Journal ArticleDOI
Numerical determination of the forming limit curves of anisotropic sheet metals using GTN damage model
TLDR
In this paper, the authors used the Gurson-Tvergaard-Needleman (GTN) damage model to determine the forming limit curve of anisotropic sheet metals.About:
This article is published in Journal of Materials Processing Technology.The article was published on 2015-02-01. It has received 100 citations till now. The article focuses on the topics: Formability & Sheet metal.read more
Citations
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Phenomenological uncoupled ductile fracture model considering different void deformation modes for sheet metal forming
TL;DR: In this article, a mathematical model of ductile fracture behavior is devised by considering fracture incipience as a void deformation limit phase, where void dilation and void elongation/rotation are carefully considered in the model.
Journal ArticleDOI
Modelling of ductile fracture in single point incremental forming using a modified GTN model
TL;DR: In this article, a modified Gurson-Tvergaard-Needleman (GTN) model was developed with the consideration of shear to predict ductile fracture in the single point incremental forming (SPIF) process due to void nucleation and coalescence with results compared with original GTN model in SPIF.
Journal ArticleDOI
Influence of the post-necking prediction of hardening law on the theoretical forming limit curve of aluminium sheets
TL;DR: In this article, the influence of the post-necking prediction of the hardening law on the theoretical forming limit curve (FLC) of aluminium sheets subjected to punch-stretching tests was clarified.
Journal ArticleDOI
Damage in metal forming
TL;DR: Physical mechanisms of ductile damage in metal forming, experimental characterization methods for damage, and models predicting the damage level in formed components are reviewed in this paper, where potential scientific and technological challenges are addressed to realize damage-controlled metal forming processes.
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Crystal plasticity extended models based on thermal mechanism and damage functions: Application to multiscale modeling of aluminum alloy tensile behavior
TL;DR: In this article, the authors studied the mechanical anisotropic properties of aluminum alloy using multi-level approaches for strain-rate and temperature-sensitive large plastic deformation of polycrystalline aggregates.
References
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Journal ArticleDOI
Continuum Theory of Ductile Rupture by Void Nucleation and Growth: Part I—Yield Criteria and Flow Rules for Porous Ductile Media
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A theory of the yielding and plastic flow of anisotropic metals
TL;DR: In this article, a theory is suggested which describes the yielding and plastic flow of an anisotropic metal on a macroscopic scale and associated relations are then found between the stress and strain-increment tensors.
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Analysis of the cup-cone fracture in a round tensile bar
Viggo Tvergaard,Alan Needleman +1 more
TL;DR: In this article, a set of elastic-plastic constitutive relations that account for the nucleation and growth of micro-voids is used to model the failure of a round tensile test specimen.
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Influence of voids on shear band instabilities under plane strain conditions
TL;DR: In this paper, the effect of microscopic voids on the failure mechanism of a ductile material is investigated by considering an elastic-plastic medium containing a boubly periodic array of circular cylindrical voids.
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Limit strains in the processes of stretch-forming sheet metal
TL;DR: In this paper, a theoretical analysis of the process of the generation of the groove based on anisotropic plasticity theory is presented, and the system of equations derived was solved numerically with the aid of a computer, which enabled the limiting strain of the sheet metal to be determined as a function of the material.