real costant o sections?

[enrico1979]

Bye, guys.

Are you okay? ?
I am learning the classic of ansys and I am using the version of the v12 simply because I have available many tutorials related to it (which provide elements such as the beam3 that the version available in the v14 does not preview, for reasons that I will be able to understand once acquired a minimum of dexterity with the software).
Now I want to study a shelf beam and the tut recommends me a beam3c.
Let us hypothesize that it is lazy and that I do not want to calculate the inertia mom that is required in real costant. from the guides I read as inserting the section the software automatically calculates such moments of inertia and then I thought to insert sections>beam>common sections and give the geometric characteristics of the section (the part relative to the offset allows me to define the position of the origin of the reference system, right?????????????????????????????????????????????????????????????????
I am mistaken and the warning speaks of a lack of real costs.

What's wrong? ?
Is it not possible to replace the insertion of real costants with the sections (which seems to me to be something far more reasonable)?

thank you in advance and apologize if I answer questions, but I just want to learn my job well.

 

[stefano.garbin]

that provide elements such as beam3 that the version available in v14 does not provide, for reasons that I will be able to understand once acquired a minimum of dexterity with software

It happens that certain elements, while always present in the ansys solutor, are hidden both in the graphical interface and in the help.
these are called "legacy" and this happens because new elements with more advanced features are found.
for example the case of beam3 (trave 2d) and beam4 (trave 3d) which are replaced by beam188.
one of the advantages of beam188 (more extensively than the "current technology elements" 18x and 28x) is to be able to use the so-called sections.
then with

sections>beam>common sections

create your section (characterized by a unique id) and then the lines you will go to meshare as beam, as attributes you put on the sections id you previously defined.
I hope I've been exhaustive enough, good study!

 

[enrico1979]

thank you stefano

I don't want to take advantage of it and so I would understand if you don't answer me but I spent the last 2 hours at work trying to figure out how to meshare the line as beam and then assign it the previously defined id attribute. ? ?

thank you so much and good day.

bye

 

[stefano.garbin]

very quickly:
-design your lines
-iser element type beam188
- insert material characteristics
- go to sections->beam->common sections
- look at the image I attached

as you see right I'm working on the section with id=1, I called it "section", I selected as common section a full circular section, with radius of 1. if you click on "meshview" you understand the meaning of the other two parameters, n and n is the number of circumferential divisions, t those radial.

- assigns fli attributes to the lines as from attached image
- generates mesh
-type the following:

/eshape,1
eplot

 

[enrico1979]

Thank you very much

I owe you at least one dinner.

bye a good weekend