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Thermoelastic contact problems in au...

Li, Jiayin.

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Thermoelastic contact problems in automotive brakes and clutches.

Record Type:	Language materials, printed : Monograph/item
Title/Author:	Thermoelastic contact problems in automotive brakes and clutches./
Author:	Li, Jiayin.
Description:	132 p.
Notes:	Adviser: James R. Barber.
Contained By:	Dissertation Abstracts International67-10B.
Subject:	Engineering, Automotive. -
Online resource:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3238018
ISBN:	9780542921773

Thermoelastic contact problems in automotive brakes and clutches.
Li, Jiayin.

Thermoelastic contact problems in automotive brakes and clutches. - 132 p.

Adviser: James R. Barber.

Thesis (Ph.D.)--University of Michigan, 2006.

This dissertation presents investigations on the phenomenon of frictionally excited thermoelastic instability (TEI) in an automotive disc brake and the transient behavior of thermoelastic contact problem in a loaded clutch.

ISBN: 9780542921773Subjects--Topical Terms:

1018477
Engineering, Automotive.

Thermoelastic contact problems in automotive brakes and clutches.
LDR:03208nam 2200325 a 45 001 972706
005 20110928
008 110928s2006 eng d
020 $a 9780542921773
035 $a (UMI)AAI3238018
035 $a AAI3238018
040 $a UMI $c UMI
100 1 $a Li, Jiayin. $3 1296680
245 1 0 $a Thermoelastic contact problems in automotive brakes and clutches.
300 $a 132 p.
500 $a Adviser: James R. Barber.
500 $a Source: Dissertation Abstracts International, Volume: 67-10, Section: B, page: 6015.
502 $a Thesis (Ph.D.)--University of Michigan, 2006.
520 $a This dissertation presents investigations on the phenomenon of frictionally excited thermoelastic instability (TEI) in an automotive disc brake and the transient behavior of thermoelastic contact problem in a loaded clutch.
520 $a A parametric study is conducted to determine the effect of material properties and geometries on TEI problems in an automotive disc brake. The stiffness of caliper, which supports the pads, has great effect on TEI problems. To obtain more accurate solution, caliper is involved into TEI analysis by using substructure technique.
520 $a A transient behavior of loaded clutch system is also investigated. Although TEI analysis can successfully predict the occurrence of instability, it cannot predict detailed evolution of the temperature and contact pressure fields. Therefore, transient analysis should be applied. Zagrodzki (2003) introduced a transient modal analysis (TMA) method to define a solution for the inhomogeneous (loaded) transient problem. In TMA, the temperature field appears as an integral of the applied loads convoluted with the eigenfunctions of the related homogeneous (unloaded) problem. Therefore, if sliding speed is variable, the eigenvalue solution should be repeated in each time step.
520 $a In this dissertation, two alternative strategies for increasing computational efficiency are developed. They are referred as fast speed expansion (FSE) method and one-point fast speed expansion (OPFSE) method. Both of them can be applied to reduce the number of required eigenvalue solutions, and hence, lead to significantly reduction of computational time. These two methods are applied to a multidisc clutch system. The results show that the FSE and OPFSE methods can greatly reduce the computational complexity of the transient analysis, while maintain good accuracy.
520 $a Contact area may change in size causing the thermoelastic problem to be non-linear. A transient solution of a three dimensional nonaxisymmetric thermoelastic contact problem is explored. This solution is applied to estimate the evolution of temperature field of a two-layer clutch system. The results show that, at a specific hydraulic pressure, maximum temperature reaches a peak value. In practice, maximum temperature could be reduced by increase of hydraulic pressure.
590 $a School code: 0127.
650 4 $a Engineering, Automotive. $3 1018477
650 4 $a Engineering, Mechanical. $3 783786
690 $a 0540
690 $a 0548
710 2 0 $a University of Michigan. $3 777416
773 0 $t Dissertation Abstracts International $g 67-10B.
790 $a 0127
790 1 0 $a Barber, James R., $e advisor
791 $a Ph.D.
792 $a 2006
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=3238018