Interaction between anisotropic plastic deformation and damage evolution in Al 2198 sheet metal

Steglich, D.; Wafai, Husam; Besson, Jacques

doi:10.1016/j.engfracmech.2010.08.021

Cited by 61 publications

(31 citation statements)

References 51 publications

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“…However, the crack remains flat. Even for materials with stronger texture the crack remains flat when using a macroscopic plastic anisotropy model that accounts for the stronger plastic anisotropy in a GTN framework [42]. In Ref.…”

Section: Damage Modelmentioning

confidence: 99%

In situ laminography study of three-dimensional individual void shape evolution at crack initiation and comparison with Gurson–Tvergaard–Needleman-type simulations

2014

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Section: Damage Modelmentioning

confidence: 99%

In situ laminography study of three-dimensional individual void shape evolution at crack initiation and comparison with Gurson–Tvergaard–Needleman-type simulations

2014

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“…Therefore, engineering applications have significant interest in aluminium alloys with lithium content because of its great potential to simultaneously provide increased damage tolerance coupled with reduction of density . The addition of Li to Al offers the possibility to reduce substantially the weight of aeronautical alloys, once every 1%wt added to Al reduces density by 3% and increases elastic modulus by nearly 6%, in addition to enabling the formation of powerful hardeners precipitates …”

Section: Introductionmentioning

confidence: 99%

An investigation on friction spot welding of AA2198‐T8 thin sheets

Barros

Campanelli

Alcântara

et al. 2016

Fatigue Fract Eng Mat Struct

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The feasibility of joining 1.6‐mm‐thick sheets of AA2198‐T8 by the novel friction spot welding technology and the resulting microstructural features on the welds cross sections were assessed, with further evaluation of the process parameters on the weld performance. Besides the intrinsic discontinuity related to the interface between the sheets, the hook feature was found to be inherent to the welding process, and its morphology was determinant to the weld performance and fracture mode. A beneficial response on the shear strength was achieved with the minimization of the hook feature because of the absence of a potential site for crack nucleation, although the generation of other defects, depending on the combination of parameters, could erase this benefit. Through statistical analysis, the most influent parameters on the weld performance were plunge depth and welding time. In the present study, regardless of the weld discontinuities, the optimum shear strength revealed a satisfactory performance in mechanical terms for aerospace applications.

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“…The initial voids volume fraction has been determined from microstructural observations (Section 2.2) and methods recommended in the literature [27,[33][34][35]. In this work, the initial void volume fraction is estimated by the inclusions volume fraction, which corresponds to f 0 = 0.0015.…”

Section: The Initial Void Volume Fractionmentioning

confidence: 99%

Experimental characterization and numerical modeling of micromechanical damage under different stress states

et al. 2013

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. The use of HSLA steels for the manufacture of automotive components is interesting from an engineering point of view. This family of steels, while possessing high strength, also has good formability and can be used in forming manufacturing processes. In some forming processes such as blanking, shear strain localization occurs, which causes damage and results in the final fracture of the material. This paper presents an experimental study based on in situ tests to understand and identify the physical mechanisms of ductile damage under two stress states: tension and shear. Different macroscopic tests were performed to calibrate a damage model based on a micromechanical approach. This damage model is based on the Gurson-Tvergaard-Needleman theory and presents recent improvements proposed by Nahshon and Hutchinson and by Nielsen and Tvergaard so as to better predict fracture under a wide range of stress states, especially with low levels of stress triaxiality. These extensions have made the identification of the material parameter more complicated. In this work an identification strategy has been proposed using tests on specimens with different shapes. The identified parameter values are validated and the fracture model show good predictive capability over a wide stress state range.

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Interaction between anisotropic plastic deformation and damage evolution in Al 2198 sheet metal

Cited by 61 publications

References 51 publications

In situ laminography study of three-dimensional individual void shape evolution at crack initiation and comparison with Gurson–Tvergaard–Needleman-type simulations

In situ laminography study of three-dimensional individual void shape evolution at crack initiation and comparison with Gurson–Tvergaard–Needleman-type simulations

An investigation on friction spot welding of AA2198‐T8 thin sheets

Experimental characterization and numerical modeling of micromechanical damage under different stress states

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