Fatigue and flexural response of advanced carbon-carbon composites at room and elevated temperatures
The flexural response of SiC-coated carbon-carbon composites (ACC-4) at room and elevated temperatures is presented. Three-point bending tests were performed on virgin and mission-cycled specimens, and the variation in flexural strength is examined. The load-deflection behavior of the material at various temperatures is investigated, and the Weibull (1939) analysis of the strength data is performed. Micrographs of various cross sections in the damaged zone were taken, and the failure mechanisms are discussed. Fatigue tests were conducted under flexural loads, and the S-N diagram with the corresponding Weibull analysis are presented. Untested as well as fractured specimens under static and dynamic loading were C-scanned to identify the damaged zone and visualize the extent of the damage. Failure analyses are presented for both static and cyclic loading on the basis of NDE, the micrographs, and the experimental data. 15 refs.
- OSTI ID:
- 7110417
- Report Number(s):
- CONF-920144-; CODEN: CESPD
- Journal Information:
- Ceramic Engineering and Science Proceedings; (United States), Vol. 13:7-8; Conference: 16. annual conference on composites, materials, and structures, Cocoa Beach, FL (United States), 13-16 Jan 1992; ISSN 0196-6219
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
CARBON
FAILURE MODE ANALYSIS
FLEXURAL STRENGTH
COMPOSITE MATERIALS
SILICON CARBIDES
BENDING
DYNAMIC LOADS
ELASTICITY
FATIGUE
NONDESTRUCTIVE TESTING
PHOTOMICROGRAPHY
STATIC LOADS
TEMPERATURE DEPENDENCE
CARBIDES
CARBON COMPOUNDS
DEFORMATION
ELEMENTS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
NONMETALS
PHOTOGRAPHY
SILICON COMPOUNDS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TENSILE PROPERTIES
TESTING
360603* - Materials- Properties