Determination of anisotropy and material hardening for aluminum sheet metal

Tardif, Nicolas; Kyriakides, Stelios

doi:10.1016/j.ijsolstr.2012.01.011

Cited by 145 publications

(44 citation statements)

References 27 publications

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“…Please recall that specific hydraulic clamping bushes guarantee a very small misalignment as demonstrated in [25] with the very reproducible measurements performed during the tension-torsion test.…”

Section: Femu Algorithm 241 Test Modelingmentioning

confidence: 85%

Identification of the steady-state creep behavior of Zircaloy-4 claddings under simulated Loss-Of-Coolant Accident conditions based on a coupled experimental/numerical approach

Campello

Tardif

Moula

et al. 2017

International Journal of Solids and Structures

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Section: Femu Algorithm 241 Test Modelingmentioning

confidence: 85%

Identification of the steady-state creep behavior of Zircaloy-4 claddings under simulated Loss-Of-Coolant Accident conditions based on a coupled experimental/numerical approach

Campello

Tardif

Moula

et al. 2017

International Journal of Solids and Structures

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“…Another important question, which should be investigated in the future, is if the parameters identified with the Yld2000-2D 2.00 1.63 2.07 153 notched specimens are able to predict the plastic behaviour in the biaxial condition. This can be done using a bulge test or a disc compression test, as showed for instance by Tardif and Kyriakides (2012) for the Yld2004-3D model.…”

Section: Application Of the Yld2000-2d Criterionmentioning

confidence: 99%

Application of the virtual fields method to large strain anisotropic plasticity

Rossi

Pierron

Štamborská

2016

International Journal of Solids and Structures

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The identification of the plastic behaviour of sheet metals at severe deformation is extremely important for many industrial application such as metal forming, crashworthiness, automotive, aerospace, piping, etc. In this paper, the virtual fields method (VFM) was employed to identify the constitutive parameters of anisotropic plasticity models. The method was applied using the finite deformation theory in order to account for large strains. First the theoretical principles to implement the method are described in details, especially how to derive the stress field from the strain field. Afterwards a numerical validation was performed using the Hill48 model. Several aspects were studied with the numerical model: the effect of the used virtual fields, the minimum number of specimens required to identify the parameters, the stress distribution obtained from the specimen and its influence in the identification performance. A brief analysis on the influence of noise is also conducted. Finally a series of experiments was conducted on notched specimens of stainless steel, cut along different anisotropic directions. The displacement and strain fields were obtained by digital image correlation. Afterwards, the VFM was used to identify the parameters of the Hill48 model and the Yld2000-2D model. In this case, the Hill48 model was not able to correctly describe the material behaviour, while a rather good agreement was found with the Yld2000-2D model. The potential and the limitation of the proposed method are finally discussed.

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“…The decrease in the force level that is observed in the postnecking range can usually be described without introducing damage into the material model. However, as shown by Dunand and Mohr (2010), Sung et al (2010), Tardif and Kyriakides (2012) and Mohr and Marcadet (2015), a careful identification of the large strain hardening response of non-porous models through inverse procedures is required. Despite the physically sound formulation of Gurson models, it is very difficult to find experimental evidence that justifies their application to sheet metal as far as the description of the elasto-plastic material response is concerned.…”

Section: Introductionmentioning

confidence: 99%

Critical hardening rate model for predicting path-dependent ductile fracture

Marcadet

Mohr

2016

Int J Fract

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A new phenomenological framework for predicting ductile fracture after non-proportional loading paths is proposed, implemented into FE software and validated experimentally for a limited set of monotonic and reverse loading conditions. Assuming that ductile fracture initiation is imminent with the formation of a shear band, a shear localization criterion in terms of the elastoplastic tangent matrix is sufficient from a theoretical point of view to predict ductile fracture after proportional and non-proportional loading. As a computationally efficient alternative to analyzing the acoustic tensor, a phenomenological criterion is proposed which expresses the equivalent hardening rate at the onset of fracture as a function of the stress triaxiality and the Lode angle parameter. The mathematical form of the criterion is chosen such that it reduces to the Hosford-Coulomb criterion for proportional loading. The proposed framework implies that the plasticity model is responsible for the effect of loading history on ductile fracture. Important non-isotropic hardening features such as the Bauschinger effect, transient softening and hardening stagnation must be taken into account by the plasticity model formulation to obtain reasonable fracture predictions after nonproportional loading histories. A new comprehensive plasticity model taking the above effects into account is thus an important byproduct of this work. In addition, compression-tension and reverse-shear experiments are performed on specimens extracted from dualphase steel sheets to validate the proposed plasticity and fracture model.

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Determination of anisotropy and material hardening for aluminum sheet metal

Cited by 145 publications

References 27 publications

Identification of the steady-state creep behavior of Zircaloy-4 claddings under simulated Loss-Of-Coolant Accident conditions based on a coupled experimental/numerical approach

Identification of the steady-state creep behavior of Zircaloy-4 claddings under simulated Loss-Of-Coolant Accident conditions based on a coupled experimental/numerical approach

Application of the virtual fields method to large strain anisotropic plasticity

Critical hardening rate model for predicting path-dependent ductile fracture

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