Learning Forum

[MHND]

thanks for your help 
yes the large Deflection is On.

First: can I have the element coordinate system relative to the deformed position? Because In the Elemental Triads, you can have the element coordinate system relative to the start position and not the end position. 

Second: That is, forces and moments from the probe refer to nodal constraint reactions in the undeformed coordinate system in the global coordinate system, but the moment is the force integrated about the surface using the moment arm. 
moment_arm  = (x+ux, y+uy, z+uz) - (sx, sy, sz)
In this case what is the surface and moment arm when I have just point (constrained node)!? I am confused about the moment reaction they get from probe on vertex?