Contact Properties
Properties are name-value pairs. Some properties are inheritable, which means that their
values can be derived from surface properties of the two pieces. The PFC model guarantees
that inheritable properties will be updated whenever the surface property of either piece is
modified. The guarantee requires that the inheritable property has its inheritance flag set
to true, and that both surface properties have the same name as the inheritable property.
Properties of contacts can be specified directly with the contact property
command. The
surface properties of pieces, on the other hand, can be specified with the ball property
,
clump property
, and wall property
commands. Properties of contacts can also be
specified directly by applying the CMAT to those contacts with the contact cmat apply
command.
For each contact model, a properties table provides a concise property reference. The property table columns indicate:
- the keyword (which indicates the keyword referring to the property to be used with appropriate commands or FISH functions);
- the mathematical symbol (which coincides with the symbol used in the contact-model formulation);
- a verbose description of the property;
- the value type (see the table below);
- the range over which the property may vary;
- the default value;
- whether or not the property is modifiable (all properties are readable, but only modifiable properties are writable); and
- whether or not the property is inheritable.
Type | Description |
---|---|
BOOL | Boolean value |
INT | integer number |
FLT | floating-point number |
VEC | 2D or 3D vector of floating-point numbers |
VEC2 | 2D vector of floating-point numbers |
VEC3 | 3D vector of floating-point numbers |
Was this helpful? ... | PFC 6.0 © 2019, Itasca | Updated: Nov 19, 2021 |