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Sinuous plastic flow: Mechanics, microstructural basis, and control

Udupa, A and Vandana, AS and Saei, M and Gupta, D and Mann, JB and Viswanathan, K and Sundaram, NK (2021) Sinuous plastic flow: Mechanics, microstructural basis, and control. In: International Journal of Machine Tools and Manufacture .

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Official URL: https://doi.org/10.1016/j.ijmachtools.2021.103728

Abstract

Experimental investigations of large strain deformation processes such as cutting and sliding have primarily involved analysis of process-level variables such as deformation forces and surface finish. Using high speed in situ imaging coupled with finite element simulations, we show that these processes exhibit a rich variety of complex plastic flows. Detailed investigations of one such flow mode, termed sinuous flow and widely prevalent in ductile metals, are presented. Sinuous flow involves unsteady local deformation in the form of repeated material folding arising from grain-level heterogeneity. The microstructural basis of this flow, along with quantitative replication of its kinematics, is demonstrated using finite element simulations. Sinuous flow is ubiquitous in that it occurs in different deformation configurations and in other ductile material systems, like some polymers, which are devoid of any grain-structure. Being associated with a range of deleterious effects, methods for disrupting sinuous flow using surface coatings and kinematic constraints are demonstrated. Implications for our general understanding of machining processes are discussed. © 2021 Elsevier Ltd

Item Type: Journal Article
Publication: International Journal of Machine Tools and Manufacture
Publisher: Elsevier Ltd
Additional Information: The copyright for this article belongs to Elsevier Ltd
Keywords: Kinematics; Machining; Plastic flow, Deformation forces; Deleterious effects; Ductile materials; Experimental investigations; Finite element simulations; Kinematic constraints; Large strain deformation; Local deformations, Deformation
Department/Centre: Division of Mechanical Sciences > Civil Engineering
Division of Mechanical Sciences > Mechanical Engineering
Date Deposited: 12 Jul 2021 05:47
Last Modified: 12 Jul 2021 05:47
URI: http://eprints.iisc.ac.in/id/eprint/68828

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