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Abstract

This chapter discusses the fundamentals of plastic deformation and the role of strain and strain rate in sheet metal forming processes. It describes the conditions associated with uniform deformation, the significance of engineering and true strain, the effect of volume constancy on the tensile response of isotropic and anisotropic materials, and how infinitesimal strains or strain rates are used to express and analyze instantaneous deformation and local stain. It also discusses the concept of principal strain and strain paths and explains how to determine, and when to use, equivalent strain and strain rate.

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Eren Billur, A. Erman Tekkaya, Plastic Deformation: Strain and Strain Rate, Sheet Metal Forming: Fundamentals, Edited By Taylan Altan, A. Erman Tekkaya, ASM International, 2012, p 27–32, https://doi.org/10.31399/asm.tb.smff.t53400027

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