Journal
GEOMECHANICS AND GEOENGINEERING-AN INTERNATIONAL JOURNAL
Volume 13, Issue 3, Pages 198-216Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/17486025.2018.1435912
Keywords
Cone-penetration test; discrete-element modelling; granular material; triaxial test; porosity; coordination number
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Funding
- TUBITAK [111M435]
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This paper explores how the discrete-element method (DEM) was found to play an increasingly important role in cone penetration test (CPT) where continuum-mechanics-based analysis tools are insufficient. We investigated several crucial features of CPT simulations in the two-dimensional DEM. First, the microparameters (stiffness and friction) of discrete material tailored to mimic clean, saturated sand, which is used in cone-penetration tests, were calibrated by curve-fitting drained triaxial tests. Then, three series of cone-penetration simulations were conducted to explore (1) top boundary conditions, (2) reasonable size of discrete particles at different initial porosities, and (3) limit initial porosity of the model for a balance between accurate representation and computational efficiency. Further, we compared the cone-penetration resistance obtained in the laboratory and numerical simulations for the range of relative densities.
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