Speaker
Tuomas Tallinen
(University of Jyväskylä)
Description
We address the mechanical folding induced by differential
growth in soft layered solids via an elementary model that
consists of a soft growing neo-Hookean elastic layer adhered
to a deep elastic substrate. The model displays a transition
from supercritical smooth folding to subcritical cusped
folding as the layer/substrate modulus ratio is varied from
above unity toward zero. We demonstrate the diverse patterns
of cusped folds that can be generated in three dimensions
when the layer and substrate are of comparable softness,
providing understanding for some of the compressive folding
patterns found in soft tissues.
