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Necking

About: Necking is a research topic. Over the lifetime, 5280 publications have been published within this topic receiving 113945 citations.


Papers
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Journal ArticleDOI
TL;DR: In this article, the authors describe the characteristics of the strain field within and outside of a propagating Luders band and the properties of strain states associated with diffuse and localised necking.
Abstract: The aim of this paper is to show that recent advances made in the field of speckle image processing give valuable information useful in understanding and modelling of localisation phenomena. The potentialities of the proposed imaging method are illustrated by examples extracted from tensile tests performed on steel specimens. Having introduced the underlying motivations of this experimental work, this paper briefly focuses on the image processing technique and its reliability. Then, it describes the characteristics of the strain field within and outside of a propagating Luders band. The properties of strain states associated with diffuse and localised necking are also investigated. The catalyst role of possible geometrical defects is pointed out. Finally, a method is proposed to construct, despite localisation, a local stress–strain correspondence.

72 citations

Journal ArticleDOI
TL;DR: In this article, an extended Gurson-type constitutive model supplemented by micromechanics-based criteria for both void nucleation and void coalescence is assessed for the limit of very flat voids towards the finite element cell calculations.

72 citations

Journal ArticleDOI
TL;DR: In this paper, a eutectic Cu-Ag alloy was processed by high-pressure torsion up to 20 revolutions to reveal the microstructural evolution and mechanical properties.

72 citations

Journal ArticleDOI
TL;DR: In this paper, it was shown that the size and orientation of an imperfection is critical in determining whether or not localized necking is initiated along the imperfection, and the influence of strain hardening, strain rate hardening and plastic anisotropy on the occurrence of local necking of imperfect sheet is also examined.
Abstract: Localized necking in sheet metal has been examined for strain paths between uniaxial tension and plane strain (ie, the negative minor strain region of a forming limit diagram) The behavior of sheet with preexisting imperfections has been analyzed and is contrasted to that free of imperfections In particular, it is shown that the size and orientation of an imperfection is critical in determining whether or not localized necking is initiated along the imperfection The influence of strain hardening, strain rate hardening, and plastic anisotropy on localized necking of an imperfect sheet is also examined One of the most significant conclusions obtained from present analysis and from a reexamination of Hill’s theory is the prediction of a critical thickness strain criterion for the onset of localized necking at negative minor strains, regardless of whether or not an imperfection is present The critical thickness strain criterion is observed in Ti alloys, Al alloys, steels, and brass

72 citations

Journal ArticleDOI
TL;DR: In this article, the authors quantified the impact of the transformation of the metastable austenite phase embedded in a ferrite-bainite-martensite matrix on the work hardening of a high-strength industrial TRIP-assisted dual-phase steel.

71 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023174
2022351
2021241
2020249
2019213
2018238