Damage and failure mechanisms of a 3-directional carbon/carbon composite under uniaxial tensile and shear loads
- CNRS-SEP-UB1, Pessac (France). Lab. des Composites Thermostructuraux
The mechanical behavior of a three-directional carbon/carbon (C/C) composite under tensile and shear loads is investigated in relation with the failure mechanisms and, the fiber architecture. This three-directional C/C composite was produced by Chemical Vapor Infiltration of a needled fiber preform of multiple layers of satin woven tows. The C/C composite exhibited several interesting features including an essentially non-linear stress-strain behavior and permanent deformations. Three families of matrix cracks were identified under tensile and shear loads, including microcracks in the tows, intertow delamination and cracks across the longitudinal tows. It was found that the delamination cracks affect preponderantly the stress-strain behavior and the mechanical properties. Similar features in the mechanical behavior and the failure mechanisms were highlighted under tension and under shear loading.
- OSTI ID:
- 302379
- Journal Information:
- Acta Materialia, Vol. 46, Issue 18; Other Information: PBD: 20 Nov 1998
- Country of Publication:
- United States
- Language:
- English
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