xmu in granular friction does not have any effect

Hi there

I performed a little research and the only mail near to my problem was Fonseca’s [http://lammps.sandia.gov/threads/msg05243.html] . Though it didn’t help.

I realised a plate made of grains which falls from above on a frictional horizontal plane.

It relaxes -> friction through gamma_n works. Nevertheless, as soon as I apply a horizontal force, no matter how little it is and what xmu value I set, plate gets toward “infinite and beyond”.

I attach the script

*.jpg are snapshots

ke.dat the kinetic energy of the plate

I am available for every other detail needed

Many thanks in advance



in.pour (2.26 KB)