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Title: Development of a granular media model for finite element analysis
Authors: Smith, Donald M.
Peters, John F.
Rollings, Raymond S.
Keywords: Base course
Finite elements
Pavement analysis
Constitutive model
Granular material
Finite element method
Flexible pavements
Pavement design
Publisher: Geotechnical and Structures Laboratory (U.S.)
Engineer Research and Development Center (U.S.)
Series/Report no.: ERDC/GSL TR ; 01-3.
Description: Technical Report
Abstract: Today's pavement design calls for more emphasis on pavement performance prediction. This is a far more complex task than traditional designs that strive to provide safe thickness and specifications for the material. Modem computational mechanics provide application tools to deal with this new challenge, provided material models are created that predict cumulative deformations under traffic loading. This paper describes an ongoing research effort to create material models for granular base course material that may be implemented within general-purpose finite element computer programs. The model was evolved from a mechanistic interpretation of endochronic theory, which creates a modular system that can accommodate plasticity, visco-elasticity/plasticity, and damage within a single modeling format. The performance of the model is illustrated with the analysis of permanent deformations in a flexible pavement caused by repeated tire loads.
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