"Carbon/carbon composites are a family of advanced composite materials. They are the most advanced form of carbon and consist of a fiber, based on carbon precursors, embedded in a carbon matrix. They are extensively used in design of sliding contact systems such as clutches and brakes because of their low weight, excellent thermal and mechanical properties, chemical inertness and self lubricating capability. They retain their mechanical strength in inert atmospheres up to 2000° C. However, in oxidizing environments, C/C composites rapidly react with oxygen forming gaseous carbon oxides around 450° C.
In the present study a C/C composite clutch assembly is modeled and studied under simulated operating conditions using ABAQUS finite element package code. The multidisk clutch is idealized as a 2D axisymmetric finite element model to study thermomechanical and tribological behavior of the clutch. A FORTRAN language programmed user subroutine FRIC is developed and implemented in the study to interface with the main ABAQUS code to study thermomechanical behavior and to calculate wear of the material along frictional surfaces.
The objective of this research is to develop a model to study thermomechanical and tribological behavior of ceramic composites under simulated operating conditions. In the present design, changes in the duty cycle of the clutch results in excessive wear of the clutch material. The model developed in this research will be helpful in developing a composite with a low wear rate, high coefficient of friction, low density, and high centrifugal strength"--Abstract, page iii.
Dharani, Lokeswarappa R.
Mechanical and Aerospace Engineering
M.S. in Mechanical Engineering
Air Force Research Laboratory (Wright-Patterson Air Force Base, Ohio)
Missouri University of Science and Technology. Center for Aerospace Manufacturing Technologies
Missouri University of Science and Technology
viii, 55 pages
© 2009 Shankar Nagaraj, All rights reserved.
Thesis - Restricted Access
Clutches (Machinery) -- Testing -- Computer simulation
Heat resistant alloys
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Electronic access to the full-text of this document is restricted to Missouri S&T users. Otherwise, request this publication directly from Missouri S&T Library or contact your local library.http://merlin.lib.umsystem.edu/record=b10817627~S5
Nagaraj, Shankar, "Modeling of wear and oxidation behavior of a carbon/carbon multidisk clutch" (2009). Masters Theses. 7367.
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