Dear all I have a 3D model with
Dear all I have a 3D model with
(OP)
Dear all
I have a 3D model with CTETRA solid elements and I need to get the maximum force in the structure when running a static analysis.
The problem is when I request force (FORCE=ALL) I don't get any force output... why?
I have a 3D model with CTETRA solid elements and I need to get the maximum force in the structure when running a static analysis.
The problem is when I request force (FORCE=ALL) I don't get any force output... why?





RE: Dear all I have a 3D model with
I seldom work with solid (3d) elements but don't they usually give results as stresses, not forces?
Thomas
RE: Dear all I have a 3D model with
yes they give stress results, but what about the forces? if the stress result is available, there should be forces somehow...
RE: Dear all I have a 3D model with
What would the forces be based on?
For 3d you have force/area = stress.
Thomas
RE: Dear all I have a 3D model with
You can perhaps consider it this way. For 1d and 2d elements you have area or thickness as input. That means that the solver can multiply the stress to get either force or force/length. But for 3d elements there is no parameter to multibly the stress with for the solver.
I don't know exactly what you want bu freebodys may be an option depending on the postprocessor.
Thomas
RE: Dear all I have a 3D model with
I have a 3D model and I want to know the maximum force present, under certain load conditions
maybe solid elements are not the best to get the maximum force?
With shell elements for a plate for example, I can get the forces, but now I have a more complex geometry and not easy to model with shell elements
RE: Dear all I have a 3D model with
RE: Dear all I have a 3D model with
Or you can check freebody loads with GPFORCE = ALL as marulanda mentioned in this perfect mesh model. Again you would "exactly detect" where your biggest "force" in the model would be.
If you can't do sci-fi stuff due to CPU or budget constraints, second degree tet elements are mostly accurate enough for the peak stress checks as long as they are modeled as 2-3 or more layers of mesh along any thickness throughout the model. You could also try this instead.
Spaceship!!
Aerospace Engineer, M.Sc. / Aircraft Stress Engineer
RE: Dear all I have a 3D model with