New question #694290 on Yade:
https://answers.launchpad.net/yade/+question/694290
Dear yade launchpad team,
Situation:
An electrode consists of active material (sphere shaped particles) and
binding(polymers, slightly wet) material, which glues together the active
material. I want to simulate the compaction of the electrode and measure the
force on the wall as a function of wall displacement. More precisely: a loose
packing is confined by six walls. Then the upper wall moves downwards with
constant velocity (loading). After the force on the plate exceeds a defined
maximum it moves upwards again (unloading).
Challenge:
As a YADE beginner, it is hard to find the right contact law for this purpose.
In particular, I seek a contact law that accounts for, elasticity of the
particles, some cohesion (from the polymers) and gliding of particles under
pressure (movement of particles in the polymer matrix). The contact law I seek
should allow for gliding (position rearrangements) to dissipate energy during
the loading phase. This would mean that even though the cohesion doesnt break
I would have a macroscopic plastic deformation of the sample after the wall is
removed again.
Question:
Can someone experienced recommend a YADE contact law for the situation
described?
The contact law should feature:
a) cohesive bonds between particles, that hold when particles move
tangentially.
b) (viscous) damping - something that dissipates energy from shear/normal
velocity during loading.
c)enable positional rearrangement, s.t. the compacted structure is
maintained when unloading.
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