Hashin damage

The Hashin damage model predicts anisotropic damage in elastic-brittle materials. It is primarily intended for use with fiber-reinforced composite materials and takes into account four different failure modes: fiber tension, fiber compression, matrix tension, and matrix compression.

Context:

For more information, see Damage Initiation for Fiber-Reinforced Composites.

  1. From the menu bar in the Edit Material dialog box, select MechanicalDamage for Fiber-Reinforced CompositesHashin Damage.

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

  2. Select α=0 to use the model proposed in 1973 and α=1 to use the 1980 model. (For more information, see Damage Initiation for Fiber-Reinforced Composites.)
  3. To define material damage data that depend on temperature, toggle on Use temperature-dependent data.

    A column labeled Temp appears in the Data table.

  4. To define behavior data that depend on field variables, click the arrows to the right of the Number of field variables field to increase or decrease the number of field variables.

    Field variable columns appear in the Data table.

  5. Enter damage parameters in the Data table:

    Fiber Tensile Strength

    Fiber tensile strength.

    Fiber Compressive Strength

    Fiber compressive strength.

    Matrix Tensile Strength

    Matrix tensile strength.

    Matrix Compressive Strength

    Matrix compressive strength.

    Longitudinal Shear Strength

    Longitudinal shear strength.

    Transverse Shear Strength

    Transverse shear strength.

    Temp

    Temperature, θ.

    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.

  6. Select SuboptionsDamage Evolution to define the material degradation that takes place once damage begins.

    For more information, see Damage evolution.”

  7. Select SuboptionsDamage Stabilization to enter viscous coefficients and improve the model convergence.

    For more information, see Damage stabilization.”

  8. Click OK to exit the material editor.