Specifying a concrete smeared cracking model

The concrete smeared cracking model allows you to define concrete behavior for relatively monotonic loadings under fairly low confining pressures. Abaqus assumes that cracking is the most important aspect of the behavior, and representation of cracking and postcracking behavior dominates the modeling. For more information, see Concrete Smeared Cracking.

  1. From the menu bar in the Edit Material dialog box, select MechanicalPlasticityConcrete Smeared Cracking.

    (For information on displaying the Edit Material dialog box, see Creating or editing a material.)

  2. Toggle on Use temperature-dependent data to define data that depend on temperature.

    A column labeled Temp appears in the Data table.

  3. Click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables on which the data depend.
  4. Enter the following data in the Data table:

    Comp Stress

    Absolute value of compressive stress. (Units of FL−2.)

    Plastic Strain

    Absolute value of plastic strain. The first stress-strain point given at each value of temperature and field variable must be at zero plastic strain and will define the initial yield point for that temperature and field variable.

    Temp

    Temperature.

    Field n

    Predefined field variables.

    You may need to expand the dialog box to see all the columns in the Data table. For detailed information on how to enter data, see Entering tabular data.

  5. Select Tension Stiffening from the Suboptions menu to model the postfailure behavior for direct straining across cracks. See Defining tension stiffening for a concrete smeared cracking model” for details.
  6. If desired, select Shear Retention from the Suboptions menu to define how shear stiffness diminishes as the concrete cracks. See Defining shear retention for a concrete smeared cracking model” for details.
  7. If desired, select Failure Ratios from the Suboptions menu to define the shape of the failure surface. See Defining the shape of the failure surface for a concrete smeared cracking model” for details.
  8. Click OK to create the material and to close the Edit Material dialog box. Alternatively, you can select another material behavior to define from the menus in the Edit Material dialog box (see Browsing and modifying material behaviors, for more information).