Determination of moduli of continuous fiber ceramic composites (CFCCs)
- Univ. of Tennessee, Knoxville, TN (United States)
- Iowa State Univ., Ames, IA (United States); and others
Woven Nicalon{sup {trademark}} fiber fabric reinforced silicon carbide composites were fabricated by the Forced Chemical Vapor Infiltration (FCVI) method. Both through-thickness and in-plane (fiber fabric plane) moduli were determined using ultrasonic techniques. The through-thickness moduli were found to be much less than the in-plane moduli. Increasing the amount of porosity significantly decreased both in-plane and through-thickness moduli. A periodic model using a finite element method was formulated to predict the effect of porosity on the moduli of woven fabric composites. The finite element prediction showed the decreased moduli with increasing an amount of porosity. Furthermore, the through-thickness moduli were predicted to be much less than the in-plane moduli. These trends were in agreement with the experimental results. In addition, the predicted moduli were found to be close to the experimental results.
- OSTI ID:
- 175381
- Report Number(s):
- CONF-950686--
- Country of Publication:
- United States
- Language:
- English
Similar Records
Measurement and prediction of composite stiffness moduli
Nondestructive characterization of woven fabric ceramic composites