Mechanisms of deformation and failure in carbon-matrix composites subject to tensile and shear loading

Journal Article · Sat Jul 01 04:00:00 EDT 1995 · Journal of the American Ceramic Society

DOI:https://doi.org/10.1111/j.1151-2916.1995.tb08897.x· OSTI ID:103613

Turner, K R; Speck, J S; Evans, A G ^[1]

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1. Univ. of California, Santa Barbara, CA (United States). Materials Dept.

The operative damage mechanisms in a series of C-matrix composites loaded intention and shear have been investigated. The composites contained either C fibers or Nicalon fibers, both with and without a carbon coating. The matrix consisted primarily of ex-phenolic carbon with a final carbon layer introduced by chemical vapor infiltration. Some composites have a high fiber/matrix sliding stress, {tau}. Failure of these materials is characterized by stochastic fiber failure with a diffuse fracture surface. The operative damage mechanisms have been identified and used in conjunction with available models to rationalize composite performance in terms of constituent properties (fiber, matrix, interface). The properties emphasized include the inelastic strain, as well as the ultimate tensile and shear strengths.

• Sponsoring Organization: USDOE
• OSTI ID: 103613
• Journal Information: Journal of the American Ceramic Society, Journal Name: Journal of the American Ceramic Society Journal Issue: 7 Vol. 78; ISSN 0002-7820; ISSN JACTAW
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CARBON
COMPOSITE MATERIALS
CRACKS
DAMAGE
FIBERS
FLEXURAL STRENGTH
INTERFACES
NOTCHES
OPTICAL MICROSCOPY
SHEAR PROPERTIES
SILICON CARBIDES
STRAINS
STRESSES
TENSILE PROPERTIES