Modélisation numérique du flambage des plaques minces et applications au laminage

Abdelkhalek, Sami; Zahrouni, Hamid; Potier‐Ferry, Michel; Montmitonnet, Pierre; Legrand, Nicolas; Buessler, Pascal

doi:10.1051/meca/2009064

Cited by 3 publications

(3 citation statements)

References 11 publications

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“…Abdelkhalek et al [6] also proposed a decoupled approach, importing a FEM-computed stress field in a shell FEM for more generality. In the bifurcation detection stage, they maximized the load step and decreased the computational burden by managing the loading steps by the Asymptotic Numerical Method (ANM) developed initially by Zahrouni et al…”

Section: Brief Literature Surveymentioning

confidence: 99%

Manifested flatness defect prediction in cold rolling of thin strips

2014

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International audienceFlatness defects in thin strip cold rolling are a consequence of roll thermo-elastic deformation, from which heterogeneous strip plastic deformation results. When flatness defects manifest on line, buckling reorganizes the stress field in the pre- and post-bite areas. Comparison with flatness roll measurement requires this effect to be taken into account. A coupled Finite Element Method (FEM) approach is used here to compute stresses and strains in-bite as well as out-of-bite. The detection of buckled (non-flat) areas is demonstrated for a very thin strip cold rolling case. The model is then applied here to two questions, namely the impact on flatness of the heterogeneous temperature field and the effect of friction on optimal setting of a flatness actuator, Work Roll Bending

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Section: Brief Literature Surveymentioning

confidence: 99%

Manifested flatness defect prediction in cold rolling of thin strips

2014

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“…Another class of application is the buckling of metal sheets under the influence of residual stress (Fischer et al, 2000), which is of interest in the modelisation of industrial processes as web handling or rolling (Jacques et al, 2007;Abdelkhalek et al, 2009). In the case of rolling, a modified membrane model has been proposed by Counhaye (2000), that is more or less similar to the membrane wrinkling models of Roddeman et al (1987a) and Tabarrok and Qin (1992).…”

Section: Introductionmentioning

confidence: 99%

“…In the case of rolling, a modified membrane model has been proposed by Counhaye (2000), that is more or less similar to the membrane wrinkling models of Roddeman et al (1987a) and Tabarrok and Qin (1992). This approach has been proved to be useful to predict flatness defects (Abdelkhalek et al, 2008(Abdelkhalek et al, , 2009. Last, let us mention fibre microbuckling in long fibre composites materials (Kyriakides et al, 1995;Waas and Schultheisz, 1996;Drapier et al, 2001) that is a plastic instability that permits to explain compressive failure of these materials.…”

Section: Introductionmentioning

confidence: 99%

Influence of local wrinkling on membrane behaviour: A new approach by the technique of slowly variable Fourier coefficients

Damil

Potier‐Ferry²

2010

Journal of the Mechanics and Physics of Solids

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Multi-scale method for modeling thin sheet buckling under residual stresses in the context of strip rolling

Nakhoul

Montmitonnet

Potier‐Ferry

2015

International Journal of Solids and Structures

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International audienceIn cold strip rolling, the transverse gradient of thickness strain results in heterogeneous longitudinal stress σxxσxx. Whenever the latter is compressive in spite of strip tensions, an on-line manifested flatness defect may occur. It is of interest to determine the occurrence and geometric characteristics of such defects. To do this, a two-scale model based on the generalized continuum approach of Damil and Potier-Ferry (2006, 2008) is applied to this problem. It consists in developing the unknowns (in plane stress components and out-of-plane displacement) in Fourier series and solving von Karman equations of thin strip buckling, in an energetic formulation. For application to cold rolling, certain simplifications are made and commented. The potential of this method is analyzed using simple assumed stress fields via (i) parametric studies and (ii) comparison with other available studies: a semi-analytical solution and a more general FEM solution of sheet buckling by the Asymptotic-Numerical Method (ANM)

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Modélisation numérique du flambage des plaques minces et applications au laminage

Cited by 3 publications

References 11 publications

Manifested flatness defect prediction in cold rolling of thin strips

Manifested flatness defect prediction in cold rolling of thin strips

Influence of local wrinkling on membrane behaviour: A new approach by the technique of slowly variable Fourier coefficients

Multi-scale method for modeling thin sheet buckling under residual stresses in the context of strip rolling

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