Herringbone Buckling Patterns of Compressed Thin Films on Compliant Substrates

Abstract

A thin metal film vapor deposited on thick elastomer substrate develops an equi-biaxial compressive stress state when the system is cooled due to the large thermal expansion mismatch between the elastomer and the metal. At a critical stress, the film undergoes buckling into a family of modes with short wavelengths characteristic of a thin plate on a compliant elastic foundation. As the system is further cooled, a highly ordered herringbone pattern has been observed to develop. Here it is shown that the herringbone mode constitutes a minimum energy configuration among a limited set of competing modes.

Cephalopod-inspired design of electro-mechano-chemically responsive elastomers for on-demand fluorescent patterning

“…3b,dII, Movie 1). The pattern of wrinkles resembles those observed in bilayer systems induced by thermal expansion 41,42 , swelling 43,44 and ultraviolet or ion irradiation treatment 45,46 . As the applied electric field further rises, the valleys of the wrinkles are pinched down, forming a pattern of craters (Fig.…”

Surface instability of an elastic half space with material properties varying with depth

“…Surface wrinking may also provide a way of probing the surface characteristics of the materials (Stafford et al, 2004). Chen and Hutchinson (2004) developed a closed-form solution for the wrinkling of a gold layer deposited on an elastomer substrate. They modeled the structure as a plate on linear elastic foundation with infinite thickess.…”

Micro- and nanostructured electro-active polymer actuators as smart muscles for incontinence treatment

“…After releasing, wrinkles appeared because of the inability of the Crfilm to follow the compressive strain on the PDMS [15,16]. Finally, the conductive Au electrode was sputtered on the wrinkled surface.…”