Finite element analysis of frictionally-excited thermoelastic instability in 3D annular disk Online publication date: Mon, 18-Aug-2003
by Shuqin Du, James W. Fash
International Journal of Vehicle Design (IJVD), Vol. 23, No. 3/4, 2000
Abstract: The frictional heat generated during braking causes thermoelastic distortion that modifies the contact pressure distribution. If the sliding speed is sufficiently high, this can lead to frictionally-excited thermoelastic instability (TEI), characterised by major non-uniformities in pressure and temperature. In automotive applications, a particular area of concern is the relation between thermoelastically induced hot spots in the brake disks and noise and vibration in the brake system. Numerical implementation of Burton's perturbation analysis for thermoelastic instability in a two-dimensional model provides an extremely efficient method for determining the critical speed in simple sliding systems. In this paper, the two-dimensional model has been extended to an annular three-dimensional disk model in order to consider more realistic brake and clutch geometries and to provide more accurate critical speed. The results show that the eigenmodes exhibit focal hot spots along the circumference on each side of the disk and the thin disk is more stable than the thick disk when both disk thicknesses are below the optimal thickness.
Online publication date: Mon, 18-Aug-2003
If you are not a subscriber and you just want to read the full contents of this article, buy online access here.Complimentary Subscribers, Editors or Members of the Editorial Board of the International Journal of Vehicle Design (IJVD):
Login with your Inderscience username and password:
Want to subscribe?
A subscription gives you complete access to all articles in the current issue, as well as to all articles in the previous three years (where applicable). See our Orders page to subscribe.
If you still need assistance, please email email@example.com