ANSYS - modeling
|Apr14-10, 03:58 AM||#1|
ANSYS - modeling
I would like to model in ansys a one-half of a ring with variable cross-section.
What is the easiest way to define variable cross-section for elements in ansys?
Do I have to define 5 (for example) different cross-section for each of 5 elements, if I create 5 beam element with different cross-sections and other section properties?
Can I import the table of cross-section and then somehow link it with the element type properties? Which element type can I link with the imported table?
I don't know with wich element types does function preprocesor-sections-beam-... work.
Thanks for your help!
|Apr14-10, 12:13 PM||#2|
Are the cross-sections step change? Either way, here's what you'll do
You now have the geometry. You'll next need to create your materials and cross sections. Here's where the step or linear change comes into play. If your cross sections are simply step changes, then simply define each cross section, for a total of 5 cross-sections. It will look something like this:
Now.....if your cross sections are not step changed, but if they are similar shape but taper themselves, then you can use TAPER beam sections. For a taper section, you define the starting cross-section and the ending cross-section, and then define an additional cross-section with a taper type. It will look something like this:
SECTYPE,10,name,BEAM,beam_type,refine_key SECDATA,CIRC,0.4,10,10,2 SECTYPE,11,name,BEAM,beam_type,refine_key SECDATA,CIRC,0.8,10,10,2 SECTYPE,1,name,TAPER SECDATA,10,11
Finally, simple mesh over the lines with the appropriate BEAM element type to generate the elements. IIRC, there is a BEAM183, so create your beam element type, and then you can just change your section in a DO loop or something, ala:
TYPE,1 REAL,1 MAT,1 *DO,i,1,5 SECN,i LMESH,i,i+1 *ENDDO
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