Abstract
An analytic constitutive model is derived for the post-peak behaviour of composite concrete. Tension softening is modelled in relation to propagation of a dominant crack against an effective toughness which accounts for crack deflection and the existence of distributed interfacial cracks. Analytic expressions for the tension softening curve and fracture energy are derived in terms of internal material parameters. Limited comparison between model predictions and experimental data and an overall discussion of the effects of internal material parameters on composites properties are presented.
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