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AES for multiscale localization modeling in granular media

Chen, Qiushi and Andrade, José E. and Samaniego, Esteban (2011) AES for multiscale localization modeling in granular media. Computer Methods in Applied Mechanics and Engineering, 200 (33-36). pp. 2473-2482. ISSN 0045-7825.

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This work presents a multiscale strong discontinuity approach to tackle key challenges in modeling localization behavior in granular media: accommodation of discontinuities in the kinematic fields, and direct linkage to the underlying grain-scale information. Assumed enhanced strain (AES) concepts are borrowed to enhance elements for post-localization analysis, but are reformulated within a recently-proposed hierarchical multiscale computational framework. Unlike classical AES methods, where material properties are usually constants or assumed to evolve with some arbitrary phenomenological laws, this framework provides a bridge to extract evolutions of key material parameters, such as friction and dilatancy, based on grain scale computational or experimental data. More importantly, the phenomenological softening modulus typically used in AES methods is no longer required. Numerical examples of plane strain compression tests are presented to illustrate the applicability of this method and to analyze its numerical performance.

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Additional Information:© 2011 Elsevier B.V. Received 11 October 2010; revised 7 February 2011; accepted 24 April 2011. Available online 11 May 2011. Support for this work is provided by AFOSR Grant No. FA9550-08-1-1092. This support is gratefully acknowledged. The DEM code used in this research is developed by Prof. Kuhn from University of Portland. The authors are grateful to Prof. Kuhn for making the source code available.
Funding AgencyGrant Number
Air Force Office of Scientific Research (AFOSR)FA9550-08-1-1092
Subject Keywords:Assumed enhanced strain (AES) method; Strong discontinuities; Localization; Multiscale; DEM; Granular media
Issue or Number:33-36
Record Number:CaltechAUTHORS:20110803-080949323
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Official Citation:Qiushi Chen, Jose E. Andrade, Esteban Samaniego, AES for multiscale localization modeling in granular media, Computer Methods in Applied Mechanics and Engineering, Volume 200, Issues 33-36, 1 August 2011, Pages 2473-2482, ISSN 0045-7825, DOI: 10.1016/j.cma.2011.04.022. (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:24640
Deposited By: Ruth Sustaita
Deposited On:03 Aug 2011 15:22
Last Modified:03 Oct 2019 02:58

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