Opening of Mode I fractures in geomaterials with rotating particles: small-scale Cosserat continuum approach and its verification

E. Pasternak, A. V. Dyskin, M. Esin, Y. Xu

Research output: Chapter in Book/Conference paperConference paper

1 Citation (Scopus)

Abstract

Geomaterials often contain constituents (e.g., grains, blocks) capable of rotating. Modelling of such geomaterials requires the use of Cosserat continua. A Cosserat continuum possesses characteristic lengths, which distinguish it from the scale-independent classical continuum. For geomaterials with grains these characteristic lengths are of the order of grain size, which restricts the use of continuum modelling to scales (e.g., crack lengths) macroscopic with respect to the grain size and to the Cosserat characteristic lengths. This automatically brings us to the pseudo-Cosserat continuum with constrained microrotations leading to what we call a small-scale Cosserat continuum. We consider a 2D Mode I crack in such a continuum and determine its characteristics, in particular the opening. We then verify this approach using physical modelling and a direct numerical simulation based on discrete element modelling. © Springer International Publishing AG 2017.
Original languageEnglish
Title of host publicationBifurcation and Degradation of Geomaterials with Engineering Applications
EditorsEuripides Papamichos, Panos Papanastasiou, Elena Pasternak, Arcady Dyskin
Place of PublicationNetherlands
PublisherSpringer
Pages547-555
ISBN (Electronic)9783319563978
ISBN (Print)9783319563961
DOIs
Publication statusPublished - 2017
Event11th International Workshop on Bifurcation and Degradation in Geomaterials - Limassol, Cyprus
Duration: 21 May 201725 May 2017

Publication series

NameSpringer Series in Geomechanics and Geoengineering
PublisherSpringer
ISSN (Print)1866-8755

Conference

Conference11th International Workshop on Bifurcation and Degradation in Geomaterials
CountryCyprus
CityLimassol
Period21/05/1725/05/17

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