Fig. 2.
Schematic phase diagram of the model spanned by the weak confinement 
and inverse deformability 
parameters, for fixed, high values of the bendability and defectability parameters, 
. Increasing confinement at a fixed deformability 
, Eq. 23, leads to distinct sequences of pattern transformation, depending on the value of 
: (A) For 
(highly stiff substrate), the axisymmetric state is stable for very weak confinement and becomes unstable to scars (S1
S2) above a confinement 
(orange). (B) For 
, the axisymmetric state becomes unstable to substrate wrinkles (W1
W3) at 
(pink), and a wrinkle–scar transition (W3
S2) occurs at 
. (C) For 
, the axisymmetric state becomes unstable first to tensional wrinkles (W1
W2) at 
(blue), then to substrate wrinkles at 
(W2
W3), and a wrinkle–scar transition (W3
S2) occurs again at 
. (D) Finally, for 
, the substrate deforms substantially beneath the sheet [similar to a sheet on a liquid drop (17)]. This regime is not addressed in the current study.