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Tensile and Fatigue Behavior of Silicon Carbide Fiber‐Reinforced Aluminosilicate Glass
Author(s) -
Zawada Larry P.,
Butkus Lawrence M.,
Hartman George A.
Publication year - 1991
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.1151-2916.1991.tb06854.x
Subject(s) - materials science , composite material , silicon carbide , aluminosilicate , tension (geology) , ceramic matrix composite , ultimate tensile strength , calcium aluminosilicate , stress (linguistics) , cracking , stiffness , ceramic , modulus , fiber , biochemistry , chemistry , linguistics , philosophy , catalysis
The onset of damage accumulation in ceramic‐matrix composites occurs as matrix microcracking and fiber/matrix debonding. Tension tests were used to determine the stress and strain levels to first initiate microcracking in both unidirectional and cross‐ply laminates of silicon carbide fiber‐reinforced aluminosilicate glass. Tension–tension fatigue tests were then conducted at stress levels below and above the matrix cracking stress level. At stress levels below matrix microcracking, no loss in stiffness occurred. At stresses above matrix cracking, the elastic modulus of the unidirectional specimens exhibited a gradual decrease during the first 10 000 cycles, and then stabilized. However, the cross‐ply material sustained most of the damage on the first loading cycle. It is shown that fatigue life can be related to nonlinear stress–strain behavior of the 0° plies, and that the cyclic strain limit was approximately 0.3%.