Planes Vila, AntoniRoch i Carceller, Carles2018-10-092018-10-092018-06https://hdl.handle.net/2445/125203Treballs Finals de Grau de Física, Facultat de Física, Universitat de Barcelona, Curs: 2018, Tutor: Antoni PlanesBreakdown phenomena can be understood as a phase transition that occur in athermal systems constituted of many interacting elements governed by the interplay between an external driving force and disorder. Representative examples are magnets driven by a magnetic field out of equilibrium and ruptures, in a stress driven fiber bundle. In this work we analyze critical behaviors of both cases within the mean field approach. The magnetic case has been compared with the Weiss model for a ferromagnet with no disorder at finite temperature. Finally, in the case of the fiber bundle model we show the existence of certain conditions for criticality to occur5 p.application/pdfengcc-by-nc-nd (c) Roch, 2018http://creativecommons.org/licenses/by-nc-nd/3.0/es/Transformacions de fase (Física estadística)Caos (Teoria de sistemes)Treballs de fi de grauPhase transformations (Statistical physics)Chaotic behavior in systemsBachelor's thesesinfo:eu-repo/semantics/bachelorThesisinfo:eu-repo/semantics/openAccess