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Oscillatory fracture paths in thin elastic sheets Fissures oscillantes dans les feuilles elastiques minces
 

Summary: Oscillatory fracture paths in thin elastic sheets
Fissures oscillantes dans les feuilles ´elastiques minces
Beno^it Roman a
Pedro M. Reis b
Basile Audoly c
Simon De Villiers b
Vincent Vigui´e a
Denis Vallet a
aPMMH, UMR 7636 CNRS/ESPCI, 10 rue Vauquelin 75231 cedex 5 Paris, France.
bManchester Center for Nonlinear Dynamics, Dept. physics and astronomy, University of Manchester, M139PL UK
cLMM, UMR 7607 CNRS/UPMC, 4 place Jussieu, case 162, 75252 Paris cedex 05, France
Abstract
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. To cite this article:
B. Roman, P.M. Reis, B. Audoly, S. De Villiers, V. Vigui´e, D. Vallet, C. R. Mecanique 331 (2003).
R´esum´e
Nous pr´esentons une nouvelle instabilit´e oscillante de fissure qui se produit lorsqu'un indenteur assez large

  

Source: Audoly, Basile - Institut Jean Le Rond D'Alembert, Université Pierre-et-Marie-Curie, Paris 6

 

Collections: Materials Science; Physics