General yield conditions in a plasticity analysis of soil-wheel interaction

Nowatzki, Edward A.; Karafiath, Leslie L.

doi:10.1016/0022-4898(74)90003-2

Cited by 12 publications

(2 citation statements)

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“…Nevertheless, a rich vein of literature has built up on the resistance to wheels driven over sand and soft soils (e.g. [1,3,[8][9][10][11][12][13][14][15][16]).…”

Section: Introductionmentioning

confidence: 99%

“…Collins' construction allows for contacts that are not necessarily small and has received some support from numerical computations [15], but was proposed for cohesive material neglecting gravity. The two-part structure of the flow pattern is, however, essential for a consistent description of the forces and torques acting on the cylinder, and is reminiscent of experiments and models of wheels rolling over sand [9][10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

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Rolling resistance of shallow granular deformation

2017

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Experiments are conducted to measure the resistance experienced by light cylinders rolling over flat beds of granular media. Sand and glass spheres are used for the beds. The trajectories of the rolling cylinders are determined through optical tracking, and velocity and acceleration data are inferred through fits to these trajectories. The rolling resistance is dominated by a velocity-independent component, but a velocity-dependent drag exceeding the expected strength of air drag is also observed. The results are compared to a theoretical model based on a cohesionless Mohr-Coulomb rheology for a granular medium in the presence of gravity. The model idealizes the flow pattern underneath the rolling cylinder as a plastically deforming zone in front of a rigidly rotating plug attached to the cylinder, as proposed previously for cylinders rolling on perfectly cohesive plastic media. The leading-order, rate-independent rolling resistance observed experimentally is well reproduced by the model predictions.

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“…Nevertheless, a rich vein of literature has built up on the resistance to wheels driven over sand and soft soils (e.g. [1,3,[8][9][10][11][12][13][14][15][16]).…”

Section: Introductionmentioning

confidence: 99%