Time dependent crack growth in ceramic matrix composites with creeping fibers

1995 ◽  
Vol 43 (11) ◽  
pp. 3927-3936 ◽  
Author(s):  
M.R. Begley ◽  
B.N. Cox ◽  
R.M. McMeeking
Keyword(s):  
Crack Growth ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Time Dependent ◽  
Matrix Composites ◽  
Time Dependent Crack Growth

scholarly journals Time Dependent Crack Initiation and Growth in Ceramic Matrix Composites

1997 ◽  
Author(s):  
Matthew R. Begley ◽  
Brian N. Cox ◽  
Robert M. McMeeking
Keyword(s):  
Crack Growth ◽  
Crack Tip ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Cracking ◽  
Time Dependent ◽  
Small Scale ◽  
Matrix Composites ◽  
Fine Grained ◽  
Growth Initiation

Matrix cracking in ceramic matrix composites with fine grained fibers at high temperatures will be governed by fiber creep, as relaxation of the fibers eliminates crack tip shielding. Using a time dependent bridging law which describes the effect of creeping fibers bridging a crack in an elastic matrix, crack growth initiation and history have been modeled. For a stationary crack, crack tip stress intensity factors as a function of time are presented to predict incubation times before subcritical crack growth. Two crack growth studies are reviewed: a constant velocity approximation for small-scale bridging, and a complete velocity history analysis which can be used to predict crack length as a function of time. The predictions are summarized and discussed in terms of identifying various regimes of crack growth initiation, subcritical growth, and catastrophic matrix cracking.

Time-Dependent Crack Initiation and Growth in Ceramic Matrix Composites

1998 ◽  
Vol 120 (4) ◽  
pp. 808-812
Author(s):  
M. R. Begley ◽  
B. N. Cox ◽  
R. M. McMeeking
Keyword(s):  
Crack Growth ◽  
Crack Tip ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Cracking ◽  
Time Dependent ◽  
Small Scale ◽  
Matrix Composites ◽  
Fine Grained ◽  
Growth Initiation

Matrix cracking in ceramic matrix composites with fine grained fibers at high temperatures will be governed by fiber creep, as relaxation of the fibers eliminates crack tip shielding. Using a time dependent bridging law that describes the effect of creeping fibers bridging a crack in an elastic matrix, crack growth initiation and history have been modeled. For a stationary crack, crack tip stress intensity factors as a function of time are presented to predict incubation times before subcritical crack growth. Two crack growth studies are reviewed: a constant velocity approximation for small-scale bridging, and a complete velocity history analysis which can be used to predict crack length as a function of time. The predictions are summarized and discussed in terms of identifying various regimes of crack growth initiation, subcritical growth, and catastrophic matrix cracking.

scholarly journals Effect of porosity on the nonlinear and time-dependent behavior of Ceramic Matrix Composites

2020 ◽  
Vol 184 ◽  
pp. 107658 ◽  
Author(s):  
Unni Santhosh ◽  
Jalees Ahmad ◽  
Greg Ojard ◽  
Imelda Smyth ◽  
Yasser Gowayed ◽  
...  
Keyword(s):  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Time Dependent ◽  
Matrix Composites ◽  
Dependent Behavior
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