Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Dinakar Sagapuram"'
Publikováno v:
Materials Research Letters, Vol 8, Iss 9, Pp 328-334 (2020)
Shear banding is an important deformation and failure mechanism in metallic systems, especially at high-rate straining. Dynamic recrystallization was often reported to account for the refined microstructure of shear bands but rarely confirmed using d
Externí odkaz:
https://doaj.org/article/1ec70a6447684a1b9301c0f89bcb5f7b
Autor:
Kerry Wang, Parth Dave, Abhishek Hanchate, Dinakar Sagapuram, Gautam Natarajan, Satish T.S. Bukkapatnam
Publikováno v:
Manufacturing Letters. 33:893-901
Publikováno v:
Materials Research Letters, Vol 8, Iss 9, Pp 328-334 (2020)
Shear banding is an important deformation and failure mechanism in metallic systems, especially at high-rate straining. Dynamic recrystallization was often reported to account for the refined microstructure of shear bands but rarely confirmed using d
Autor:
Dinakar Sagapuram, Gan Feng
Publikováno v:
CIRP Annals. 69:77-80
An experimental study of the “size effect” in machining – substantial increase in the specific cutting energy with decrease in chip size – is described. An instrumented ultramicrotomy technique employing “ideally” sharp glass and diamond
Autor:
D. D. Mallick, Dinakar Sagapuram, Bryan T. Bosworth, K.T. Ramesh, J. Parker, Vignesh Kannan, M. Zhao, Mark A. Foster
Publikováno v:
Experimental Mechanics. 59:611-628
We describe a laser-launched micro-flyer apparatus designed for spall strength measurement. The launcher uses a single pulse from a pulsed laser that is stretched in time to nominally 20 nanoseconds using an optical ring cavity, while inexpensive mul
Publikováno v:
CIRP Annals. 68:45-48
We study the dynamics of flow instability and shear localization in cutting using direct high-speed imaging and low melting point alloy as a model material system. The onset of instability and departure from steady laminar flow is triggered by nuclea
Autor:
Koushik Viswanathan, Dinakar Sagapuram
Publikováno v:
Extreme Mechanics Letters. 25:27-36
We study material flow in the vicinity of single shear bands in high strain-rate (10(4) -10(5) per second) deformation of metals. Shear band plastic flow, in three different materials, is shown to resemble unsteady planar Couette flow (Stokes first p
Autor:
Mathew Kuttolamadom, Michael Liu, Jyhwen Wang, Bruce Tai, Samuel Noynaert, Dinakar Sagapuram, Marian Kennedy
Publikováno v:
2018 ASEE Annual Conference & Exposition Proceedings.
Autor:
Anirudh Udupa, Koushik Viswanathan, Dinakar Sagapuram, Rachid M'Saoubi, James B. Mann, Srinivasan Chandrasekar, Tatsuya Sugihara
Publikováno v:
Journal of Manufacturing Science and Engineering. 142
The mechanics of large-strain deformation in cutting of metals is discussed, primarily from viewpoint of recent developments in in situ analysis of plastic flow and microstructure characterization. It is shown that a broad range of deformation parame
Publikováno v:
Volume 1: Additive Manufacturing; Advanced Materials Manufacturing; Biomanufacturing; Life Cycle Engineering; Manufacturing Equipment and Automation.
The deformation conditions in machining of metals and alloys offer a unique route for materials processing with remarkable advantages over conventional deformation processes. The intense shear strain and high strain-rates in machining can be applied