how to increase axle strength
Building small cart to portage canoe(72 pounds). I'm 77 years old and no longer strong enough to put it on my shoulders. Would like to increase axle strength. Axle is 1/2"schedule 80 PVC pipe, not tubing, with 1/2" aluminum rod(41" long)inside. Clearance between inside of PVC and aluminum rod is ever so small. If I can find some kind of epoxy or glue that I can coat the aluminum rod with before sliding it into the PVC, will that substantially or even at all increase the strength of the axle.