- [Instructor] This video shows you
how to interrogate results
from an FE analysis when you're using truss elements.
It continues on from the previous video
which describes how to set up the truss model.
So we click Run The Study, and we see the results here.
There's two default results types,
Stress1, which has STRMAX,
which is the Upper Bound axial
and bending stresses combined,
and Displacement1, which has the results in Displacement.
Now neither of these are quite what we want.
Right mouse click on Stress1, Edit Definition,
change the Display to Axial stress,
make sure it's set on psi,
check the Pin icon so it can keep cycling through this.
Check Okay.
We see the axial stress is now plotted.
Check the Render beam profile, click Okay,
and now we see a representation of the cross section
of the truss.
Click off the deformed shape, check Okay,
and we can uncheck the Pin and check Okay.
So under Plot Tools, check Probe, and pick the two trusses
in turn.
Can switch off the X,Y,Z Location.
Now we can confirm the first truss on the left here
has 2.788 psi,
and the second truss has 3.66 psi.
This agrees with the benchmark, so check Okay.
Right mouse click on Results
and say List Beam Forces.
Check Okay.
Again, the axial forces match the benchmark
of 1831 and 13942.
Notice we can also save this off if we wanted to
as a CSV file.
Close this table down, right mouse click on Results,
and choose List Result Force.
This means list the reactions.
So we're gonna pick the two grounded joints,
this one and this one, and then we click Update.
The reaction forces balance the applied forces
of 10,000 in x and y.
Check Okay.
Right mouse click on Results
and select Define Beam Diagrams.
Choose the Axial Force,
and all beams are selected by default.
Make sure that the units are set to lbf.
Check Okay.
We can see a constant plot of axial force,
left hand and the right hand member,
and again they check the benchmark values.
We can also see a new result has spawned,
Plot1 Axial Force.
Finally, we want to check the component deflections.
So right mouse click on Displacement1, Edit Definition,
change this to Ux, check Okay.
Double click on the displacement part,
and the x deflection checks with the benchmark.
Right mouse click on Displacement1,
edit the definition, change this to Uy,
check Okay, and again, the deflection here,
2.98, agrees with the benchmark.
We can easily flip between these two plots
by right mouse click, say Edit Definition,
hold down the Pin, then this is Uy,
you can change that to Ux,
check, I can change back to Uy, check,
so I can easily flip between Ux and Uy in that way.
So Cancel out,
and now let's save the file.
We're going to save it as simple_truss_3D geometry_end,
and we do want to copy the results files.
So in this video, we've seen how to check results
from an FE analysis of a truss-based element model,
and we created the model
using 3D Geometry as a starting point.