On the stability of plastic flow in cutting of metals Academic Article

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.

authors

• Sagapuram, Dinakar

published proceedings

• CIRP ANNALS-MANUFACTURING TECHNOLOGY

author list (cited authors)

• Viswanathan, K., Udupa, A., Yeung, H. o., Sagapuram, D., Mann, J. B., Saei, M., & Chandrasekar, S.

citation count

• 22

complete list of authors

• Viswanathan, Koushik||Udupa, Anirudh||Yeung, Ho||Sagapuram, Dinakar||Mann, James B||Saei, Mojib||Chandrasekar, Srinivasan

publication date

• January 2017

publisher

• Elsevier  Publisher

published in

• CIRP annals  Journal

keywords

• Deformation
• Machining
• Rehbinder Effect

Digital Object Identifier (DOI)

• 10.1016/j.cirp.2017.04.027

start page

• 69

end page

• 72

volume

• 66

issue

• 1

URL

• http://dx.doi.org/10.1016/j.cirp.2017.04.027