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Characterization of random fields and their impact on the mechanics of geosystems at multiple scales

Chen, Qiushi and Seifried, Andrew and Andrade, José E. and Baker, Jack W. (2012) Characterization of random fields and their impact on the mechanics of geosystems at multiple scales. International Journal for Numerical and Analytical Methods in Geomechanics, 36 (2). pp. 140-165. ISSN 0363-9061. http://resolver.caltech.edu/CaltechAUTHORS:20120217-111405018

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Abstract

The behavior of particulate media, such as sands, is encoded at the granular-scale and hence methods for upscaling such behavior across relevant scales of interest—from granular-scale (~1 mm) to field-scale (>1m)—are needed to attain a more accurate prediction of soil behavior. Multi-scale analysis is especially important under extreme conditions, such as strain localization, penetration, or liquefaction, where the classical constitutive description may no longer apply. In this paper, internally consistent probabilistic models for undrained shear strength and Young's modulus are developed at multiple scales, and incorporated into a simulation framework where refinement of the material description to finer scales is pursued only as necessary. This probabilistic simulation approach is then coupled with the finite element method. Numerical examples are presented to show how the performance of the geosystem is influenced by taking into account multi-scale random fields.


Item Type:Article
Related URLs:
URLURL TypeDescription
http://dx.doi.org/10.1002/nag.999 DOIUNSPECIFIED
http://onlinelibrary.wiley.com/doi/10.1002/nag.999/abstractPublisherUNSPECIFIED
Additional Information:© 2010 John Wiley & Sons, Ltd. Received 30 July 2009; Revised 12 May 2010; Accepted 15 October 2010. Published online 30 December 2010. Support for this work is provided by NSF grant numbers CMMI 0726908 and CMMI 0727121. This support is gratefully appreciated. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.
Funders:
Funding AgencyGrant Number
NSFCMMI 0726908
NSFCMMI 0727121
Subject Keywords:material inhomogeneities; random field theory; multi-scale analysis; FEM
Record Number:CaltechAUTHORS:20120217-111405018
Persistent URL:http://resolver.caltech.edu/CaltechAUTHORS:20120217-111405018
Official Citation:Chen, Q., Seifried, A., Andrade, J. E. and Baker, J. W. (2012), Characterization of random fields and their impact on the mechanics of geosystems at multiple scales. International Journal for Numerical and Analytical Methods in Geomechanics, 36: 140–165. doi: 10.1002/nag.999
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:29363
Collection:CaltechAUTHORS
Deposited By: Tony Diaz
Deposited On:22 Feb 2012 00:49
Last Modified:23 Aug 2016 10:10

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