Learning Forum

[rhylane.civil]

Hello everyone, I'm using the ANSYS Workbench and i need to model a beam with negligible warping resistance. Could you please kindly guide me on what sort of action should I take to do this?

[peteroznewman]

Perhaps you could describe the design requirements more fully.
Please define what you mean by warping.
Why do you want negligible resistance to warping?

[rhylane.civil]

Yes sure sir. I'm trying to study the response of a curved beam which is subjected to the vertical and lateral moving loads. I have analytical solution based on the assumption of that the warping resistance of the beam is neglected (Iw=0) and I would like to compare it with my result from Ansys workbench. I mean by warping, a torsional response of the beam.

[Erik Kostson]

Hi

As it says in the hep manual for beam188 (our beam element used in WorkBench Mechanical).
"By default,BEAM188elements assume that the warping of a cross-section is small enough that it can be ignored (KEYOPT(1) = 0)."
BEAM188 (ansys.com)
All the best

Erik

[rhylane.civil]

yes sir,you are right thank you so much for this information. So by default, the effect of warping resistance is assumed to be negligible for beam 188.
I've found also that i can include the effect of warping (KEYOPT(1)=1), but i don't know how i can do this.

[Erik Kostson]

Yes we can do that via a command snippet under the line body (beam) as shown below :
keyopt,typeids(1),1,1
The above sets (KEYOPT(1)=1), see keyopt command in the command reference of the apdl help manual for more info.
Thank you

Erik

[rhylane.civil]

really thank you so much sir for your help.

[Erik Kostson]

all the best.

Erik