Effect of plasticity and atmospheric pressure on the formation of donut- and croissantlike buckles

Phys Rev E Stat Nonlin Soft Matter Phys. 2015 Jan;91(1):012410. doi: 10.1103/PhysRevE.91.012410. Epub 2015 Jan 30.

Abstract

The formation of donut- and croissantlike buckles has been observed onto the free surface of gold thin films deposited on silicon substrates. Numerical simulations clearly evidence that the coupling effect between the atmospheric pressure acting on the free surface and the plastic folding of the ductile film is responsible for the circular blister destabilization and the formation of the donut- and croissantlike buckling patterns.