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Dynamics of fractures in quenched disordered media

Caldarelli, Guido and Cafiero, Raffaele and Gabrielli, Andrea Dynamics of fractures in quenched disordered media. Physical Review E, 57 (4). pp. 3878-3885. ISSN 1539-3755 (1998)

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We introduce a model for fractures in quenched disordered media. This model has a deterministic extremal dynamics, driven by the energy function of a network of springs (Born Hamiltonian). The breakdown is the result of the cooperation between the external field and the quenched disorder. This model can be considered as describing the low-temperature limit for crack propagation in solids. To describe the memory effects in this dynamics and then to study the resistance properties of the system we realized some numerical simulations of the model. The model exhibits interesting geometric and dynamical properties, with a strong reduction of the fractal dimension of the clusters and of their backbone, with respect to the case in which thermal fluctuations dominate. This result can be explained by a recently introduced theoretical tool as a screening enhancement due to memory effects induced by the quenched disorder.

Item Type: Article
Identification Number: 10.1103/PhysRevE.57.3878
Uncontrolled Keywords: PACS: 05.40.+j, 02.50.-r, 62.20.Mk
Subjects: Q Science > QC Physics
Research Area: Economics and Institutional Change
Depositing User: Ms T. Iannizzi
Date Deposited: 24 Feb 2012 13:00
Last Modified: 20 Nov 2013 13:17
URI: http://eprints.imtlucca.it/id/eprint/1173

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