Plastic Deformation of 2D Crumpled Wires

When a single long piece of elastic wire is injected trough channels into a confining two-dimensional cavity, a complex structure of hierarchical loops is formed. In the limit of maximum packing density, these structures are described by several scaling laws. In this paper it is investigated this packing process but using plastic wires which give origin to completely irreversible structures of different morphology. In particular, it is studied experimentally the plastic deformation from circular to oblate configurations of crumpled wires, obtained by the application of an axial strain. Among other things, it is shown that in spite of plasticity, irreversibility, and very large deformations, scaling is still observed. PACS numbers: 62.20.F-; 62.20.dj; 46.35.+z; 46.70.Hg ‡ Corresponding author e-mail: [email protected]; fax: ++55 81 3271 0359; phone: ++55 81 2126 7614 Plastic Deformation of 2D Crumpled Wires 2