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001-es BibID:	BIBFORM106122
035-os BibID:	(cikkazonosító)063121 (WoS)000812354100003 (Scopus)85132037842
Első szerző:	Batool, Attia
Cím:	Temporal evolution of failure avalanches of the fiber bundle model on complex networks / Attia Batool, Zsuzsa Danku, Gergő Pál, Ferenc Kun
Dátum:	2022
ISSN:	1054-1500 1089-7682
Megjegyzések:	We investigate how the interplay of the topology of the network of load transmitting connections and the amount of disorder of the strength of the connected elements determines the temporal evolution of failure cascades driven by the redistribution of load following local failure events. We use the fiber bundle model of materials' breakdown assigning fibers to the sites of a square lattice, which is then randomly rewired using the Watts?Strogatz technique. Gradually increasing the rewiring probability, we demonstrate that the bundle undergoes a transition from the localized to the mean field universality class of breakdown phenomena. Computer simulations revealed that both the size and the duration of failure cascades are power law distributed on all network topologies with a crossover between two regimes of different exponents. The temporal evolution of cascades is described by a parabolic profile with a right handed asymmetry, which implies that cascades start slowly, then accelerate, and eventually stop suddenly. The degree of asymmetry proved to be characteristic of the network topology gradually decreasing with increasing rewiring probability. Reducing the variance of fibers' strength, the exponents of the size and the duration distribution of cascades increase in the localized regime of the failure process, while the localized to mean field transition becomes more abrupt. The consistency of the results is supported by a scaling analysis relating the characteristic exponents of the statistics and dynamics of cascades.
Tárgyszavak:	Természettudományok Fizikai tudományok kutatási jelentés folyóiratcikk
Megjelenés:	Chaos. - 32 : 6 (2022), p. 1-10. -
További szerzők:	Danku Zsuzsa (1984-) (fizikus) Pál Gergő (1987-) (fizikus) Kun Ferenc (1966-) (fizikus)
Pályázati támogatás:	EFOP-3.6.1-16-2016-00022 EFOP K 119967 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
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001-es BibID:	BIBFORM106120
035-os BibID:	(cikkazonosító)112190 (WoS)000881271500010 (Scopus)85129920978
Első szerző:	Batool, Attia
Cím:	Transition from localized to mean field behaviour of cascading failures in the fiber bundle model on complex networks / Attia Batool, Gergő Pál, Zsuzsa Danku, Ferenc Kun
Dátum:	2022
ISSN:	0960-0779
Megjegyzések:	We study the failure process of fiber bundles on complex networks focusing on the effect of the degree of disorder of fibers' strength on the transition from localized to mean field behaviour. Starting from a regular square lattice we apply the Watts-Strogatz rewiring technique to introduce long range random connections in the load transmission network and analyze how the ultimate strength of the bundle and the statistics of the size of failure cascades change when the rewiring probability is gradually increased. Our calculations revealed that the degree of strength disorder of nodes of the network has a substantial effect on the localized to mean field transition. In particular, we show that the transition sets on at a finite value of the rewiring probability, which shifts to higher values as the degree of disorder is reduced. The transition is limited to a well defined range of disorder, so that there exists a threshold disorder of nodes' strength below which the randomization of the network structure does not provide any improvement neither of the overall load bearing capacity nor of the cascade tolerance of the system. At low strength disorder the fully random network is the most stable one, while at high disorder best cascade tolerance is obtained at a lower structural randomness. Based on the interplay of the network structure and strength disorder we construct an analytical argument which provides a reasonable description of the numerical findings.
Tárgyszavak:	Természettudományok Fizikai tudományok kutatási jelentés folyóiratcikk
Megjelenés:	Chaos Solitons & Fractals. - 159 (2022), p. 1-11. -
További szerzők:	Pál Gergő (1987-) (fizikus) Danku Zsuzsa (1984-) (fizikus) Kun Ferenc (1966-) (fizikus)
Pályázati támogatás:	EFOP-3.6.1-16-2016-00022 EFOP K 11996 Egyéb
Internet cím:	Szerző által megadott URL DOI Intézményi repozitóriumban (DEA) tárolt változat
Borító:
Saját polcon: