Measurement and prediction of composite stiffness moduli
- Univ. of Tennessee, Knoxville, TN (United States)
- Iowa State Univ., Ames, IA (United States). Center for NDE
- Agency for Defense Development, DaeJon (Korea, Republic of)
Ultrasonic velocity measurements were made to yield the elastic stiffness constants of silicon carbide particle (SiCp) reinforced metal-matrix composites (SiC{sub p}/7091 Al) and woven fabric reinforced ceramic-matrix composites (Nicalon{trademark}/SiC). For SiC{sub p}/7091 Al composites the stiffness constants were determined by immersion ultrasonics. A dry-coupling ultrasonic method was used to measure the longitudinal moduli of the Nicalon{trademark}/SiC composites. The stiffness constants were found to be sensitive to the microstructure in each composite system. A unified micromechanics model was developed to predict the effect of microstructure on the elastic moduli of the two types of composites studied. The predicted moduli were found to be in good agreement with the experimental results.
- OSTI ID:
- 62981
- Report Number(s):
- CONF-941016--; ISBN 0-87339-247-7
- Country of Publication:
- United States
- Language:
- English
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ALUMINIUM BASE ALLOYS
CHEMICAL VAPOR DEPOSITION
CHROMIUM ADDITIONS
COMPOSITE MATERIALS
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ELASTICITY
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