Anisotropic material; Crystal plasticity; Finite elements; Swift effect; LIMARC
Abstract :
[en] FEM numerical simulations of the experimental free end torsion tests [Toth, L.S., Jonas, J.J.,
Daniel, D., Bailey, J.A., 1992. Texture development and length changes in copper bars subjected
to free end torsion. Textures Microstruct. 19, 245–262] of copper cylindrical bars were analysed in the present study. The self-made Finite Element (FE) code LAGAMINE was used to compute
numerical prediction of the Swift effect, i.e. the lengthening of the cylinder during the torsion.
The material behaviour was represented by an interpolation law [Habraken, A.M., Ducheˆne, L.,
2004. Anisotropic elasto-plastic finite element analysis using a stress–strain interpolation method
based on a polycrystalline model. Int. J. Plasticity 20 (8–9), 1525–1560] linked with a Taylor polycrystal plasticity model either based on a strain rate insensitive or a visco-plastic crystal plasticity model. The influence of texture evolution was analysed. A torsion dedicated remeshing technique was developed to allow very large strain simulations. Predicted axial lengthening and predicted textures were compared to experimental measurements. A good agreement was obtained for shear strain up to 2.0. The Swift effect related angular shift of the pole figure maxima from symmetrical orientations was reproduced correctly.
Disciplines :
Materials science & engineering
Author, co-author :
Duchene, Laurent ; Université de Liège - ULiège > Département Argenco : Secteur MS2F > Département Argenco : Secteur MS2F
El Houdaigui, Fouad
Habraken, Anne ; Université de Liège - ULiège > Département ArGEnCo > Département ArGEnCo
Language :
English
Title :
Length changes and texture prediction during free end torsion test of copper bars with FEM and remeshing techniques
Publication date :
2007
Journal title :
International Journal of Plasticity
ISSN :
0749-6419
Publisher :
Pergamon Press - An Imprint of Elsevier Science, Oxford, United Kingdom
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