A. Gasser et al., DAMAGE MECHANISMS OF A WOVEN SIC SIC COMPOSITE - MODELING AND IDENTIFICATION/, Composites science and technology, 56(7), 1996, pp. 779-784
Different matrix microcracking mechanisms are observed in ceramic-matr
ix composites under complex loading conditions. These mechanisms are i
ntroduced in the proposed model by using an anisotropic damage theory,
which rakes into account the effects due to microcrack opening and cl
osure, according to the state of the stress tensor (the behaviour is d
ifferent in tension and in compression). One difficulty is the identif
ication of this model for the woven SiC/SiC composite under study. Cla
ssical uniaxial tests (at 0 degrees and 45 degrees) are not sufficient
to identify the model completely. A combined biaxial tension test is
defined in order to determine the missing parameters. Internal pressur
e rests on tubes qualitatively validated the model. (C) 1996 Elsevier
Science Limited