Roughness of crack interfaces in two-dimensional beam lattices.
The roughness of crack interfaces is reported in quasistatic fracture, using an elastic network of beams with random breaking thresholds. For strong disorders we obtain zeta = 0.86(3) for the roughness exponent, a result which is very different from the minimum energy surface exponent, i.e., zeta = 2 / 3. A crossover to lower values is observed as the disorder is reduced, the exponent in this regime being strongly dependent on the disorder.
Skjetne
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Department of Chemical Engineering, Norwegian University of Science and Technology, N-7491 Trondheim, Norway.
Helle
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Hansen
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