This study was conducted in two parts: Firstly; A theoretically work consisted of-a full- design of the bottom of a moldboard plow, having, a cylindroidal type, using the usual philosophy of the design, then a Ruck-shape was added to the upper free- border, and to the sidelong cutter of the plow. Complete-stresses analysis of the model was conducted, in order to obtain the Von-Mises max stress and Tangential stresses using the finite element-Technique. The model was manufactured according to the specified, dimensions.
Secondly; The aim of the work was to evaluate the performance of the two types of mold board plows (designed and Local), for comparison with two depths (15-20, 21-25 cm) and with three forward speeds (3.484,6.353,9.818 km/hr), through studying their effects on power requirement characteristics (specific resistance of draw-bar, fuel consumption, slipping percentage, power lost with the slippage, & tractive efficiency). Then using of randomized complete block design and then the data was analyzed statistically.
In the following the most important statistical results:
The effect of moldboard plows types on power requirement characteristics: Superlative of the designed moldboard plow significantly on the characteristics (specific resistance, fuel consumption) than the Local moldboard plow.
The effect of interaction between moldboard plows, depths and speeds on the power requirement characteristics, There was no significant effect for this interaction in all power requirement characteristics.