Analysis of the stress affecting the cutting knives locally manufactured in the moldboard plough with the measurement of some of the indicators studied

Abstract

The study was conducted in a theoretical part, using the finite element method and the main stresses and safety coefficients were adopted on the sliding and disk knives, which are among the auxiliary parts in the work of the moldboard plough. The second part is the field evaluation of performance evaluation of the plough through three factors: cutting knives the sliding knife, the disk knife and without a knife, two levels of moisture content 9.73 % and 16.22 %, and two ploughing depths 15-20 and 25-30 cm. The following indicators were studied: drawbar capacity, fuel consumption, and percentage For slippage, vertical deviation and lateral deviation, the results showed that the subtractive plough without the cutting knife recorded the highest values of the drawbar capacity and vertical deviation, however the plough with sliding knife achieved the lowest values for the indicators which mentioned, the moisture content 16.22% recorded the lowest significant value for each of the drawbar ability and the percentage of slippage and deviation Lateral. Increaseing plough depths achieved the highest value of traction power, fuel consumption, percentage of slippage and lateral deviation, and the overlap between the plough with the sliding cutting knife and the ploughing depth of 15-20 cm achieved the least significant value for the traction ability, and also the overlap for the depth of 15-20 cm with the disk knife plough had the lowest fuel consumption.