Porous matrix composites crack behavior

The mechanical behavior of porous-matrix composites has been modeled, but the compromises between matrix properties and toughness are not yet fully quantified. Initial estimates indicated that a matrix porosity of 30% is needed for crack deflection within a porous matrix [4, 43]. Subsequent efforts have been aimed at better quantifying the transition between porous and dense CMC failure behavior [44] however, further investigation is essential, especially considering the temperature dependent nature of the porous microstructure. 

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