Rok 2018

• A constitutive law for concrete with smooth transition from continuous into discontinuous cracks’ description

  Publikacja

  • J. Bobiński
  • J. Tejchman

  - Rok 2018

  Paper presents a constitutive model for concrete that combines a continuous and discontinuous crack’s description to simulate the concrete under tensile dominated loads. In a continuum regime, two different constitutive laws were used. First, a plasticity model with the Rankine failure criterion and an associated flow rule was used. Second, a constitutive law based on isotropic damage mechanics was formulated. Both model alternatives...

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• Mesoscopic simulations of crack propagation in concrete using cohesive elements

  Publikacja

  • W. Trawiński
  • J. Bobiński
  • J. Tejchman

  - Rok 2018

  The paper presents results of two-and three-dimensional meso-scale simulations of fracture in notched concrete beams subjected to three-point bending test. Concrete was assumed as a 3-phase material composed of aggregate grains placed in the cement matrix with Interfacial Transitional Zones (ITZs) between then. In 2D simulations macro-voids were also taken into account. The particle distribution was taken from real concrete beams...

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• Numerical investigations on early indicators of fracture in concrete at meso-scale.

  Publikacja

  • M. Nitka
  • J. Tejchman

  - Rok 2018

  Fracture is a major reason of the global failure of concretes. The understanding of fracture is important to ensure the safety of structures and to optimize the material behaviour. In particular an early prediction possibility of fracture in concretes is of major importance. In this paper, concrete fracture under bending was numerically analysed using the Discrete Element Method (DEM). The real mesoscopic structure of a concrete...

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