3-D-Modeling of Process Zone in Concrete by Numerical Simulation

Schorn, H.; Rode, U.

doi:10.1007/978-1-4612-3578-1_22

Cited by 13 publications

(9 citation statements)

References 1 publication

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“…Furthermore, beam elements have the following advantage: When elements are removed during simulation a substantial part of the lattice may be connected to the reminder of the lattice through a single element only. When either truss elements or springs (with free rotations at their ends) are used instead of beams, the computation becomes unstable [21,25,36]. This instability disappears naturally in beam lattices.…”

Section: Short Review Of Lattice-type Fracture Modelsmentioning

confidence: 94%

Numerical investigation of crack growth in concrete subjected to compression by the generalized beam lattice model

et al. 2008

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The beam lattice-type models, such as the EulerBernoulli (or Timoshenko) beam lattice and the generalized beam (GB) lattice, have been proved very effective in simulating failure processes in concrete and rock due to its simplicity and easy implementation. However, these existing lattice models only take into account tensile failures, so it may be not applicable to simulation of failure behaviors under compressive states. The main aim in this paper is to incorporate Mohr-Coulomb failure criterion, which is widely used in many kinds of materials, into the GB lattice procedure. The improved GB lattice procedure has the capability of modeling both element failures and contact/separation of cracked elements. The numerical examples show its effectiveness in simulating compressive failures. Furthermore, the influences of lateral confinement, friction angle, stiffness of loading platen, inclusion of aggregates on failure processes are respectively analyzed in detail.

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Section: Short Review Of Lattice-type Fracture Modelsmentioning

confidence: 94%

Numerical investigation of crack growth in concrete subjected to compression by the generalized beam lattice model

et al. 2008

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“…Finally, numerical methods (i.e., studies on 'numerical' rather than 'real' concrete) have also been used to try to deduce the size of the process zone [e.g., [68][69][70]. Clearly, however, the results of such methods depend entirely on the a priori assumptions made in setting up the numerical models, and this cannot provide any definitive answers.…”

Section: Indirect Methodsmentioning

confidence: 99%

Workshop Proceedings: Toughening Mechanisms in Quasi-Brittle Materials Held on 16-20 July 1990 in Evanston, Illinois

Shah¹

1991

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“…The former can be found in [2][3][4][5][6][7]. Examples of the application of the truss elements were demonstrated in [13][14][15]. Since neither of the constituents of concrete is completely brittle, strain softening was taken as the constitutive relation in these numerical calculations.…”

Section: Previous Micromechanical and Simulation Modelsmentioning

confidence: 99%

Numerical analysis of crack propagation in tension specimens of concrete considered as a 2D multicracked granular composite

1997

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A B S T R A C T R !~ S U M 1 ~A numerical model is presented to study the mechanisms of microcrack propagation in concrete, the loaddisplacement response and the trajectories of the crack propagation in specimens under displacement control. The microstructure of concrete in this model is represented by a matrix, inclusions and pre-existing microcracks introduced around the inclusions. Both the matrix and the inclusions are assumed to be elastic, homogeneous brittle materials. The stiffness of the inclusions is considered to be three times higher than that of the matrix. Crack propagation in the numerically-generated concrete is controlled by fracture mechanics-based criteria and is calculated through the finite element method. The influence of the microstructure of concrete, the size and the distribution of grains, the properties of the interfacial zone between grains and the matrix, as well as the boundary conditions, on final crack patterns and loaddisplacement responses are investigated. The different appearance of the numerical load-displacement curves exhibiting the quasi-brittle behaviour observed in experiments is explained in terms of several points of view, especially the dynamic crack propagation. On pre'sente un module num&ique que l'on applique h l'~tude des m~canismes de la microfissuration du b~ton, de la r@onse en termes de courbe effort-d@lacement et des trajectoires de propagation des fissures clans des @rouvettes en d@lacement imposL La microstructure du bdton est repr~-sent~ par une matrice, des inclusions et des microfissures introduites clans la matrice autour des inclusions. Dans ce module, la matrice et les inclusions sont consid&~es comme &ant homogbnes, glastiques et fragiles. La rigiditd des inclusions est trois fois plus

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3-D-Modeling of Process Zone in Concrete by Numerical Simulation

Cited by 13 publications

References 1 publication

Numerical investigation of crack growth in concrete subjected to compression by the generalized beam lattice model

Numerical investigation of crack growth in concrete subjected to compression by the generalized beam lattice model

Workshop Proceedings: Toughening Mechanisms in Quasi-Brittle Materials Held on 16-20 July 1990 in Evanston, Illinois

Numerical analysis of crack propagation in tension specimens of concrete considered as a 2D multicracked granular composite

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