Physics – Condensed Matter – Statistical Mechanics
Scientific paper
2001-10-04
Physics
Condensed Matter
Statistical Mechanics
submitted to Physical Review Letters
Scientific paper
10.1103/PhysRevE.65.045101
We study the geometrical characteristic of quasi-static fractures in disordered media, using iterated conformal maps to determine the evolution of the fracture pattern. This method allows an efficient and accurate solution of the Lam\'e equations without resorting to lattice models. Typical fracture patterns exhibit increased ramification due to the increase of the stress at the tips. We find the roughness exponent of the experimentally relevant backbone of the fracture pattern; it crosses over from about 0.5 for small scales to about 0.75 for large scales, in excellent agreement with experiments. We propose that this cross-over reflects the increased ramification of the fracture pattern.
Barra Felipe
Hentschel George H. E.
Levermann Anders
Procaccia Itamar
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