---- Elastic-Plastic Torsion Problem -----
mx: 10     my: 10   

iter =   0, Function value -0.330579, Residual: 0.728961 
iter =   1, Function value -0.391219, Residual: 0.386209
iter =   2, Function value -0.416589, Residual: 0.23073 
iter =   3, Function value -0.424685, Residual: 0.104157 
iter =   4, Function value -0.426842, Residual: 0.0415948 
iter =   5, Function value -0.427407, Residual: 0.0274839 
iter =   6, Function value -0.427591, Residual: 0.0383585 
iter =   7, Function value -0.427692, Residual: 0.0216641 
iter =   8, Function value -0.427745, Residual: 0.00129497 
iter =   9, Function value -0.427745, Residual: 0.00107994 
iter =  10, Function value -0.427745, Residual: 0.000856314