Self-Organization and Annealed Disorder in Fracturing Process
- I.N.F.M., Istituto Nazionale di Fisica della Materia, Sezione di Trieste, Scuola Internazionale Superiore di Studi Avanzati/International School for Advanced Study, v.Beirut 2-4, I-34013 Grignano di Trieste TS (Italy)
- Scuola Internazionale Superiore di Studi Avanzati/International School for Advanced Study, v.Beirut 2-4, I-34013 Grignano di Trieste TS (Italy)
- Consiglio Nazionale delle Ricerche, Istituto di Acustica ``O.M. Corbino,`` v.Cassia 1216, I-00189 Roma (Italy)
We show that a vectorial model for inhomogeneous elastic media self-organizes under external stress. An onset of crack avalanches of every duration and length scale compatible with the lattice size is observed. The behavior is driven by the introduction of {ital annealed} {ital disorder}, i.e., by lowering the breaking threshold in the neighborhood of a bond broken by the stress, with a process similar to self-organized criticality. A further comparison with experimental results of acoustic emission (AE), shows that the stability of the elastic potential energy of the system in the AE regime is a sufficient condition for reproducing the algebraic distribution of the energy released during cracks formation. {copyright} {ital 1996 The American Physical Society.}
- OSTI ID:
- 389030
- Journal Information:
- Physical Review Letters, Vol. 77, Issue 12; Other Information: PBD: Sep 1996
- Country of Publication:
- United States
- Language:
- English
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