Vendredi 20 mars 1998
When a thin elastic sheet is crumpled, the stress becomes localized along a network of ridges. The ridges meet at peaks, which are locally conical, but not axisymmetric.
We analyze the geometry and elasticity of a single conical singularity on a crumpled elastic sheet using a physical realization in terms of a contact problem.
We verify some universal features of the analytically determined shape qualitatively and show that this solution charaterizes a macroscopic dislocation.