Presented is a new microplane model for concrete, labeled M5, which improves the representation of tensile cohesive fracture by eliminating spurious excessive lateral strains and stress locking for far postpeak tensile strains. To achieve improvement, a kinematically constrained microplane system simulating hardening nonlinear behavior (nearly identical to previous Model M4 stripped of tensile ...

Fracture processes in quasi-brittle materials are governed by the strain localization phenomenon, which involves formation of localized damage zones and cohesive cracks. In this work, we present numerical tools to model from onset propagation multiple intersecting Two main ingredients used for purpose: (i) a microplane describe initial anisotropic phase; (ii) strong discontinuity method introdu...

The incorporation of higher order strain gradients into the constitutive equations of continuum damage mechanics is presented. Thereby, not only scalar-valued isotropic damage models but also anisotropic damage models allowing for directional dependent sti€ness degradation are elaborated. An elegant possibility of describing anisotropic material behavior based on the microplane theory is demons...