Experimental and numerical studies on the warm deep drawing of an Al–Mg alloy

Laurent, Hervé; Coër, J.; Manach, Pierre‐Yves; Oliveira, M. C.; Menezes, L.F.

doi:10.1016/j.ijmecsci.2015.01.009

Cited by 84 publications

(56 citation statements)

References 26 publications

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“…location for Test-piece 1 and 2. However for Test-piece 3, the difference of the major strain between the numerical and experimental results may be attributed to the fact that a constant friction coefficient was used in the FE model, but the friction situation was changed in the experiment [3]. At t/tf=0.3, the punch starts to stretch the test-piece up from the center and cause little major strain in the center of the sample.…”

Section: Resultsmentioning

confidence: 99%

“…to that of rolling, for equibiaxial strain states, at a temperature of 250 ˚C and a forming speed of 20 mm/s, where t and t0 are the current and initial thickness. It is observed that the thickness variation of the specimen is not significantly dependent on direction [3].…”

Section: Experimental Programmementioning

confidence: 90%

“…The sheet was meshed using four-noded linear thin shell elements, with five elements through the thickness to ensure bending could be captured. Since the plastic anisotropy of AA5754 aluminium alloy is insignificant [3], isotropic material was used in this FE model. A quarter symmetry finite element model is shown in Figure 6.…”

Section: Development Of Finite Element Model For Formability Testmentioning

confidence: 99%

“…Using hot/warm forming methods, the formability of aluminium alloys can be improved. The ductility of these alloys increases with temperature, and generally is enhanced by low deformation speed [3]. However, it is a fact that the ductility of some aluminium alloys can be enhanced by raising deformation speed (AA6082 for example) [4].…”

Section: Introductionmentioning

confidence: 99%

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Application of a continuum damage mechanics (CDM)-based model for predicting formability of warm formed aluminium alloy

Bai

Mohamed

Shi

et al. 2016

Int J Adv Manuf Technol

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Predicting formability of sheet metal in warm forming condition is a challenge since warm forming is a thermo-mechanical process, and formability is varied with temperature and strain rate. Current standard forming limit curves (FLCs) which have been established for fixed values of temperatures and strain rates cannot be used directly to predict the formability of sheet metal in warm/hot forming processes. In this paper a series of experiment were carried out to establish FLCs for AA5754 at a temperature range of 200˚C -300˚C and a forming rate of 20mm/s -300mm/s using Argus system. Based on a set of continuum damage mechanics (CDM)-based theories, the constitutive model is implemented in Ls-Dyna user subroutine. FE result of strain distribution was compared with the experimental result from Argus system in terms of different strain paths. FE results have a good agreement with the experimental results, which indicates the FE model developed can be used to predict formability for warm forming process.

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Section: Resultsmentioning

confidence: 99%

Section: Experimental Programmementioning

confidence: 90%

Section: Development Of Finite Element Model For Formability Testmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Application of a continuum damage mechanics (CDM)-based model for predicting formability of warm formed aluminium alloy

Bai

Mohamed

Shi

et al. 2016

Int J Adv Manuf Technol

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“…Accordingly, in order to meet these requirements, new materials have been introduced in car body manufacturing, such as highstrength steels as well as aluminium alloys [2][3][4]. Nevertheless, these material are more prone to develop geometrical defects, namely springback [5]. Another important geometrical defect arising in sheet metal forming is the wrinkling behaviour, which results from the instability under compressive stresses [6].…”

Section: Introductionmentioning

confidence: 99%

Prediction of wrinkling and springback in sheet metal forming

et al. 2016

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Abstract. The finite element simulation is currently a powerful tool to optimize forming processes in order to produce defect-free products. Wrinkling and springback are main geometrical defects arising in sheet metal forming. Nevertheless, the prediction of such defects requires accurate numerical models. This study presents the experimental and numerical analysis of a rail with high tendency to develop both wrinkling (top surface of geometry) and springback (flange). The punch force evolution and the final geometry of the rail, evaluated in four different cross-sections, are the main variables analysed. Globally, the numerical results are in good agreement with the experimental measurements. However, the shape of the wrinkle is significantly influenced by the symmetry conditions considered in the model (1/4 of the blank). In fact, considering the full model of the blank, the numerical results are in better agreement with the experimental ones. On the other hand, the computational cost of the numerical simulation considering the full blank is approximately 12 times higher than using 1/4 of the blank.

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