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