NDLI: Hot bands and hot spots: Some direct solutions of continuous thermoelastic systems with friction

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Physical Mesomechanics : Volume 15, Issue 3-4, May 2012

Physical Mesomechanics : Volume 15, Issue 1-2, January 2012

Hot bands and hot spots: Some direct solutions of continuous thermoelastic systems with friction

Content Provider	Springer Nature Link
Author	Graf, M. Ostermeyer, Georg Peter
Copyright Year	2012
Abstract	Hot bands and hot spots are thermoelastic phenomena appearing in frictional systems with high energy dissipation like brake systems or clutches. These thermoelastic instabilities are driven by the interaction of friction-induced heat in the sliding plane and thermal expansion of the materials. Systems exposed to thermoelastic instabilities show a characteristic temperature pattern that can lead to local material damage and vibrations like judder or brake torque fluctuations. While hot bands are observable by a cut through the system normal to the direction of sliding, hot spots are described by a cut parallel to the direction of sliding. When an angle parameter is introduced in a model-based description, both types of thermoelastic instabilities can be described by one single model. Such a model is presented that comprises of layers corresponding to different mechanical parts (e.g. pad, disk, homogenized cooling channels). Every layer is described by field equations for thermoelastic behavior and heat conduction. All layers basically include the same set of solutions which can analytically be found by separation of complex variables. These solutions are scaled to satisfy the boundary conditions at the contact areas between the layers. No symmetry conditions are required, but if present, they can simplify the model. The stability of one thermoelastic phenomenon under investigation is determined by evaluating the characteristic equation of the system. The appearance of hot spots or bands, their spatial distribution and movement are discussed in terms of sliding velocity and other system parameters.
Starting Page	306
Ending Page	315
Page Count	10
File Format	PDF
ISSN	10299599
Journal	Physical Mesomechanics
Volume Number	15
Issue Number	5-6
e-ISSN	19905424
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2013-02-13
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Solid State Physics brake Materials Science hot banding clutch Mechanics thermoelastic instability judder hot spotting
Content Type	Text
Resource Type	Article
Subject	Mechanics of Materials Condensed Matter Physics Materials Science Surfaces and Interfaces

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