Zobrazeno 1 - 10
of 23
pro vyhledávání: '"Seppälä, E. T."'
Publikováno v:
Phys. Rev. B 71, 064112 (2005)
Void coalescence and interaction in dynamic fracture of ductile metals have been investigated using three-dimensional strain-controlled multi-million atom molecular dynamics simulations of copper. The correlated growth of two voids during the coalesc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0501369
Publikováno v:
Phys. Rev. Lett. 93, 245503 (2004)
Molecular dynamics simulations in three-dimensional copper have been performed to quantify the void coalescence process leading to fracture. The correlated growth of the voids during their linking is investigated both in terms of the onset of coalesc
Externí odkaz:
http://arxiv.org/abs/cond-mat/0410613
Publikováno v:
Phys. Rev. B 69, 134101 (2004)
The effect of stress-triaxiality on growth of a void in a three dimensional single-crystal face-centered-cubic (FCC) lattice has been studied. Molecular dynamics (MD) simulations using an embedded-atom (EAM) potential for copper have been performed a
Externí odkaz:
http://arxiv.org/abs/cond-mat/0310541
Publikováno v:
Europhys. Lett. 62, 35 (2003).
The energy of an elastic manifold in a random landscape at T=0 is shown numerically to obey a probability distribution that depends on size of the box it is put into. If the extent of the spatial fluctuations of the manifold is much less than that of
Externí odkaz:
http://arxiv.org/abs/cond-mat/0301604
Publikováno v:
Phys. Rev. B 66, 144403 (2002).
The structure of the three-dimensional random field Ising magnet is studied by ground state calculations. We investigate the percolation of the minority spin orientation in the paramagnetic phase above the bulk phase transition, located at [Delta/J]_
Externí odkaz:
http://arxiv.org/abs/cond-mat/0206376
Autor:
Seppälä, E. T., Alava, M. J.
Publikováno v:
Eur. Phys. J. B 21, 407 (2001)
We study the effect of an external field on (1+1) and (2+1) dimensional elastic manifolds, at zero temperature and with random bond disorder. Due to the glassy energy landscape the configuration of a manifold changes often in abrupt, ``first order''
Externí odkaz:
http://arxiv.org/abs/cond-mat/0104538
Publikováno v:
Phys. Rev. E 63, 066110 (2001)
We study at T=0 the minimum energy of a domain wall and its gap to the first excited state concentrating on two-dimensional random-bond Ising magnets. The average gap scales as $\Delta E_1 \sim L^\theta f(N_z)$, where $f(y) \sim [\ln y]^{-1/2}$, $\th
Externí odkaz:
http://arxiv.org/abs/cond-mat/0102318
Autor:
Seppälä, E. T., Alava, M. J.
Publikováno v:
Phys. Rev. E 63, 066109 (2001)
The ground state structure of the two-dimensional random field Ising magnet is studied using exact numerical calculations. First we show that the ferromagnetism, which exists for small system sizes, vanishes with a large excitation at a random field
Externí odkaz:
http://arxiv.org/abs/cond-mat/0102098
Publikováno v:
Phys. Rev. E 63, 036126 (2001)
We analyze intermittence and roughening of an elastic interface or domain wall pinned in a periodic potential, in the presence of random-bond disorder in (1+1) and (2+1) dimensions. Though the ensemble average behavior is smooth, the typical behavior
Externí odkaz:
http://arxiv.org/abs/cond-mat/0012109
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