Abstract :
strain space description of an elastic isotropic, plastic orthotropic constitutive model
is presented, which introduces the plastic orthotropy into the classical .&theory by a transformation
of the elastic strain deviator. The constitutive model is physically similar to Hill’s model, to which
it is compared analytically. It is implemented in a sheet metal forming finite element program, of
which simulation results on earing etfects are shown. The orthotropic plasticity algorithm resulting
from the deviator transformation is an explicit constitutive algorithm and, therefore, numerically
efficient. 0 1997 Elsevier Science Ltd
