Main Help → All Commands → Deprecated Commands → Friction
The command has been deprecated. You should set crack friction properties using a ContactCracks command and set material-to-material friction using a Contact
material property instead.
The Friction
command can set the default contact conditions on crack surfaces or set custom material-to-material contact for multimaterial mode MPM:
Friction (frict),<(matid)>
where
(frict)
will result in automatic creation and use of a frictional contact law as:
(nonnegative number)
: creates a Coulomb Friction contact law with the provided coefficient of friction."stick"
: creates a Coulomb Friction contact law that sticks (or with a negative coefficient of friction)."none"
: creates a Coulomb Friction contact law with a zero coefficient of friction."single"
(or "ignore"
): creates a contact law that ignores contact.
(matid)
is the material ID for a previously defined material.
When the Friction
command is by itself, it defines the default frictional properties for crack contact. When it is used inside a material definition block, however, it defines custom frictional properties for contact between the current material and the other material specified in (matid)
(which is required) when using multimaterial mode MPM.
Friction
command for one of the two materials in each pair. Since you have to provide the material ID, you should use the Friction
command in the second material after the first one has already been defined.Friction
command is only allowed for MPM analyses.