Deflection of a tube beam where hollow is off-center

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SUMMARY

The discussion focuses on calculating the deflection and ultimate bending moment capacity of a hollow tube beam with an off-center hollow portion. It is established that the asymmetry of the hollow section complicates the analysis, as the bending moment axis may not align with the cylindrical axes. The participants suggest that this misalignment affects both the deflection direction and the load distribution, indicating a need for advanced analytical methods to address these complexities.

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  • Knowledge of bending moment and deflection calculations
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rkmore
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So I am trying to figure out how I can calculate the deflection and ultimate bending moment capacity of a hollow tube beam when the hollow portion is not concentric. A regular concentric tube is easy enough but this has me out of my depth.

I assume that it will no longer be symetric in its reaction and capacity but I am not really sure.

Any tips, links, or general thoughts to get me started in the right direction would be greatly appreciated.

Thanks...

RKM
 
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Is the axis of the bending moment in the same plane as the the two cylindrical axes?
 
Hmmm.. I want to say "no" but I can also see that complicates the problem considerably, the axis of deflection is (I think) no longer in the direction of the load :-(

Let's say "yes" for now and then if my brain doesn't explode trying to wrap itself around that problem I will try to tack the more complex case later.

RKM
 

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