Characterization of Fatigue Behavior of 2-D Woven Fabric Reinforced Ceramic Matrix Composite at Elevated Temperature

Author

Daniel J. Groner

Date of Award

12-1994

Document Type

Thesis

Degree Name

Master of Science

Department

Department of Aeronautics and Astronautics

First Advisor

Shankar Mall, PhD

Abstract

This study investigated the fatigue behavior and associated damage mechanisms in notched and unnotched enhanced Sic-SiC ceramic matrix composite specimens at 1100°C. Stiffness degradation, strain variation, and hysteresis were evaluated to characterize material behavior. Microscopic examination was performed to characterize damage mechanisms. During high cycle-low stress fatigue tests, far less fiber-matrix interface debond was evident than in low cycle-high stress fatigue tests. Notched specimens exhibited minimal stress concentration during monotonic tensile testing and minimal notch sensitivity during fatigue testing. Damage mechanisms were also similar to unnotched.

AFIT Designator

AFIT-GAE-ENY-94D-15

DTIC Accession Number

ADA289423

Recommended Citation

Groner, Daniel J., "Characterization of Fatigue Behavior of 2-D Woven Fabric Reinforced Ceramic Matrix Composite at Elevated Temperature" (1994). Theses and Dissertations. 6343.
https://scholar.afit.edu/etd/6343