Effect of Cyclic Loading on the Monotonic Tensile Behavior of a 3-D Woven Si-Ti-C-O fiber/Si-Ti-C-O Matrix Composite

摘要

Fatigue behavior of an orthogonal 3-Dimentional woven Si-Ti-C-O fiber reinforced Si-Ti-C-O matrix composite was investigated at room temperature in air. Monotonic tension and tensile fatigue tests were conducted. As a result, the ultimate tensile strength increased with a loading rate. The fatigue life of the composite seems to be time-dependent. The damages during fatigue tests were evaluated by the reduction of Young's modulus, which was almost time-dependent. The residual strength of the fatigued specimen was investigated and the result was discussed.