Fatigue and flexural response of advanced carbon-carbon composites at room and elevated temperatures

Conference · Sat Aug 01 00:00:00 EDT 1992 · Ceramic Engineering and Science Proceedings; (United States)

OSTI ID:7110417

Mahfuz, H; Das, P S; Jeelani, S; Baker, D M; Johnson, S A

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--
• Journal Information: Ceramic Engineering and Science Proceedings; (United States), Journal Name: Ceramic Engineering and Science Proceedings; (United States) Vol. 13:7-8; ISSN 0196-6219; ISSN CESPD
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360603* -- Materials-- Properties
BENDING
CARBIDES
CARBON
CARBON COMPOUNDS
COMPOSITE MATERIALS
DEFORMATION
DYNAMIC LOADS
ELASTICITY
ELEMENTS
FAILURE MODE ANALYSIS
FATIGUE
FLEXURAL STRENGTH
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
NONDESTRUCTIVE TESTING
NONMETALS
PHOTOGRAPHY
PHOTOMICROGRAPHY
SILICON CARBIDES
SILICON COMPOUNDS
STATIC LOADS
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
TEMPERATURE DEPENDENCE
TENSILE PROPERTIES
TESTING