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Equivalent continuum modeling for non‐linear wave propagation in jointed media
Author(s) -
Vorobiev Oleg,
Antoun Tarabay
Publication year - 2010
Publication title -
international journal for numerical methods in engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.421
H-Index - 168
eISSN - 1097-0207
pISSN - 0029-5981
DOI - 10.1002/nme.3094
Subject(s) - stress wave , wave propagation , mechanics , relaxation (psychology) , stress relaxation , stress (linguistics) , geotechnical engineering , structural engineering , materials science , geology , physics , classical mechanics , engineering , optics , psychology , social psychology , linguistics , philosophy , kinetics
This paper describes a methodology to build equivalent continuum (ECC) models to represent jointed media for non‐linear wave propagation. In the present work, we study the response of randomly jointed rock media both to quasi‐static and dynamic loadings. We have found that, unlike in the quasi‐static case where no relaxation is observed, during dynamic loading, the deviatoric stress drops in the plastic wave after reaching its peak. Such stress relaxation phenomenon is calculated in jointed media, although the model used for intact rock blocks is rate‐independent. This is a strong indication that EC models for jointed rock should include some rate‐dependence when used in wave propagation simulations. Copyright © 2010 John Wiley & Sons, Ltd.