DEM simulation of stress transmission under agricultural traffic Part 3: Evaluation with field experiment

TY - JOUR

T1 - DEM simulation of stress transmission under agricultural traffic Part 3

T2 - Evaluation with field experiment

AU - De Pue, Jan

AU - Lamandé, Mathieu

AU - Schjønning, Per

AU - Cornelis, Wim M.

PY - 2020

Y1 - 2020

N2 - In a concurrent paper, we compared a continuum model and a discrete element method (DEM) model in simulating stress transmission in soil under a wheel. Here, those models are evaluated with measurements of vertical normal stress (σz) under the wheels of a tractor-slurry spreader setup. It was found that the variation in the measured σz could be explained by the heterogeneous stress distribution in our structured soil, similar to what is observed in the DEM simulation. Furthermore, comparison of the continuum and DEM model showed that the lack of horizontal forces and dynamic load transfer at the boundary condition in the continuum model lead to a systematic underestimation of the measured σz. Traction and drawbar forces have a significant impact on the stress state under a wheel. The continuum model and its boundary conditions should be modified to include these forces accurately.

AB - In a concurrent paper, we compared a continuum model and a discrete element method (DEM) model in simulating stress transmission in soil under a wheel. Here, those models are evaluated with measurements of vertical normal stress (σz) under the wheels of a tractor-slurry spreader setup. It was found that the variation in the measured σz could be explained by the heterogeneous stress distribution in our structured soil, similar to what is observed in the DEM simulation. Furthermore, comparison of the continuum and DEM model showed that the lack of horizontal forces and dynamic load transfer at the boundary condition in the continuum model lead to a systematic underestimation of the measured σz. Traction and drawbar forces have a significant impact on the stress state under a wheel. The continuum model and its boundary conditions should be modified to include these forces accurately.

KW - Soil compaction

KW - Terramechanics

KW - Traction

UR - http://www.scopus.com/inward/record.url?scp=85080052400&partnerID=8YFLogxK

U2 - 10.1016/j.still.2020.104606

DO - 10.1016/j.still.2020.104606

M3 - Journal article

AN - SCOPUS:85080052400

SN - 0167-1987

VL - 200

JO - Soil and Tillage Research

JF - Soil and Tillage Research

M1 - 104606

ER -