Electrical behaviour of a single crack in a conductor and exponential laws for conductivity in micro cracked solids (Articolo in rivista)

Type

• Articolo in rivista (Classe)
• Prodotto della ricerca (Classe)

Label

• Electrical behaviour of a single crack in a conductor and exponential laws for conductivity in micro cracked solids (Articolo in rivista) (literal)

Anno

• 2007-01-01T00:00:00+01:00 (literal)

Alternative label

• Giordano, S (2007)
  Electrical behaviour of a single crack in a conductor and exponential laws for conductivity in micro cracked solids
  in International journal of applied electromagnetics and mechanics
  (literal)

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• Giordano, S (literal)

Pagina inizio

• 1 (literal)

Pagina fine

• 19 (literal)

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• 26 (literal)

Rivista

• International journal of applied electromagnetics and mechanics (Rivista)

Note

• ISI Web of Science (WOS) (literal)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni

• Univ Cagliari, Dept Phys, Sardinian Lab Computat Mat Sci, INFM CNR, I-09042 Monserrato, CA, Italy (literal)

Titolo

• Electrical behaviour of a single crack in a conductor and exponential laws for conductivity in micro cracked solids (literal)

Abstract

• In this paper we analyse the electrical effects of the presence of cracks in solid conductors. We have studied such problematic from different points of view. Firstly, we have analytically evaluated the behaviour of the electrical field near a crack in an isotropic solid where a uniform current density is flowing, drawing a comparison with the behaviour of the well known stress and strain tensor fields in the analogue elastic problem. This Computation has been made with a slit-crack (two-dimensional field analysis) and with a circular crack (three-dimensional field analysis). So, in order to quantify the spatial fluctuations of the local electric field around the crack we have numerically found the density of states for the field showing that it exhibit sharp peaks and abrupt changes in the slope at certain critical points which are analogous to van Hove singularities in the density of states for phonons and electrons in solids. Finally, we have performed a theoretical analysis of the conductivity of a microcracked solid. The distribution of cracks in the solid follows a given orientational distribution, which modify the conduction properties of the overall material. In particular, we have shown that the conductivity depends exponentially on the cracks density and on the size of each crack embedded in the medium. (literal)

Prodotto di

• Teoria e modeling computazionale di materiali e processi per le nanoscienze (MD.P06.014.001) (Modulo)

Autore CNR

• Stefano Giordano (Persona)

Insieme di parole chiave

• Keywords of "Electrical behaviour of a single crack in a conductor and exponential laws for conductivity in micro cracked solids" (Insieme di parole chiave)

Incoming links:

Autore CNR di

• Stefano Giordano (Persona)

Prodotto

• Teoria e modeling computazionale di materiali e processi per le nanoscienze (MD.P06.014.001) (Modulo)

Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#rivistaDi

• International journal of applied electromagnetics and mechanics (Rivista)

Insieme di parole chiave di

• Keywords of "Electrical behaviour of a single crack in a conductor and exponential laws for conductivity in micro cracked solids" (Insieme di parole chiave)