Multiple Cracking and Tensile Behavior for an Orthogonal 3-D Woven Si-Ti-C-O Fiber/Si-Ti-C-O Matrix Composite |
| |
| Authors: | Toshio Ogasawara Takashi Ishikawa Hiroshi Ito Naoyuki Watanabe Ian J. Davies |
| |
| Affiliation: | National Aerospace Laboratory of Japan, Mitaka, Tokyo, 181–0015, Japan;Aerospace Systems Department, Tokyo Metropolitan Institute of Technology, Hino, Tokyo, 191–0065, Japan;Advanced Fibro Science, Kyoto Institute of Technology, Sakyo–ku, Kyoto, 606–8585, Japan |
| |
| Abstract: | This paper presents experimental results for the multiple microcracking and tensile behavior of an orthogonal 3-D woven Si-Ti-C-O fiber (Tyranno™ Lox-M)/Si-Ti-C-O matrix composite with a nanoscale carbon fiber/matrix interphase and processed using a polymer impregnation and pyrolysis route. Based on microscopic observations and unidirectional tensile tests, it is revealed that the inelastic tensile stress/strain behavior is governed by matrix cracking in transverse (90°) fiber bundles between 65 and 180 MPa, matrix cracking in longitudinal (0°) fiber bundles between 180 and 300 MPa, and fiber fragmentation above 300 MPa. A methodology for estimation of unidirectional tensile behavior in orthogonal 3-D composites has been established by the use and modification of existing theory. A good correlation was obtained between the predicted and measured composite strain using this procedure. |
| |
| Keywords: | |
|
|
