Abstract
The shapes of the entrance and exit slip-lines to the plastic flow zones in a metal-cutting process are obtained by strain etching the polished section of a partly formed chip, which was produced in an incremental cutting operation. The results are compared with the slip-line field solutions of Kudo, for cutting with chip curl. The shapes of the exit boundaries to the primary and secondary flow zones, which are situated in approximately non-hardening metal, show good general agreement with Kudo's perfect plasticity model.
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