# Smooth-Joint Model Methods

The methods of the Smooth-Joint Model model are shown below for reference. More detailed information regarding these methods is presented here.

smoothjoint
bond <keyword>

Bond the contact.

gap f1 <f2 >

Bond contacts with the gap interval specified. If only one value is specified this is the upper bound of the interval. If two values are specified they correspond to the lower and upper bounds of the interval, respectively. By default the interval is $$(-\infty,0]$$.

sj_setforce

Set the smooth-joint normal force from the current contact force.

unbond <keyword>

Unbond the contact.

gap f1 <f2 >

Unbond contacts with the gap interval specified. If only one value is specified this is the upper bound of the interval. If two values are specified they correspond to the lower and upper bounds of the interval, respectively. By default the interval is $$(-\infty,0]$$.