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Multiple Cracking and Tensile Behavior for an Orthogonal 3‐D Woven Si‐Ti‐C‐O Fiber/Si‐Ti‐C‐O Matrix Composite
Author(s) -
Ogasawara Toshio,
Ishikawa Takashi,
Ito Hiroshi,
Watanabe Naoyuki,
Davies Ian J.
Publication year - 2001
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.2001.tb00878.x
Subject(s) - materials science , composite material , ultimate tensile strength , composite number , fiber , tensile testing , cracking
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.