Studies of plow shape (IV)

Studies on Soil Cutting and Pulverization (2)

Abstract

The auther had done the experimental studies of the two dimensional cutting of soil. The metal cutting theory or the ordinary soil mechanics had not been able to explain the experimental results.
In this paper the theoretical analysis of the soil cutting have done by solving the plastic equiliblium equation of soil with coulomb'ian boundary condition. Negrecting the weight of soil and using the characteristric of the slip surface, fundamental dif ferential equation (9) have been reduced to 2nd form of Fredholm's integral equation (21) and solved by suecesive substitution method. The results of the analysis confirm the phenomena of experiment, such as the minimum cutting resistance exist at about α=15°(Fig. 5), the shape of the slip surface (Fig 4) etc.