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Generalized Anisotropic

The Generalized Anisotropic Strength option allows you to create a composite material model in which you can assign any strength model in Slide2 to any range of slice base orientations. For example, you could create a material with Hoek-Brown properties over a range of orientations, and Mohr-Coulomb properties over another range of orientations (e.g. to simulate a weak bedding orientation in a rock mass).

Example of Generalized Anisotropic Strength model

Generalized Anisotropic Strength Model Example

The Generalized Anisotropic Strength option allows you to assign any combination of strength models to any ranges of orientation.

To define a Generalized Anisotropic Strength function:

  1. Set the Strength Type = Generalized Anisotropic in the Define Material Properties dialog.
  2. Select the New button.
  3. You will see the Define Generalized Anisotropic Strength Function dialog.
  4. Enter a Function Name.
  5. For each desired angular range, enter the value of Angle To. NOTE:
    • The FIRST angular range always starts at –90 degrees (this is the default value of the FIRST Angle From value, and cannot be edited by the user).
    • The angular ranges must be ordered counter-clockwise, from –90 to +90.
    • The Angle From values cannot be edited, and are automatically defined by the Angle To value in the previous row.
    • The LAST angular range always ends at +90 degrees (this must be entered by the user, as the LAST Angle To value).
    • As the data is entered, the chart at the right of the dialog, will be updated to display the Generalized Anisotropic Function you are defining.
    • Check the chart carefully, to make sure that you have defined the intended function (i.e. all angular ranges and materials are correct).
    • You can use the buttons at the top of the data entry grid, to help carry out editing of the data (i.e. insert row, remove row, copy, paste etc)
  6. For each angular range, select the Material with the desired strength type for that range.
    • For example: if Material 1 was your Generalized Anisotropic material, and Material 2 was Mohr-Coulomb and Material 3 was Hoek-Brown, you could assign Material 2 or Material 3 to each angular range, to create a Generalized Anisotropic material which combined Mohr-Coulomb and Hoek-Brown properties.
    • You cannot assign a Generalized Anisotropic function to itself. For example: if Material 1 is your Generalized Anisotropic material, then you CANNOT choose Material 1 to assign to any angular range of the material.
  7. When all data has been entered, select OK, and you will be returned to the Define Material Properties dialog. The Name of the function you have just defined will appear in the Generalized Anisotropic Function list. By selecting a Function Name from this list, you can apply the Generalized Anisotropic Function to the current material.
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