ANALYSIS OF THE METAL CUTTING PROCESS IN TERMS OF YIELD SURFACE TOPOLOGY.

Barney E. Klamecki

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

In order to describe the deformation in the workpiece in metal cutting, a plastic yield surface was constructed which exhibited observed metal deformation behavior and metal cutting process characteristics. A von Mises type yield surface was used which was generalized to include strain softening and progression to a plane stress state. The metal cutting process was represented on the yield surface as a trajectory which moved from the strain hardening to the strain weakening region. The shear zone geometric characteristics were included by extending the yield surface to a plane stress state. When the change in shear zone stress state was represented by a continuous trajectory on the yield surface, the possibility of different regions of the shear zone being in different strain hardening conditions resulted in a reversal of strain increment direction across the shear zone. This strain direction reversal can explain the nonuniform deformation structure observed on metal cutting chips.

Original languageEnglish (US)
Title of host publicationManufacturing Engineering Transactions
PublisherSME, North American Manufacturing Research Inst
Pages375-378
Number of pages4
ISBN (Print)0872631869
StatePublished - Dec 1 1985

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