http://www.cnr.it/ontology/cnr/individuo/prodotto/ID3941
Crack roughness in the two-dimensional random threshold beam model (Articolo in rivista)
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- Crack roughness in the two-dimensional random threshold beam model (Articolo in rivista) (literal)
- Anno
- 2008-01-01T00:00:00+01:00 (literal)
- Alternative label
Nukala, PKVV; Zapperi, S; Alava, MJ; Simunovic, S (2008)
Crack roughness in the two-dimensional random threshold beam model
(literal)
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- Nukala, PKVV; Zapperi, S; Alava, MJ; Simunovic, S (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
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- ISI Web of Science (WOS) (literal)
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- \"[Nukala, Phani K. V. V.; Simunovic, Srdan] Oak Ridge Natl Lab, Div Math & Comp Sci, Oak Ridge, TN 37831 USA; [Zapperi, Stefano] Univ Modena & Reggio Emilia, Dipartimento Fis, CNRS INFM, I-41100 Modena, Italy; [Zapperi, Stefano] ISI Fdn, I-10133 Turin, Italy; [Alava, Mikko J.] Helsinki Univ Technol, Dept Appl Phys, FIN-02015 Espoo, Finland (literal)
- Titolo
- Crack roughness in the two-dimensional random threshold beam model (literal)
- Abstract
- We study the scaling of two-dimensional crack roughness using large scale beam lattice systems. Our results indicate that the crack roughness obtained using beam lattice systems does not exhibit anomalous scaling in sharp contrast to the simulation results obtained using scalar fuse lattices. The local and global roughness exponents (zeta(loc) and zeta, respectively) are equal to each other, and the two-dimensional crack roughness exponent is estimated to be zeta(loc)=zeta=0.64 +/- 0.02. Removal of overhangs (jumps) in the crack profiles eliminates even the minute differences between the local and global roughness exponents. Furthermore, removing these jumps in the crack profile completely eliminates the multiscaling observed in other studies. We find that the probability density distribution p[Delta h(l)] of the height differences Delta h(l)=[h(x+l)-h(x)] of the crack profile obtained after removing the jumps in the profiles follows a Gaussian distribution even for small window sizes (l). (literal)
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