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Titolo:
A two-phase model for compaction and damage 1. General Theory
Autore:
Bercovici, D; Ricard, Y; Schubert, G;
Indirizzi:
Ecole Normale Super Lyon, Lab Sci Terre, F-69364 Lyon 07, France Ecole Normale Super Lyon Lyon France 07 i Terre, F-69364 Lyon 07, France Univ Calif Los Angeles, Dept Earth & Space Sci, Los Angeles, CA 90095 USA Univ Calif Los Angeles Los Angeles CA USA 90095 Los Angeles, CA 90095 USA Univ Hawaii, Dept Geol & Geophys, Honolulu, HI 96822 USA Univ Hawaii Honolulu HI USA 96822 Geol & Geophys, Honolulu, HI 96822 USA
Titolo Testata:
JOURNAL OF GEOPHYSICAL RESEARCH-SOLID EARTH
fascicolo: B5, volume: 106, anno: 2001,
pagine: 8887 - 8906
SICI:
0148-0227(20010510)106:B5<8887:ATMFCA>2.0.ZU;2-V
Fonte:
ISI
Lingua:
ENG
Soggetto:
DEFORMABLE POROUS-MEDIA; SURFACE-TENSION; CONSISTENT MODEL; MELT SEGREGATION; MAGMA MIGRATION; MANTLE FLOW; 2-PHASE; SOLIDIFICATION; CIRCULATION; EQUATIONS;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
70
Recensione:
Indirizzi per estratti:
Indirizzo: Bercovici, D Yale Univ, Dept Geol & Geophys, POB 208109, New Haven, CT 06520 USA Yale Univ POB 208109 New Haven CT USA 06520 ven, CT 06520 USA
Citazione:
D. Bercovici et al., "A two-phase model for compaction and damage 1. General Theory", J GEO R-SOL, 106(B5), 2001, pp. 8887-8906

Abstract

A theoretical model for the dynamics of a simple two-phase mixture is presented. A classical averaging approach combined with symmetry arguments is used to derive the mass, momentum, and energy equations for the mixture. Thetheory accounts for surficial energy at the interface and employs a nonequilibrium equation to relate the rate of work done by surface tension to therates of both pressure work and viscous deformational work. The resulting equations provide a basic model for compaction with and without surface tension. Moreover, use of the full nonequilibrium surface energy relation allows for isotropic damage, i.e., creation of surface energy through void generation and growth (e.g., microcracking), and thus a continuum description of weakening and shear localization. Applications to compaction, damage, andshear localization are investigated in two companion papers.

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Documento generato il 08/04/20 alle ore 09:05:58