Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5466938 | CIRP Annals - Manufacturing Technology | 2017 | 4 Pages |
Abstract
We examine large-strain deformation and unsteady flow modes in cutting using high-speed imaging. For metals which exhibit large workability and strain hardening, the commonly assumed laminar flow is inherently unstable. Instead, the cutting is characterized by sinuous flow, with large-amplitude folding, that is triggered by a plastic buckling instability linked to the material microstructure. A microstructure basis is also suggested for shear band flow in high-speed cutting, with the band region showing a fluid-like characteristic with very small viscosity. Mechanochemical Rehbinder effects, long reported in cutting of metals, are found to be closely linked to the unsteady flow modes.
Keywords
Related Topics
Physical Sciences and Engineering
Engineering
Industrial and Manufacturing Engineering
Authors
Koushik Viswanathan, Anirudh Udupa, Ho Yeung, Dinakar Sagapuram, James B. Mann, Mojib Saei, Srinivasan Chandrasekar,