One of the failure mechanisms in fiber-reinforced composite materials
Fiber pull-out is one of the failure mechanisms in fiber-reinforced composite materials.[1] Other forms of failure include
delamination, intralaminar matrix cracking, longitudinal matrix splitting, fiber/matrix debonding, and fiber fracture.[1] The cause of fiber pull-out and
delamination is weak bonding.[2][page needed]
The figure is an example of how a fracture surface of this material looks like. The strong fibers form bridges over the cracks before they fail at elongations around 0.7%, and thus prevent brittle rupture of the material at 0.05%, especially under
thermal shock conditions.[5][page needed] This allows using this type of ceramics for
heat shields applied for the re-entry of
space vehicles, for
disk brakes and slide
bearing components.
References
^
abWJ Cantwell, J Morton (1991). "The impact resistance of composite materials -- a review". Composites. 22 (5): 347–62.
doi:
10.1016/0010-4361(91)90549-V.
^Serope Kalpakjian, Steven R Schmid. "Manufacturing Engineering and Technology". International edition. 4th Ed. Prentice Hall, Inc. 2001.
ISBN0-13-017440-8
^PWR Beaumont. "
Fracture mechanisms in fibrous composites". Fracture Mechanics, Current Status, Future Prospects. Edited by RA Smith. Pergamon Press: 1979. p211-33 in WJ Cantwell, J Morton (1991). "The impact resistance of composite materials -- a review". Composites. 22 (5): 347–62.
doi:
10.1016/0010-4361(91)90549-V.