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You are here: Home Events Dr. Benoit Roman "Tearing thin sheets : how to open a package and peel off scotch tape"

Dr. Benoit Roman "Tearing thin sheets : how to open a package and peel off scotch tape"

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Physique et Mécanique des Milieux Hétérogènes (PMMH) – ESPCI ParisTech, Paris, France

  • Seminar
When Feb 06, 2013
from 02:15 PM to 03:00 PM
Where Hörsaal Makromolekulare Chemie, Stefan-Meier-Str. 31, Freiburg
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When opening a package, one would like to propagate tearing cracks along paths that will allow to easily extract the content.

But sometimes we have the frustrating feeling that cracks in thin sheets follow their own will (think about peeling a piece of adhesive tape, or removing wallpaper).

I will review recent works which show that Indeed quasistatic cracks follow remarkably reproducible paths in thin sheet. I will try to demonstrate some of the experiments during the talk and give a simplified framework that can be used to predict these    trajectories, and possible applications.

References :
E.Hamm, P.M.Reis, M.Leblanc, B.Roman, E.Cerda Tearing as a test for mechanical characterization of thin adhesive films Nature Materials Vol.7 No 5, 386-390 (2008)
B.Audoly, P.M. Reis and B.Roman Cracks in thin sheets : When geometry rules the fracture path Phys.Rev.Lett. vol 95 025502 (2005)

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