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[Jan Stránský <question688400@xxxxxxxxxxxxxxxxxxxxx>]

Question #688400 on Yade changed:
https://answers.launchpad.net/yade/+question/688400

    Status: Open => Needs information

Jan Stránský requested more information:
Hello,

what version of Yade you use?

> top_mat
> bot_mat

next time please make the question and code consistent

> There is only friction between the two materials-no cohesion.

not in the provided code

> But even though I have a plate with a CNS load applied on top, during
the shearing process, top_mat starts to ''FLY'' up instead of sliding
and loses contact with bot_mat by pushing the CNS plate up, thereby
defying both the CNS and the gravitational forces in the system. I am
not sure why this is happening.

I could not reproduce this (probably because there is cohesive connection between top and bottom)
But, according to
> top_mat has its boundaries free only in the Y direction where it is allowed to move vertically up or down
then your description seems logical to me.. Is
Shear_Vel=0.1m/s
realistic? Maybe a real specimen would also jump in reality moving horizontally 10 cm per second (just guessing what could be wrong).

> P.S: I had modified the source code to have zero cohesion ONLY AT THE
INTERFACE: iscohesive=0, undamagedcohesion=0

please provide the code

cheers
Jan

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