Researching Square Tube Cutout Stress Analysis 1

[Carl321654]

Hi,

I'm working on a design project to reduce the weight of a suspension. I'm trying to do research on the optimum cut out shapes/sizes on square tubes. I haven't been able to find anything useful and I'm guessing it might be because i'm not using the right terminology.

I have a square tube like this:

http://www.discountsteel.com/files/Image/oms_product/medium/STAINLESS_TUBE_SQUARE_127_3000.jpg

And I want to see stress analysis results of making cut outs using simple shapes (circle, triangle, etc) like these:

https://i.ytimg.com/vi/C9CTMGtyfDc/maxresdefault.jpg

Any help in terms of what to search for would be appreciated.

I'm in the process of modelling this on solid works but I'm having issues with that so I thought I'd do some research in the mean time. (

https://s31.postimg.org/cpk40ispn/Capture.jpg)

Thanks!

 

[SwinnyGG]

If you want to see stress analysis results for your application... you're going to have to do stress analysis calculations for your application. It sounds to me like you're looking for a shortcut, and you're not finding one because it doesn't exist.

 

[Carl321654]

Hi jgKRI,

Thanks for your reply. I'm looking to see if any research has already been done regarding cut outs on square beams. For example, I found one on cut outs of composite plates (

http://www.escm.eu.org/docs/eccm13/posters/2114.pdf).

I will do stress analysis calculations for my application but for the sake of time if I could find out what types of shapes are ideal in regards to stress concentration then that would help guide the design.

Carl

 

[SwinnyGG]

It appears to me that you're overthinking the problem.

If your goal is to avoid concentrated stresses, you need the largest possible corner radii. That means round holes. If your goal is maximum mass removal, you need square or triangular cutouts, with the choice between the two dependent on the loading.

 

[BUGGAR]

I'm doing something like this in Risa. I'm exploring a 10" x 10" x 8' long square tube made of 1/8" 6061 T6 plate. Its for a vehicle chassis part and I need to see how different size hand access holes affect the torsional rigidity. I have it meshed and submeshed (Thank you, Risa) and now I'm turning various submeshed plates on or off to see the results. I'm interested in torsional rigidity, not stress, but its all there in the program.

I can send the file. I believe Risa is also compatable with Staad.