  We study the onset of delamination blisters in a growing elastic sheet
adhered to a flat stiff substrate. When the ends of the sheet are kept fixed,
its growth arouses residual stresses that lead to delamination. This
instability can be viewed as a discontinuous buckling between the complete
adhered solution and the buckled solution. We provide an analytic expression
for the critical deformation at which the instability occurs. We show that the
critical threshold scales with a single dimensionless parameter that comprises
information from the geometry of the sheet, the mechanical parameters of
material and the adhesive features of the substrate.
