Thank you very much Roozbeh. I tried my first example of sheet pile wall.
Trying to model it, and looking at some examples in the forum, I was a little bit confused with the units.
For example in my example I use kN and m (declaring it as user-defined, so results are in the same units as data). Ι used a soil with bulk modulus 15000 kPa , Shear mod. 7500 kPa, cohesion 8 kPa and Mass Density 20 kN/m3, and a sheet pile with Area=0.006 m2 , Monent of Inertia=1.28e-4 m4 (per metre of length) and Elastic modulus 2.1e8 kN/m2. I have also applied a (huge) load pressure at the top 65 kN/m2.
In the results, shear force and bending moment are in kN and kN/m2, but the displacements look like being expressed in mm and not in m. (or else I have done something very wrong). Is this correct?
I also wanted to ask, if I use for example cm as units, the geometric dimensions of the model must be given in cm also, or they are always in m?
I'm continuing translating in Greek. I think I'll finish in about a week.