Subcritical crack growth in fibrous materials

Details Subcritical crack growth in fibrous materials Subcritical crack growth in fibrous materials

2007-06-25

arxiv.org/abs/0706.3562v1

Europhysics Letters (EPL) 4, 74 (15/05/2006) 595

Physics

Condensed Matter

Materials Science

Scientific paper

10.1209/epl/i2005-10575-2

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.

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