A Force Prediction Model for the Plough Introducing its Geometrical Characteristics and its Comparison with Gorjachkin and Gee Clough Models.

To calculate the effort of the agricultural tools for the ploughing, several mathematical models are proposed. These models generally disregard geometrical characteristic of active surfaces of the working parts. For this reason, tests on channel of traction were carried out to check the validity of two models very frequently used, namely Gorjachkin and Gee Clough. The results showed that for the same form and in identical work conditions, the efforts were definitely different from a model to another. Tests were also carried out on two active forms of surface. The effort calculated using separately one of the two models is the same one for two different surfaces. Whereas the values determined on channel, are completely different from a form to another. From where interest to propose a more universal model connecting the effort with the state of the soil and especially the geometrical characteristics of active surfaces. The model establishes by the modelling method (Buckingham-Vachy) form: