Control of Electrically Assisted Forming - Electrically Assisted Forming - page 162

Fig. 7.5 Constant force forming at varying set points (no force correction). Three different force
set points are achieved through modulation of electric current [ 1 ]
The conversion of the constant force results to stresses is presented in Fig. 7.6
where the true stress increases linearly as a result of the force maintaining a constant
value. This calculation was performed assuming uniform deformation as given by:
Fig. 7.6 Stress response for constant force forming. The estimated stress response for constant
force control for the three different cases is given [ 1 ]