15th annual conference on composites and advanced ceramics
Conference
·
OSTI ID:5518568
The room-temperature tensile testing of silicon carbide fiber reinforced reaction-bonded silicon nitride (SiC/RBSN) composite specimens was monitored by using in-situ x ray film radiography. Radiographic evaluation before, during, and after loading provided data on the effect of preexisting volume flaws (high density impurities, and local density variations) on the fracture behavior of composites. Results from (0)1, (0)3, (0)5, and (0)8 composite specimens, showed that x ray film radiography can monitor damage accumulations during tensile loading. Matrix cracking, fiber-matrix debonding, and fiber pullout were imaged throughout the tensile loading history of the specimens. Further, in-situ film radiography was found to be a helpful and practical technique for estimating interfacial shear strength between the SiC fiber and the RBSN matrix by the matrix crack spacing method. It is concluded that pretest, in-situ, and post-test radiography can provide for a greater understanding of ceramic matrix composite mechanical behavior, a verification of related experimental procedures, and a validation and development of related analytical models.
- Research Organization:
- National Aeronautics and Space Administration, Cleveland, OH (United States). Lewis Research Center
- OSTI ID:
- 5518568
- Report Number(s):
- N-91-22402; NASA-TM--103733; E--5971; NAS--1.15:103733; AVSCOM-TR--90-C-019; CONF-910162--; CNN: DA PROJ. 1L1-62211-A-47-A
- Country of Publication:
- United States
- Language:
- English
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In situ X-ray monitoring of damage accumulation in SiC/RBSN tensile specimens
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Related Subjects
36 MATERIALS SCIENCE
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
DEFECTS
FAILURE MODE ANALYSIS
FIBERS
IMPURITIES
MATERIALS
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS
360203* -- Ceramics
Cermets
& Refractories-- Mechanical Properties
CARBIDES
CARBON COMPOUNDS
COMPOSITE MATERIALS
DEFECTS
FAILURE MODE ANALYSIS
FIBERS
IMPURITIES
MATERIALS
MATHEMATICAL MODELS
MATRIX MATERIALS
MECHANICAL PROPERTIES
NITRIDES
NITROGEN COMPOUNDS
PNICTIDES
SILICON CARBIDES
SILICON COMPOUNDS
SILICON NITRIDES
SYSTEM FAILURE ANALYSIS
SYSTEMS ANALYSIS