3-dimensional numerical modelling of rolling of superconducting AG/BSCCO tape

Numerical simulation of the deformation process during flat rolling of mult ifilament HTS tapes has been investigated using a commercial FEM program, E LFEN. The numerical models were built up in 2D and 3D using a Drucker-Prage r/Cap model for the powder. Three different roll diameters (circle divide 2 4 mm, circle divide 85 mm and circle divide 126 mm) have been investigated. It is found that it is possible to perform numerical simulation with 3D mod els of flat rolling of multifilament wire. Two 3D models have been used; 3D pressing with rolls and 3D rolling. 3D pressing with rolls have the advanc e that the simulation time is lower than in the 3D rolling. The 3D models h ave the advantage compared to 2D pressing that they can predict the 3 dimen sional flow in the flat rolling, which has been showed to be very imported for the super conduction properties.