Effect of fiber fabric orientation on the monotonic and fatigue behavior of a continuous fiber ceramic composite
- Univ. of Tennessee, Knoxville, TN (United States). Dept. of Materials Science and Engineering
- Oak Ridge National Lab., TN (United States). High Temperature Materials Lab.
The monotonic fast fracture and fatigue behavior of a Nextel{trademark} 312 reinforced SiC matrix composite was investigated. In particular, the effect of fabric orientation with respect to the loading axis on the monotonic and fatigue behavior of the composite was examined in bending. Two geometries were investigated: transverse, where the fiber fabric was perpendicular to the loading direction; and edge-on where the fabric was parallel to the loading axis. The edge-on geometry showed higher flexure strengths than the transverse orientation. The different deformation mechanisms between the edge-on and transverse orientations were due to strong in-plane shearing of the fiber fabric and weak interlaminar shear of the plies, respectively. In cyclic fatigue, stress versus cycles (S-N) curves showed high fatigue endurance limits in both orientations, although the transverse orientation survived more cycles than the edge-on orientation at stresses slightly above the endurance limit.
- DOE Contract Number:
- AC05-84OR21400
- OSTI ID:
- 62975
- Report Number(s):
- CONF-941016--; ISBN 0-87339-247-7
- Country of Publication:
- United States
- Language:
- English
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