Concrete
In the Concrete subnode you define the properties for modeling materials with failure criteria representative of concrete. This material model can be used together with Linear Elastic Material and Nonlinear Elastic Material. It is available with the Geomechanics Module. Concrete is available for 3D, 2D, and 2D axisymmetry.
The failure criteria are described in the theory section:
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The Bresler–Pister Yield Criterion
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The Willam–Warnke Criterion
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The Ottosen Criterion
Concrete Model
Select the Material model— Bresler-Pister, Willam-Warnke, or Ottosen. The default values for the material parameters are taken From material. For User defined choices, enter other values or expressions.
Bresler–Pister
The defaults for the Tensile strength σts, Compressive strength σcs, and Biaxial compressive strength σbc are taken From material.
Willam–Warnke
The defaults for the Tensile strength σts, Compressive strength σcs, and Biaxial compressive strength σbc are taken From material.
Ottosen
The defaults for the Compressive strength σcs, Ottosen parameters a and b, Size factor k1, and Shape factor k2 are taken From material.
Tension Cutoff
If required, select either None or Principal stress cutoff.
When Principal stress cutoff is selected from the list, enter a value or expression for the Maximum tensile stress σt. Use this to constrain the concrete model with an extra yield surface, which limits the maximum principal tensile stress.
See also Tension Cutoff in the Structural Mechanics Theory chapter.
Advanced
It is possible to specify the maximum number of iterations and the relative tolerance used to solve the plastic flow rule. Enter the following settings:
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Maximum number of local iterations. To determine the maximum number of iteration in the Newton loop when solving the local plasticity equations. The default value is 25 iterations.
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Relative tolerance. To check the convergence of the local plasticity equations based on the step size in the Newton loop. The final tolerance is computed based on the current solution of the local variable and the entered value. The default value is 1e-6.
To display this section, click the Show More Options button () and select Advanced Physics Options in the Show More Options dialog box.
See also Numerical Solution of the Elastoplastic Conditions in the Structural Mechanics Theory chapter.
Location in User Interface
Context Menus
Solid Mechanics>Linear Elastic Material>Concrete
Solid Mechanics>Nonlinear Elastic Material>Concrete
Ribbon
Physics tab with Linear Elastic Material or Nonlinear Elastic Material node selected in the model tree:
Attributes>Concrete