Cap Plasticity Model for Thawing Soil


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by Sally Shoop, P.E., (A.M.ASCE), Research Civil Engineer; U.S. Army Corps of Engineer, Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, NH 03755,
Rosa Affleck, (A.M.ASCE), Research Civil Engineer; U.S. Army Corps of Engineer, Cold Regions Research and Engineering Laboratory, 72 Lyme Road, Hanover, NH 03755,



Document Type: Proceeding Paper

Part of: Calibration of Constitutive Models:

Abstract: A material model for soft, wet soil was generated to simulate the deformation behavior of thawing soil under vehicle loading on paved and unpaved roads. The soil modeled, a frost-susceptible fine sand called Lebanon Sand, was subjected to a full suite of saturated and unsaturated triaxial testing duplicating conditions experienced during large-scale freeze—thaw testing. Material parameters were generated for a capped Drucker—Prager plasticity model with hardening. These were calibrated in triaxial test simulations using the commercial finite element code ABAQUS. The material model was then implemented in several three-dimensional finite element simulations for validation and robustness.

Subject Headings: Soil properties | Plasticity | Triaxial tests | Saturated soils | Three-dimensional models | Unsaturated soils | Soil deformation | Simulation models | Frozen soils | Middle East | Lebanon

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