We study the mechanical response, and tearing features of crêpe paper, a two-dimensional, very anisotropic material, with one direction much less stiff than the other one. Depending on how the soft direction has been pre-stretched or not, the apparent Young modulus of the material can be varied over a broad range, while its fracture energy remains unaltered. The classical tearing concertina problem shows that a macroscopic measurement (the shape of the teared region) provides a direct access to the fracture properties of the material (effective Young's modulus, and fracture energy). The overall discussion is conducted in the frame of Griffith's theory of fracture.
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Nicolas Vandenberghe 1; Emmanuel Villermaux 1
@article{CRMECA_2019__347_4_382_0, author = {Nicolas Vandenberghe and Emmanuel Villermaux}, title = {A brittle material with tunable elasticity: {Cr\^epe} paper}, journal = {Comptes Rendus. M\'ecanique}, pages = {382--388}, publisher = {Elsevier}, volume = {347}, number = {4}, year = {2019}, doi = {10.1016/j.crme.2019.03.013}, language = {en}, }
Nicolas Vandenberghe; Emmanuel Villermaux. A brittle material with tunable elasticity: Crêpe paper. Comptes Rendus. Mécanique, Patterns and dynamics: homage to Pierre Coullet / Formes et dynamique: hommage à Pierre Coullet, Volume 347 (2019) no. 4, pp. 382-388. doi : 10.1016/j.crme.2019.03.013. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2019.03.013/
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