[Fissures oscillantes dans les feuilles élastiques minces]
Nous présentons une nouvelle instabilité oscillante de fissure qui se produit lorsqu'un indenteur assez large est forcé à travers une feuille mince fragile préalablement entaillée. Nos expériences révèlent que l'amplitude et la longueur d'onde de la fissure dépendent linéairement de largeur de l'indenteur sur une grande gamme de largeurs, et ne dépendent ni de la largeur du film, ni de la vitesse de découpe. Nous proposons un mécanisme pour cette instabilité, fondé sur un couplage entre l'avancée de la fissure et les déformations transverses du film.
We report a novel mode of quasi-static oscillatory crack propagation when a cutting tip of moderately large width is driven through a thin brittle polymer film. Experiments show that the amplitude and wavelength of the oscillatory crack paths scale linearly with the width of the cutting tip over a wide range of length scales but are independent of the width of the sheet and of the cutting speed. We propose a mechanism for this instability, based on the coupling between crack propagation and out-of-plane deformations of the film.
Accepté le :
Publié le :
Mots-clés : Rupture, Plaques élastiques minces, Fissure, Fissure oscillante
B. Roman 1 ; P.M. Reis 2 ; B. Audoly 3 ; S. De Villiers 2 ; V. Viguié 1 ; D. Vallet 1
@article{CRMECA_2003__331_12_811_0, author = {B. Roman and P.M. Reis and B. Audoly and S. De Villiers and V. Vigui\'e and D. Vallet}, title = {Oscillatory fracture paths in thin elastic sheets}, journal = {Comptes Rendus. M\'ecanique}, pages = {811--816}, publisher = {Elsevier}, volume = {331}, number = {12}, year = {2003}, doi = {10.1016/j.crme.2003.10.002}, language = {en}, }
TY - JOUR AU - B. Roman AU - P.M. Reis AU - B. Audoly AU - S. De Villiers AU - V. Viguié AU - D. Vallet TI - Oscillatory fracture paths in thin elastic sheets JO - Comptes Rendus. Mécanique PY - 2003 SP - 811 EP - 816 VL - 331 IS - 12 PB - Elsevier DO - 10.1016/j.crme.2003.10.002 LA - en ID - CRMECA_2003__331_12_811_0 ER -
B. Roman; P.M. Reis; B. Audoly; S. De Villiers; V. Viguié; D. Vallet. Oscillatory fracture paths in thin elastic sheets. Comptes Rendus. Mécanique, Volume 331 (2003) no. 12, pp. 811-816. doi : 10.1016/j.crme.2003.10.002. https://comptes-rendus.academie-sciences.fr/mecanique/articles/10.1016/j.crme.2003.10.002/
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