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Journal of Materials Engineering and Performance
Published in: Journal of Materials Engineering and Performance 9/2018

13-08-2018

A Simplified Procedure to Determine Post-necking True Stress–Strain Curve from Uniaxial Tensile Test of Round Metallic Specimen Using DIC

Authors: Surajit Kumar Paul, Satish Roy, S. Sivaprasad, S. Tarafder

Published in: Journal of Materials Engineering and Performance | Issue 9/2018

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Abstract

Triaxial state of stress is usually generated in the necked zone because of neck geometry, and as a consequence proper correction of true tensile stress–strain curve after necking is mandatory. Various correction factors like Bridgman, Davidenkov and Spiridonova, Siebel and Schwaigere are available in the published literature to calculate true stress from mean axial stress. Similarly true strains can be calculated from the minimum diameters of the round specimen in the necked region for various true stress levels. But experimental determination of correction factors and minimum diameters of the round specimen in the necked region is a cumbersome task. This investigation shows a simplified procedure to determine true strains and the correction factors from digital image correlation-based local strain measurement in the necked region. The present procedure is validated by experimental results of rail steel.
previous article Fatigue and Fracture Behavior of Induction-Hardened and Superimposed Mechanically Post-treated Steel Surface Layers
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Metadata
Title
A Simplified Procedure to Determine Post-necking True Stress–Strain Curve from Uniaxial Tensile Test of Round Metallic Specimen Using DIC
Authors
Surajit Kumar Paul
Satish Roy
S. Sivaprasad
S. Tarafder
Publication date
13-08-2018
Publisher
Springer US
Published in
Journal of Materials Engineering and Performance / Issue 9/2018
Print ISSN: 1059-9495
Electronic ISSN: 1544-1024
DOI
https://doi.org/10.1007/s11665-018-3566-5

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