block contact apply command

Syntax

block contact apply pore-pressure f <range>

This command allows fluid pressure to be specified at joint sub-contacts for rigid or deformable blocks. The specified fluid pressures do not change until a different block contact apply command is executed or the sub-contact is deleted. Each block contact apply command adds pressure into an incremental fluid force applied at the sub-contact. Positive pressures cause the joint to expand. In order to remove the pressure at a contact, apply the negative value of the pressure with the block contact apply command. Use the block contact list pore-pressure command for current values of fluid pressures in the model. Use the block contact list stress command for current values of the “effective” normal stress at sub-contacts in the model.

The fluid pressure is fixed at the sub-contacts lying within the optional range. If the range is omitted, the command is assumed to apply to all sub-contacts.