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Fracture Surfaces in 3D Fuse Networks

Published online by Cambridge University Press:  15 February 2011

V. I. Räisänen ,
M. J. Alava  and
R. M. Nieminen
V. I. Räisänen
Affiliation:
Centre for Scientific Computing, P. O. Box 405, FIN-02101 Espoo, Finland
M. J. Alava
Affiliation:
Michigan State University, Department of Physics and Astronomy, E. Lansing, MI 48824–1116, U.S.A Laboratory of Physics, Helsinki U. of Technology, Otakaari 1M, SF-02150 Espoo, Finland (December 5, 1995)
R. M. Nieminen
Affiliation:
Centre for Scientific Computing, P. O. Box 405, FIN-02101 Espoo, Finland Laboratory of Physics, Helsinki U. of Technology, Otakaari 1M, SF-02150 Espoo, Finland (December 5, 1995)
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We study a 3D random fuse network model with computer simulations. The breaking thresholds are distributed randomly, corresponding to quenched disorder. We find for the roughness exponent of the final fracture surface ζ = 0.47 ± 0.19, which is close both the minimum energy surface value and the directed percolation depinning model value in 2+1 dimensions. It is also similar to results from measurements of fracture surfaces at nanometer scale, and from experiments in which the fracture process occurs slowly as in fatique. The traditional measure of damage, the number of broken bonds grows faster than the area effect (nb ˜ L2.28), with no signs of a trivally brittle regime.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 409: Symposium Q – Fracture-Instablility Dynamics, scaling and Ductile/Brittle Behavior , 1995 , 377
Copyright
Copyright © Materials Research Society 1996

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