Subcritical crack growth in fibrous materials

Stéphane Santucci 1 Pierre-Philippe Cortet 1 Stéphanie Deschanel 2 Loïc Vanel 1 Sergio Ciliberto 1
1 Phys-ENS - Laboratoire de Physique de l'ENS Lyon
2 MATEIS - Matériaux, ingénierie et science [Villeurbanne]
Abstract : We present experiments on the slow growth of a single crack in a fax paper sheet submitted to a constant force $F$. We find that statistically averaged crack growth curves can be described by only two parameters : the mean rupture time $\tau$ and a characteristic growth length $\zeta$. We propose a model based on a thermally activated rupture process that takes into account the microstructure of cellulose fibers. The model is able to reproduce the shape of the growth curve, the dependence of $\zeta$ on $F$ as well as the effect of temperature on the rupture time $\tau$. We find that the length scale at which rupture occurs in this model is consistently close to the diameter of cellulose microfibrils.
Keywords : Slow rupture Crack growth Thermal activation
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Journal articles
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Submitted on : Friday, June 22, 2007 - 4:57:20 PM
Last modification on : Wednesday, September 11, 2019 - 11:20:05 AM
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Stéphane Santucci, Pierre-Philippe Cortet, Stéphanie Deschanel, Loïc Vanel, Sergio Ciliberto. Subcritical crack growth in fibrous materials. EPL - Europhysics Letters, European Physical Society/EDP Sciences/Società Italiana di Fisica/IOP Publishing, 2006, 74 (4), pp.595. ⟨10.1209/epl/i2005-10575-2⟩. ⟨ensl-00156825⟩

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