Atomic scale origin of crack resistance in brittle fracture (Articolo in rivista)

Type
Label
  • Atomic scale origin of crack resistance in brittle fracture (Articolo in rivista) (literal)
Anno
  • 2005-01-01T00:00:00+01:00 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
  • 10.1103/PhysRevLett.95.115501 (literal)
Alternative label
  • Mattoni, A; and Colombo; L and Cleri, F; (2005)
    Atomic scale origin of crack resistance in brittle fracture
    in Physical review letters (Print)
    (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
  • Mattoni, A; and Colombo; L and Cleri, F; (literal)
Pagina inizio
  • 115501 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#url
  • http://prl.aps.org/abstract/PRL/v95/i11/e115501 (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroVolume
  • 95 (literal)
Rivista
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#numeroFascicolo
  • 11 (literal)
Note
  • ISI Web of Science (WOS) (literal)
Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
  • INFM, SLACS, Sardinian Lab Computat Mat Sci, I-09042 Monserrato, CA, Italy; Univ Cagliari, Dipartimento Fis, I-09042 Monserrato, CA, Italy; ENEA, Unita Mat \& Nuove Tecnol, I-00100 Rome, Italy; INFM, Ctr Ric Casaccia, I-00100 Rome, Italy (literal)
Titolo
  • Atomic scale origin of crack resistance in brittle fracture (literal)
Abstract
  • We investigate the physical meaning of the intrinsic crack resistance in the Griffith theory of brittle fracture by means of atomic-scale simulations. By taking cubic SiC as a typical brittle material, we show that the widely accepted identification of intrinsic crack resistance with the free surface energy underestimates the energy-release rate. The strain dependence of the Young modulus and surface energy, as well as allowance for lattice trapping, improve the estimate of the crack resistance. In the smallest scale limit, crack resistance can be fitted by an empirical elastoplastic model. (literal)
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