Desiccation and Relaxation Regimes in Fracture of Drying Clay Films

Details Desiccation and Relaxation Regimes in Fracture of Drying Clay Films Desiccation and Relaxation Regimes in Fracture of Drying Clay Films

2005-04-07

arxiv.org/abs/cond-mat/0504158v1

Physics

Condensed Matter

Soft Condensed Matter

8 pages, 7 figures

Scientific paper

A study of crack patterns in laponite films of different thickness is presented. Two cracking regimes are observed. The earlier with a higher rate of desiccation and shrinking has predominantly four-fold vertices in the crack network, while the later regime has less volume shrinking and forms mainly three-fold vertices. The pattern shows a self-similarity under coarse-graining. The graph of area covered by the cracks versus minimum crack-width resolved, scales with the film thickness. Curves representing crack area for different thickness can thus be made to collapse onto a single curve.

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