Simulation verifies stress balance condition
400 frictionless beads packed sequentially in
2-dimensional container
Beads are shifted slightly to make contact forces
compressive
![](slide0008_image045.png)
![](slide0008_image046.png)
Applied sideways force
D. Head, A. Tkachenko, T. Witten
Éyet the pack is solid: supports transverse load
![](slide0008_image048.png)
![](slide0008_image050.png)
sxx / sYY remains roughly
constant:
Independent of load
sxy / sYY