shell and linear variation of thickness

[Dmaz]

Hi, everyone is probably a stupid question, but I miss it. .
I have to create shell91 square elements with variable thickness, for example from 1mm to 2mm.
I can specify the thickness of each node tk(i), tk(j), tk(k), tk(l). my doubt is: what is the knot i, the knot j etc? or how do you order ansys knots? growing? If an element is formed by the knots 12 14 25 27 will be i=12, j=14, k=25, l=27?
other question.. If I have a plate formed by six shell square elements as in the image and would like to linearly change the thickness in the direction of the arrow I must create 6 sets of real costant going to specify from time to time the thickness of each node by calculating by hand the increment?
Thank you.
dmaz

 

[stefano.garbin]

you better manage shells with "sections" and not with real constants.
try to take a look at the online guide, chapter 16.2
the commands you should use are:
♪
secreted
secfunction
Unfortunately there are no variable thick shell examples in the guide (at least I did not find it)

ps: see using shell181 that shell91 is no longer supported and documented.

 

[Dare1989]

Hi, dmaz.

Did you finally find out how to do it? because I have a shell structure to do, but they told me that to model a thickness change is better to define areas and then give these areas a different thickness to simulate this variation. then if you have to pass from 30 cm to 15 cm to create more areas and give for example a decreasing thickness up to 15 cm