Paper Title:
On Crack Path in Fibres-Reinforced Ceramic Composites
  Abstract

A micromechanics study is presented of the matrix cracking of fibres-reinforced ceramic composites when subject to tensile stressing normal to fibres. Stability and/or instability of the straight micro-crack paths is investigated for a periodic array of originally collinear, slowly growing microcracks with fibres located in between the neighbouring micro-cracks tips. The relevant application e.g. refers to matrix cracking in 90° plies of cross-ply ceramic composites. The problem is solved using the technique of distributed dislocations and an approximate fundamental solution for a single edge dislocation lying in a general point between inclusion centres. The Muschelishvili complex potentials and the Galerkin method for a numerical evaluation of coefficients of suitable chosen bas functions are employed. Numerical results are presented showing an influence of mutual microcracks-fibres geometry and the mismatch of elastic properties on micro-crack path stability/instability.

  Info
Periodical
Edited by
Jaroslav Pokluda
Pages
299-302
DOI
10.4028/www.scientific.net/MSF.482.299
Citation
T. Profant, M. Kotoul, "On Crack Path in Fibres-Reinforced Ceramic Composites", Materials Science Forum, Vol. 482, pp. 299-302, 2005
Online since
April 2005
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