| Abstrakt: |
The compressive strength of C/SiC composite at different strain rates, off-axis orientations and after high-velocity impact was studied. The compressive strength was found to be 137±23, 130±46 and 162±33 MPa at a strain rate of 3.3×10-5, 3.3×10-3, 3.3×10-3 s-1, respectively. On the other hand, the compressive strength was found to be 130±46, 99±23 and 87±9 MPa for 0°/90°, 30°/60° and 45°/45° fibre orientations to loading direction, respectively. After high-velocity impact, the residual compressive strength of C/SiC composite was found to be 58±26, 44±18 and 36±3.5 MPa after impact with 100, 150 and 190 m/s, respectively. The formation of kink bands in fibre bundles was found to be dominant micro-mechanism for compressive failure of C/SiC composite for 0°/90° orientation. On the other hand, delamination and the fibre bundles rotation were found to be the dominant mechanism for off-axis failure of composite. [ABSTRACT FROM AUTHOR] |
