Preliminary Study on the Onset of Necking Detection Using DIT in Tensile Tests

David Palomo; Andrés J. Martínez-Donaire; José Andrés López Fernández; Marcos Borrego Puche; Carpoforo Vallellano

doi:10.4028/p-ad49jb

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HomeKey Engineering MaterialsKey Engineering Materials Vol. 926Preliminary Study on the Onset of Necking...

Preliminary Study on the Onset of Necking Detection Using DIT in Tensile Tests

Abstract:

The experimental detection of localized necking is an important issue in sheet metal forming. Today, the most common and extended techniques are strain-based methods using digital image correlation (DIC). The present work discuses a thermal methodology to detect the onset of necking in metals based on the analysis of the temperature gradient using digital infrared thermography (DIT). A series of tensile tests of H240LA-O3 high-strength steel of 1.2mm thickness is analysed using DIC and DIT techniques. It is proposed that necking initiates when the temperature difference at a reference distance from the necking point reaches a critical value, which allows identifying the necking time and estimating the limit strains from the visible images using circle grid analysis.

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Periodical:

Key Engineering Materials (Volume 926)

Pages:

710-716

DOI:

https://doi.org/10.4028/p-ad49jb

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Online since:

July 2022

Authors:

David Palomo, Andrés J. Martínez-Donaire*, José Andrés López Fernández, Marcos Borrego Puche, Carpoforo Vallellano

Keywords:

Digital Infrared Thermography, Local Necking, Sheet Metal Forming, Tensile Test

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* - Corresponding Author

References

[1] G. Taylor, H. Quinney. The latent energy remaining in a metal after cold working. Proc R Soc Lond 143 (1934) 307–326.

DOI: 10.1098/rspa.1934.0004

Google Scholar

[2] M. San Juan, O. Martín, F.J. Santos, P. De Tiedra, F. Daroca, R. López. Application of thermography to analyse the influence of the deformation rate in the forming process. Procedia engineering 63 (2013) 821-828.

DOI: 10.1016/j.proeng.2013.08.233

Google Scholar

[3] B.A. Behrens, A. Chugreev, F. Bohne, R. Lorenz. Approach for modelling the Taylor-Quinney coefficient of high strength steels. Procedia Manufacturing 29 (2019) 464-471.

DOI: 10.1016/j.promfg.2019.02.163

Google Scholar

[4] A.J. Martínez-Donaire, F.J. García-Lomas, C. Vallellano, New approaches to detect the onset of localized necking in sheets under through-thickness strain gradients, Materials & Design 57 (2014) 135-145.

DOI: 10.1016/j.matdes.2014.01.012

Google Scholar

[5] A. Chrysochoos, H. Louche. An infrared image processing to analyse the calorific effects accompanying strain localisation. International Journal of Engineering Science 38 (2000) 1759-1788.

DOI: 10.1016/s0020-7225(00)00002-1

Google Scholar

[6] M. Maj, W. Oliferuk. Analysis of plastic strain localization on the basis of strain and temperature fields. Archives of metallurgy and materials 57 (2012) 1111-1116.

DOI: 10.2478/v10172-012-0124-2

Google Scholar

[7] G.C. Soares, N.I. Vázquez Fernández, M. Hokka. Thermomechanical Behaviour of Steels in Tension Studied with Synchronyzed Full-Field deformation and Temperature Measurements. Experimental Techniques 45 (2021) 627-643.

DOI: 10.1007/s40799-020-00436-y

Google Scholar