modeling of six openers for seeding machines, cross-shaped, t-inverse, u-shaped, v-shaped, v-shaped with two plates and tulip-shaped

The use of cultivation techniques that can properly prepare the seed bed and plant the seeds at an almost uniform depth has become necessary more than ever. in this research, the plane sitting test was used for modeling. in the simulation, the soil was considered as an elastic plastic body with two criteria mohr-coulomb and drucker-prager and the influence of the tiller as a compressive force. this experiment was implemented using strip plots in the form of a completely randomized block design with four replications in the crop year 1401-1400. the design of the tools was done using solidworks software and the modeling was done using abaqus software. the general purpose of this research was to introduce the best tiller with suitable planting arrangements for direct cultivation machinery in iran. the results of modeling with abaqus software showed that the drucker-prager behavior model with a correlation coefficient of 0.93% was in better agreement than the mohr-coulomb model and the amount of stress and displacement in the layers close to the loading level is greater and moving towards the lower layers. this value decreases. the overall results showed that the cruciferous cultivar has the most optimal type of cultivation arrangement.