Modelling the Catastrophic Shear Type of Chip When Machining Stainless Steel

Abstract
When machining materials such as stainless steel and titanium the removed chip is characterized by a serrated (saw-tooth) outer surface and large cyclic variations in macrostrain within the chip. The present paper presents a model for the process producing such chips. The model is shown to represent accurately experimental results derived from cine films and photomicrographs of the chip formation process obtained when maching stainless steel.