Abstract
The tools with artificially restricted tool-chip contact length have a strong tendency to produce a complicated plastic flow ahead of the rake face as far as the restricted length is shorter than the natural tool-chip contact length. The paper stresses the importance of the plastic field for better understanding of the machining characteristics with the reduced contact tools.
By applying the theory of plasticity, the plastic field is found to be composed of one centered fan and two straight slip line fields.
The associated fields of stress and velocity with the slip line construction are found to satisfy all boundary conditions. Thus the slip line field proposed in the paper is one of the Mises solution.
The plastic deformation during chip forming process is obtained analytically as a deformed pattern of originally square grids printed on the side of work piece. The analytical pattern is verified to be in good agreement with the pattern actually produced in experiments.
