157nm_w=11.1mm_130dpi_28
Pictured is a thin polymer film floating on a bath of water and draped over a metal sphere, giving rise to radial wrinkles. The sheet is 157 nm thick and 22.2 mm wide.

“Curvature-induced stiffness and the spatial variation of wavelength in wrinkled sheets” appeared in PNAS (link). This work proposes and experimentally tests a basic framework for predicting wrinkle wavelengths in curved and/or non-uniform topographies.  Continue reading “Wrinkling on curved surfaces in PNAS”