On the estimation of shear plane angle and mean strain rate in two-dimensional machining

Abstract EN

This paper is concerned with two-dimensional steady state machining process in which the direction of motion of the tool is perpendicular to its cuttng edge.

Since plastic deformation is generally confined in a narrow zone of intense shear under normal cutting conditions, a simple shear plane model is assumed in the theoretical analysis.

It is shown that, for most engineering materials a region below the Shear Plane is bought to yield Point by lhe cutling action, while the chip material is non-plastic due to its elevated yield stress.

The theoretical model is used to estimate the mean thickness of the shear zone and the associated mean strain rate , a knowledge of which is essential for checking the validity of the shear angle formula.