Does anybody have some experience in the VFRICTION subroutine in Abaqus?

Dear all,

I am starting to use VFRICTION subroutine in ABAQUS. But the manual examples are very simple.

To start, I would like to implement the friction law that already exist in ABAQUS(penalty e.g.) to see how this subroutine works.

I do come across the ABAQUS Technical notes about subroutine FRIC in standard which explained the implementation in detail. I wonder if someone happen to know whether similar technical notes exist for VFRICTION in explicit or have experience working on VFRICTION before?

Any help will be very appreciated.

Hankang