Prediction of Lifetime in Static Fatigue at High Temperatures for Ceramic Matrix Composites

2010 ◽  
Vol 112 ◽  
pp. 129-140 ◽  
Author(s):  
O. Loseille ◽  
Jacques Lamon
Keyword(s):  
Crack Growth ◽  
High Temperatures ◽  
Slow Crack Growth ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Woven Composites ◽  
Static Fatigue ◽  
Matrix Composites ◽  
Random Load ◽  
Delayed Failure

Previous works have shown that ceramic matrix composites are sensitive to delayed failure during fatigue in oxidizing environments. The phenomenon of slow crack growth has been deeply investigated on single fibers and multifilament tows in previous papers. The present paper proposes a multiscale model of failure driven by slow crack growth in fibers, for 2D woven composites under a constant load. The model is based on the delayed failure of longitudinal tows. Additional phenomena involved in the failure of tows have been identified using fractographic examination of 2D woven SiC/SiC composite testspecimens after fatigue tests at high temperatures. Stochastic features including random load sharing, fiber overloading, fiber characteristics and fiber arrangement within the tows have been introduced using appropriate density functions. Rupture time predictions are compared to experimental data.

scholarly journals Fracture in Metallic Ribbon Reinforced Ceramic Matrix Composites

1992 ◽  
Vol 1 (3) ◽  
pp. 096369359200100
Author(s):  
Rajendra U Vaidya ◽  
K K Chawla ◽  
T K Lee ◽  
K N Subramanian
Keyword(s):  
Fracture Surface ◽  
Metallic Glass ◽  
Crack Growth ◽  
Glass Matrix ◽  
Slow Crack Growth ◽  
Amorphous Ribbon ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Glass Matrix Composite

The fracture surfaces of a metallic–glass (amorphous) ribbon reinforced glass–ceramic and metallic ribbon reinforced glass matrix composite were studied. The features observed in the fracture surface of the brittle matrix were interpreted in terms of fast and slow crack growth in these composites. The implications of the nature of this crack growth on the toughness of such composites was also investigated.

Subcritical crack growth mechanisms in ceramic matrix composites: experimental observations and modelling

2001 ◽  
Vol 16 (1/2/3) ◽  
pp. 132
Author(s):  
Charles A. Lewinsohn ◽  
Charles H Henager Jr ◽  
Charles F. Windisch ◽  
Edward P. Simonen ◽  
Russell H. Jones ◽  
...  
Keyword(s):  
Crack Growth ◽  
Subcritical Crack Growth ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Matrix Composites ◽  
Growth Mechanisms
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