Finite element modelling of the interaction of the cutting edge of tillage implements with soil

Finite element modelling was undertaken to study the effect of the cutting edge geometry of tillage implements and to compare the results with previously measured tillage forces, soil failure patterns and soil movement below the tillage depth. Two-dimensional finite element modelling was compared with tests conducted using 400 mm wide experimental sweeps under the controlled conditions of a tillage test track (large outside continuous soil bin) and in the field. Corresponding tests were also conducted using a glass-sided soil bin to help quantify the interactions between the soil and tillage implements. The results showed the important role the value of Poisson's ratio has on the tillage action and that the finite element modelling technique can be used to predict the effect of various cutting edge geometries on tillage forces and soil movement around the cutting edge. (C) 1999 Silsoe Research Institute.