Cutting Force of Brittle Material : Application of Theoretical Formula of Wood Cutting Force to Orthogonal Cutting of Crack Type

Abstract

The authors have introduced a theoretical calculating formula of cutting forces in orthotropic material of wood by applying the theories of beam on elastic foundation and linear fracture mechanics. In this report, as their formula appears to be applicable to the crack type cutting in which chip is formed by crack extension from tool edge, they employ phenolic laminated sheet, unsaturated polyester resin, cast iron and coal as brittle materials for cutting experiment, and confirm their formula to be of practical use in the brittle material cutting by comparing the experimental results with the theoretical values.