Parametric Study Of The Crack Stability In Metal Particulate-reinforced Ceramic Matrix Composites
Author(s)
R. Urbiš, M. Kotoul & J. Vrbka
Abstract
Parametric study of the crack stability in
metal particulate-reinforced ceramic matrix
composites
R. Urbis, M. Kotoul & J. Vrbka
Department of Solid Mechanics, Brno University of Technology,
Czech Republic
Abstract
The restraining effect of second-phase particles on an advancing crack front
is analyzed. The stress-crack opening displacement relationship relies upon
the constant volume plastic flow of the particles according to the model
suggested recently by Rubinstein and Wang [1]. This model incorporates
in a certain way also the particle/matrix interface properties. The particles
are allowed to deform using several different patterns which correspond to
the particular strength of the particle/matrix interface. Contrary to Ru-
binstein and Wang's work the triaxiality of the stress state within particles
and strain hardening effects are considered and their impacts on the critical
crack opening displacement are investigated. The toughness increase is pre-
dicted for sever
Keywords
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