文档介绍：Tribology International 37 (2004) 395–404
ate/triboint
Coefficient of friction for aluminum in contact with a carbon fiber
posite
Joakim Scho¨n Ã
Swedish Defence Research Agency, FOI, SE-17290 Stockholm, Sweden
Received 1 July 2003; received in revised form 12 November 2003; accepted 27 November 2003
Abstract
In bolted joints, a large part of the load is transferred by friction. The objective of this investigation is to measure the coef-
ficient of friction for carbon fiber epoxy posite, HTA-6376, in contact with aluminum, 3637-77, in reciprocal sliding.
During testing, the coefficient of friction increased initially with number of cycles and after reaching a maximum, slowly
decreased. The initial coefficient of friction is approximately and the peak coefficient of friction after wear in is approxi-
mately . The coefficient of friction is independent of normal load. During wear, cracks are formed at the fiber–matrix inter-
face, which causes the matrix layer on the posite surface to break off in pieces. It also causes single fibers or groups
of fibers to be broken off and removed from the surface. Pieces of carbon fiber caused depressions in the aluminum surface. The
wear debris is reattached to posite surface but not to the aluminum surface.
# 2003 Elsevier Ltd. All rights reserved.
Keywords: Aluminum; Coefficient of friction; Carbon fiber posite; Reciprocal sliding