TEST OF CERAMIC MATRIX COMPOSITE T-JOINTS
Xie , Som R. Soni and Joseph E. Grady
joints made from ceramic matrix composite materials were
tested in a specially designed three-point loading fixture.
Several woven fiber reinforced ceramic matrix composites,
including SiC/SiC and Oxide/Oxide composites, were studied.
Two distinct failure modes were observed for composites
with different fiber architectures. All the specimens made
of 2D laminated composite failed due to delamination which
initiated at the joint of the web and the flange section.
However, all the specimens with 3D fiber architecture had
bending failure at the flange section. A real time system
was set up in the present study to view and record the whole
process of crack propagation and failure of the T-joint.