The model is a simple notched tensile specimen. By using the symmetry I have modeled only 1/8 and given the symmetry surfaces with corresponding boundary conditions (x=0, y=0, z=0). At the upper surface I give up a displacement (y=10)

Here is my input file:

```
*INCLUDE, INPUT=all.msh
*INCLUDE, INPUT=sym_x.nam
*INCLUDE, INPUT=sym_y.nam
*INCLUDE, INPUT=sym_z.nam
*INCLUDE, INPUT=force.nam
*MATERIAL, Name=steel
*ELASTIC
200e3, .3
*PLASTIC, HARDENING=ISOTROPIC
400.000000, 0.000000
500.000000, 0.042179
600.000000, 0.170387
700.000000, 0.496688
800.000000, 1.225562
900.000000, 2.700146
1000.000000, 5.460853
*SOLID SECTION, Elset=Eall, Material=steel
*STEP, NLGEOM
*STATIC
.001, 1
*BOUNDARY
Nsym_x, 1, 1, .0
Nsym_y, 2, 2, .0
Nsym_z, 3, 3, .0
Nforce, 2, 2, 10.0
*NODE FILE
U
*EL FILE
S, E, PEEQ
*NODE PRINT, NSET=Nsym_y
RF
*END STEP
```

Here is a picture of the whole model. Nsym_y is â€śunderâ€ť the model, and Nsym_z is â€śbehindâ€ť the model.