0
Research Papers

A 2D Lumped Parameter Model for Prediction of Temperature in C/C Composite Disk Pair in Dry Friction Contact

[+] Author and Article Information
A. Elhomani

Department of Mechanical Engineering and Energy Processes, Southern Illinois University at Carbondale, Carbondale, IL 62901-6603dellelhomani@hotmail.com

K. Farhang

Department of Mechanical Engineering and Energy Processes, Southern Illinois University at Carbondale, Carbondale, IL 62901-6603farhang@siu.edu

J. Thermal Sci. Eng. Appl 2(2), 021001 (Oct 21, 2010) (10 pages) doi:10.1115/1.4002523 History: Received January 14, 2010; Revised August 20, 2010; Published October 21, 2010; Online October 21, 2010

In applications involving substantial friction, surface failure is an inevitable phenomenon. Friction induced failure typically involves the generation of considerable heat. Existence of significant frictional force leads to relatively high interface temperature as a result of dynamic nature of flash temperatures at the contact areas. A first step in predicting friction induced failure is to develop an accurate thermomechanical model of the friction system. A thermomechanical model is developed in this paper based on a lumped parameter representation of a two-disk brake. A disk is viewed as consisting of three main regions: (1) the surface contact, (2) the friction interface, and (3) the bulk. The lumped parameter model is obtained by dividing a disk into a number of concentric rings and stacked layers. The friction layer contains both the interface and contact elements, each includes the equivalent thermal capacitance and conductive resistance. The contact capacitance and resistance are described in terms of the elastic contact interaction between the surfaces of the two disks. Therefore, they are obtained using the Greenwood and Williamson model for contact of rough surfaces. Each is described as a statistical summation of the micron-scale interaction of the surfaces.

Copyright © 2010 by American Society of Mechanical Engineers
Your Session has timed out. Please sign back in to continue.

References

Figures

Grahic Jump Location
Figure 1

Division of a disk into n rings and m layers

Grahic Jump Location
Figure 2

Heat flow in the first layer: in a friction cell

Grahic Jump Location
Figure 3

Thermal representation of a disk using lumped thermal elements

Grahic Jump Location
Figure 4

Lumped resistance and capacitance

Grahic Jump Location
Figure 5

Modeling the interface

Grahic Jump Location
Figure 6

Percent errors for Fa0(h), Fa1/2(h), Fa1(h), and Fa3/2(h)

Grahic Jump Location
Figure 7

Volumetric density

Grahic Jump Location
Figure 9

Friction coefficient

Grahic Jump Location
Figure 10

Contact surface temperatures during braking: at time equal to 10 s

Grahic Jump Location
Figure 11

Contact surface temperatures during braking: at time equal to 20 s

Grahic Jump Location
Figure 12

Contact surface temperatures during braking: at time equal to 30 s

Grahic Jump Location
Figure 13

Interface and bulk temperatures: stop time 35 s

Grahic Jump Location
Figure 14

Interface temperatures: stop time 35 s

Grahic Jump Location
Figure 15

Bulk temperature (ring 3): layer 1

Grahic Jump Location
Figure 16

Dynamometer testing

Grahic Jump Location
Figure 17

Comparison of bulk temperature and that measured by dynamometer

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In