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Resilient characterization of pavement materials
Author(s) -
Uzan Jacob
Publication year - 1992
Publication title -
international journal for numerical and analytical methods in geomechanics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.419
H-Index - 91
eISSN - 1096-9853
pISSN - 0363-9061
DOI - 10.1002/nag.1610160605
Subject(s) - dilatant , subbase , triaxial shear test , granular material , stress path , poisson's ratio , geotechnical engineering , base course , poisson distribution , finite element method , materials science , mathematics , structural engineering , engineering , composite material , plasticity , asphalt , statistics , shear (geology) , discrete mathematics , general topology , extension topology , topological space
The paper presents an approach for characterizing pavement materials using the modified linear elastic behaviour. The secant modulus of elasticity is expressed in terms of the stress invariants and an expression for the secant Poisson's ratio is derived using path independence of the total work along a closed loading cycle. Triaxial test results of granular base–subbase materials which exhibit strong non‐linear behaviour and dilatancy are analysed and presented. The constitutive law is included in a finite element program and results of pavement analyses are discussed. It is found that the secant Poisson's ratio of granular base materials reaches values between 0·6 and 0·7, indicating a volume increase under high stress ratios. The pavement response predicted using the above material characterization is compatible with non‐destructive test results.