Research Abstracts Online
2008 - March 2009
University of Minnesota Twin Cities
Institute of Technology
Department of Civil Engineering
PI: Andrew Drescher, Associate Fellow
Modeling Processes Involving Soil-Object Interaction
These researchers are using ABAQUS to numerically simulate processes involving an object moving through geomaterials like soil and rock, considering the large, plastic deformations that result when significant object penetration occurs. General interests in such geomechanical processes are the instabilities occurring, the question of whether a steady-state (or periodic) configuration exists, and essential differences between two-dimensional and three-dimensional analysis. The analyses are used to investigate the effects of material type (using various soil constitutive models), material layering, object type and geometry, loading on the object, and friction at the soil-object interface. The researchers are using the results to evaluate the potential for analytic or semi-analytic methods for modeling soil-object interaction.
The group has completed simulations pertaining to a rigid or flexible wheel rolling over (and indenting) soil. They are evaluating the results in the context of evaluation of land damage caused by off-road vehicles operating in various soils. They are also considering the inverse problem, determining soil properties based the deformation induced by a rolling wheel.
James P. Hambleton, Graduate Student