Learning Forum

[Monish Yadav Pabbala]

Hello,

I'm trying a analyse a 3D Beam subjected to a non-linear body force in x & y. I have analytical expressions for the non-linear body force in x and y direction with x and y positions as the variables. I'm looping over each element in the domain and was using BFE,ele,FORC,1,(Body force X),(Body force Y),, command to enforce the body force with x and y from the element's centroid location to evaluate (Body force X and Body force Y), this is wrong since body force needs to be integrated all over the element.

From the MAPDL documentation I read that we can specify the body force at 8 corner nodes of the brick element to enforce the body force correctly, but I don't know how to do this. I tried inputting as a table for both Body force X and Body force Y with the expressions evaluted at the corner nodes, but when in the loop the table doesn't get updated when when I use Del or Set command.

I also tried using the function toolbox in Mechanical APDL, but it doesn't seem to work.

Any help regarding this highly appreciated, I've hit the road block and doesn't seem to be moving forward at all.

Thank you in Advance.

I can provide you with more information if needed.

[Ashish Khemka]

Hello,

Please refer to the following links which might help:

BFE (ansys.com)

3.5. Applying Loads (ansys.com)

Regards,

Ashish Khemka

[Monish Yadav Pabbala]

Hello Ashish,

Thanks for the link, but I already reffered to all the documentation, in the documentation it is mentioned that values at all the corner nodes of the brick element can be specified, I wanted to know if it's possible, and if yes then how to input the eight values at eight nodes based on their position in the cartesian coordinate system.
As of now, I loop over each element in the domain and while looping I specify the centroid's x,y and z in the analytical field equation for body force through the BFE,FORC, command, I wanted to know if I can do the same but instead of using the centroid's x,y and z in the equation using the 8 corner nodes' x,y and z using a table. If that's not possibl then I will continue using the centroid's location.

Thanks for your assist!

Regards,

Monish.