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Stress Corrosion Cracking in a Unidirectional Ceramic‐Matrix Composite
Author(s) -
Spearing S. Mark,
Zok Frank W.,
Evans Anthony G.
Publication year - 1994
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.1151-2916.1994.tb07030.x
Subject(s) - materials science , composite material , cracking , ceramic matrix composite , residual stress , ceramic , stress (linguistics) , composite number , matrix (chemical analysis) , fracture mechanics , tension (geology) , fracture (geology) , structural engineering , ultimate tensile strength , engineering , philosophy , linguistics
A study of matrix cracking in a unidirectional ceramic‐matrix composite under static loading conditions has been conducted. The evolution of crack density with time has been measured using both flexure and uniaxial tension tests. Subcritical cracking has been observed at stresses below that required to develop matrix cracks in short‐duration, monotonic loading tests. Furthermore, a relatively high final crack density has been observed following extended periods (∼10 6 s) under static load. A fracture mechanics analysis applicable to subcritical crack growth has been developed and used successfully to model the evolution of matrix cracking with time and applied stress. The model incorporates the properties of the matrix, fibers, and interfaces, as well as the residual stress and the initial flaw distribution in the matrix.