Abstract
This paper presents a second-order work analysis in application to geotechnical problems by using a novel effective multiscale approach. To abandon complicated equations involved in conventional phenomenological models, this multiscale approach employs a micromechanically-based formulation, in which only four parameters are involved. The multiscale approach makes it possible a coupling of the finite element method (FEM) and the micromechanically-based model. The FEM is used to solve the boundary value problem (BVP) while the micromechanically-based model is utilized at the Gauss point of the FEM. Then, the multiscale approach is used to simulate a three-dimensional triaxial test and a plain-strain footing. On the basis of the simulations, material instabilities are analyzed at both mesoscale and global scale. The second-order work criterion is then used to analyze the numerical results. It opens a road to interpret and understand the micromechanisms hiding behind the occurrence of failure in geotechnical issues.
Original language | English |
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Pages (from-to) | 1230-1250 |
Number of pages | 21 |
Journal | International Journal for Numerical and Analytical Methods in Geomechanics |
Volume | 43 |
Issue number | 6 |
DOIs | |
Publication status | Published - 25 Apr 2019 |
Keywords
- failure
- granular materials
- instability
- micromechanics
- multiscale approach
- second-order work
ASJC Scopus subject areas
- Computational Mechanics
- Materials Science(all)
- Geotechnical Engineering and Engineering Geology
- Mechanics of Materials