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Overview of Disc Brakes and Related Phenomena - a literature review
Tekniska Högskolan, Högskolan i Jönköping, JTH. Forskningsmiljö Produktutveckling - Simulering och optimering.
2013 (English)Report (Other academic)
Abstract [en]

Disc brakes have evolved over time to be a reliable method of decelerating and stopping a vehicle. There have been dierent designs of disc brake systems for dierent applications. This review gives a detailed description of dierent geometries of the components and the materials used in a disc brake system. In spite of all the improvements, there are still many 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 dierent methods are being proposed to eliminate or reduce them. These methods include the changes in geometry of dierent components, dierent or improved materials, addition of new components and changes in cooling methods etc. There has also been an intensive 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.

Place, publisher, year, edition, pages
2013. , 45 p.
Series
JTH research report, ISSN 1404-0018
National Category
Vehicle Engineering
Identifiers
URN: urn:nbn:se:liu:diva-94282OAI: oai:DiVA.org:liu-94282DiVA: diva2:631329
Available from: 2013-04-18 Created: 2013-06-20 Last updated: 2013-06-24Bibliographically approved
In thesis
1. Simulation of Thermal Stresses in a Brake Disc
Open this publication in new window or tab >>Simulation of Thermal Stresses in a Brake Disc
2013 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In this thesis thermal stresses in a brake disc during a braking operation are simulated. The simulations are performed by using a sequential approach where the temperature history generated during a frictional heat analysis is used as an input for the stress analysis. The frictional heat analysis is based on the Eulerian method, which requires signicantly lower computational time as compared to the Lagrangian approach. The stress analysis is performed using a temperature dependent material model both with isotropic and kinematic hardening behaviors. The results predict the presence of residual tensile stresses in circumferential direction for both hardening behaviors. These residual stresses may cause initiation of radial cracks on the disc surface after a few braking cycles. For repeated braking an approximately stable stress-strain loop is obtained already after the rst cycle for the linear kinematic hardening model. So, if the fatigue life data for the disc material is known, its fatigue life can be assessed. These results are in agreement with experimental observations available in the literature.

The simulation results predict one hot band in the middle of the disc for a pad with no wear history. It is also shown that convex bending of the pad is the major cause of the contact pressure concentration in middle of the pad which results in the appearance of a hot band on the disc surface. The results also show that due to wear of the pad, dierent distributions of temperature on the disc surface are obtained for each new brake cycle and after a few braking cycles, two hot bands appear on the disc surface.

This sequential approach has proved tremendously cheap in terms of computational time so it gives the freedom to perform multi-objective  optimization studies. Preliminary results of such a study are also presented where the mass of the back plate, the brake energy and the maximum temperature generated on the disc surface during hard braking are optimized. The results indicate that a brake pad with lowest possible stiness will result in an optimized solution with regards to all three objectives. Another interesting result is the trend of decrease in maximum temperature with an increase in back plate thickness.

Finally an overview of disc brakes and related phenomena is presented as a literature review.

Place, publisher, year, edition, pages
Linköping: Linköping University Electronic Press, 2013. 23 p.
Series
Linköping Studies in Science and Technology. Thesis, ISSN 0280-7971 ; 1603
National Category
Engineering and Technology
Identifiers
urn:nbn:se:liu:diva-94345 (URN)LIU-TEK-LIC-2013:37 (Local ID)978-91-7519-575-9 (ISBN)LIU-TEK-LIC-2013:37 (Archive number)LIU-TEK-LIC-2013:37 (OAI)
Presentation
2013-08-29, Sal A33, A-huset, Campus Valla, Linköpings universitet, Linköping, 13:15 (English)
Opponent
Supervisors
Available from: 2013-06-24 Created: 2013-06-24 Last updated: 2013-06-25Bibliographically approved

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