On the stability of plastic flow in cutting of metals | Academic Article individual record
abstract

© 2017 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.

author list (cited authors)
Viswanathan, K., Udupa, A., Yeung, H. o., Sagapuram, D., Mann, J. B., Saei, M., & Chandrasekar, S.
publication date
2017
publisher
Elsevier BV Publisher
published in
CIRP Annals Journal
keywords
  • Rehbinder Effect
  • Machining
  • Deformation
citation count

14