Slope Material Library

To define slope material properties, select Slope Material Library from the toolbar or the Slope menu. The available input parameters depend on the Analysis Method (Lumped Mass or Rigid Body) and whether fragmentation analysis is enabled.

Materials List

In the Material List, all currently defined materials are listed. The material being edited is highlighted. You can:

• Delete the selected material by clicking
• Add a new material by clicking
• Show only the materials that are assigned to the slope by clicking
• To set the current material library as the default for all new files, to export the current material library as a file, or to import materials into the library, click on

Lose All Kinetic Energy on Contact

When selected, the material is assumed to be fully damping, meaning that any rock contact would immediately cancel the rock's kinetic energy and stop the rock. This is a simplified approach for modelling complete energy loss on rock-slope contact, and no other parameter input would be required in the dialog (i.e., all other fields would become disabled when the user selects Lose All Kinetic Energy on Contact). This option may be used to model rock contact with a water body or a highly damping material. As the rock stops under any circumstance when in contact with this material, this option may be unrealistic in some cases (e.g., overhangs).

Slope Material Properties (Lump Mass Method)

The following slope material properties can be defined when using the Lump Mass analysis method.

• Normal and Tangential Restitution
• Friction Angle
• Slope Roughness

Statistical distributions can be defined for all variables.

Slope Material Properties (Rigid Body Method)

The following slope material properties can be defined when using the Rigid Body analysis method.

• Normal and Tangential Restitution
• Dynamic and Rolling Friction
• Forest/Vegetation Damping
• Slope Roughness
• Advanced Friction Parameters

Statistical distributions can be defined for all variables.

Predefined Materials

To access the list of predefined material types, click on the button. See Predefined Materials topic for more details.

Fragmentation

The Fragmentation tab is only accessible if the user has enabled fragmentation analysis from Project Settings. The slope material input parameter required for fragmentation analysis is the intact secant modulus based on unconfined compressive strength (UCS) tests. In the absence of test data, users may refer to reference values available via the Test Parameters Table.

For more details on the required slope material input parameter for fragmentation analysis, see:

• Fragmentation Overview
• Fragmentation Verification manual – provides examples on how input parameters are obtained and used
• Simplified Input Parameters for Fragmentation Analysis – provides examples on how input parameters are obtained and used