ISSN 0862-5468 (Print), ISSN 1804-5847 (online) 

Ceramics-Silikáty 63, (1) 21 - 31 (2019)


MODELLING MATRIX MULTI-CRACKING EVOLUTION OF FIBRE-REINFORCED CERAMIC-MATRIX COMPOSITES CONSIDERING FIBRE FRACTURE
 
Li Longbiao
 
College of Civil Aviation, Nanjing University of Aeronautics and Astronautics No.29 Yudao St., Nanjing 210016, PR China

Keywords: Ceramic-matrix composites (CMCs), Matrix multi-cracking, Interface debonding, Fibre fracture
 

In this paper, the matrix multi-cracking evolution of fibre-reinforced ceramic-matrix composites (CMCs) considering fibre fracture have been investigated using the critical matrix strain energy criterion. The shear-lag model combined with the fibre fracture model and fibre/matrix interface debonding criterion is adopted to analyse the fibre and matrix axial stress distribution inside the damaged composite. The effects of the fibre volume fraction, the fibre/matrix interface shear stress, the fibre/matrix interface debonded energy, the fibre Weibull modulus and the fibre strength on the stress-dependent matrix multi-cracking development are discussed. The experimental matrix multi-cracking evolution of the unidirectional SiC/CAS, SiC/CAS-II, SiC/SiC, SiC/Borosilicate and mini-SiC/SiC composites are predicted.


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doi: 10.13168/cs.2018.0042
 
 
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