FE CALCULATIONS OF COPPER BICRYSTAL SPECIMENS SUBMITTED TO TENSION COMPRESSION TESTS

Tension-compression tests are performed on copper bicrystalline specim ens, with a grain boundary parallel to the tension axis. The character isation of the slip system is made from microscopical observations at the surface of the specimens. A crystalline viscoplasticity model is i dentified on the single crystal tests. The model is then used in a Fin ite Element code to predict the behaviour of the bicrystals. The numer ical simulation is in good agreement with the experimental global forc e-displacement curve, and provides also a good description of the loca l slip activity.