Buckling of Bilayer Laminates - A Novel Approach to Synthetic Papillae.

摘要

Cephalopods can reversibly change their appearance by expressing papillae folds, bumps, spikes, or even more complex structures on their skin for camouflage purposes. This project, in collaboration with Dr. Roger Hanlon, Marine Biological Laboratory, sought to examine the biomechanics of papillae formation, develop methods to simulate papillae formation, and develop biomimetic artificial papillae using synthetic materials. We have developed image correlation methods to analyze video of the active skin of cuttlefish, attempted several methods of measuring the skin mechanical properties, and contributed to research on the musculature of papillae. On the simulations side, we have developed a simple method of modulus perturbations for the numerical modeling of elastic instabilities. On the biomimetic side, we have developed a general platform using shape memory alloys that can develop reversible surface texture at the flip of a switch, and detailed mechanical model of the same using a shear lag approach. Finally, we have also examined the buckling of swollen crosslinked films, and buckling of thin films floating on viscous liquids.