Welcome to the new version of CaltechAUTHORS. Login is currently restricted to library staff. If you notice any issues, please email coda@library.caltech.edu
Published August 1, 2011 | public
Journal Article

AES for multiscale localization modeling in granular media


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.

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.

Additional details

August 22, 2023
October 23, 2023