My brain isn’t smart enough to comprehend all that math haha. How could a chromoly hollow axle be stronger than one that is solid? It doesn’t make sense unless the hollow one was made of a stronger material.
I believe that hollow axles are better than solid ones when it comes to torsional loads. But what is for sure true is that they have a better strength to weight ratio than solid axles, as most of the structural integrity of cylinders is from the outer parts(refer to the equation in the stackexchange link). This doesn't mean that hollow axles are stronger than solid ones, but per gram, they are(sorry if this wasn't clear in my last reply).
Consider the examples in here here:
https://www.mtbiker.sk/forum/resources/file/207637"area moment of inertia is a property of a cross section that can be used to predict the resistance of beams to bending"
They then provide an example of a hollow and solid shaft of the same diameter.
"in this case, the hollow tube area moment of inertia is approximately 85% the solid rod of the same diameter but the cross sectional area (weight) of the hollow tube is only 62% of the solid rod."
Obviously these numbers vary given the dimensions of the axle but I think you get my point.
I don't have a physics degree so take what I say with a grain of salt. I'd say you are tempted to get hollows, don't let fears of bending stop you, I'm 190ibs, break a lot of shit, and have never had issues with hollow axles when I had them (but have had bad experiences with solid thunder 149 axles bending a lot). If anything its those pesky ace axles that never fail to bend.