Date of Award
Master of Science
Department of Aeronautics and Astronautics
Marina B. Ruggles-Wrenn, PhD.
High temperatures and structural loads in advanced aerospace structures often result in complex loading conditions. This study is focused on biaxial (tension-torsion) testing of an oxide-oxide porous matrix ceramic matrix composite (CMC) (NextelTM 720/AS) thin wall tube with a novel involute layup. Tests included pure torsion and biaxial (tension- torsion) loading. Strain gages were used in addition to digital image correlation (DIC) to measure strains and to detect crack initiation and propagation. Room temperature and 1100°C uniaxial tests were performed in a build up approach prior to biaxial (tension-torsion) testing. Double-notch shear (DNS) specimens were tested at 1100°C in air to obtain interlaminar shear strength (ILSS).
DTIC Accession Number
DeRienzo, Joseph M., "Biaxial (Tension-Torsion) Testing of an Oxide/Oxide Ceramic Matrix Composite" (2013). Theses and Dissertations. 825.