theoretical guarantee for improving the service life of brakes. Currently, there are extensive researches on the analysis of temperature fields at the working interface of disc brakes. This paper summarizes the latest numerical research progress of the friction interface temperature field of disc brakes, and evaluates the research status of the friction interface temperature field model, temperature field solution method, and thermodynamics. The review finds that the current numerical method has become the most common method for conducting thermal analysis of disc brakes. The finite element analysis based on thermal modeling, thermal-mechanical coupling methods, and temperature distribution is able to provide more research basis for studying the thermal failure of brake friction pairs, thermal damage mechanisms, and friction material wear mechanisms. Improving the accuracy of the thermal model calculation will be an important research direction for the future numerical analysis of the temperature field of disc brakes.

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Sequential simulation of thermal stresses in disc brakes for repeated braking

Cited by 18 publications

References 11 publications

Disc brakes for heavy vehicles: an experimental study of temperatures and cracks

Disc brakes for heavy vehicles: an experimental study of temperatures and cracks

Overview of disc brakes and related phenomena - a review

Research progress of temperature field calculation of disc brake braking interface based on numerical analysis

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