Crystal plasticity finite element modelling of surface roughness and texture of metals

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Conference Proceeding
Proceedings of the 10th International Conference on Technology of Plasticity, ICTP 2011, 2011, pp. 906 - 911
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A crystal plasticity finite element method (CPFEM) model was developed to analyse the surface roughness transfer and texture of metals during metal forming. In order to investigate the crystal slip mechanism and influence of different polycrystalline models (Taylor-type model and finite element polycrystalline model) on finite element modelling, the uniaxial compression of FCC pure aluminium was carried out in laboratory, and the Taylor-type and finite element polycrystalline models are separately employed in the finite element software ABAQUS to simulate the development of the deformation texture by rate dependent crystal constitutive equations during three different deformation modes (free compression, uniaxial planar compression and uniaxial tensile). The results obtained from the three different deformation modes show the same tendency that, with an increase of strain, the silk texture tends to be stronger and sharper. Both Taylor-type and finite element models can predict the tendency and silk texture. The simulation result is in good agreement with the experimental result in the surface asperity flattening process, and with an increase of reduction, the surface roughness tends to decrease significantly, lubrication can hinder the surface asperity flattening process effectively. © 2011 IBF (RWTH Aachen) & IUL (TU Dortmund).
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