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the concepts are related, though leverage is a 1:1 with diameter / length while bending stiffness is diameter cubed. Incidentally, the torsional stiffness is diameter to the 4th power which really translates to a big improvement as you step up even the 1/8”
a solid bar would be stiffer than a tube of same material and dimension. The reason the hollow bar you posted was stiffer was the increased diameter and probably better steel.
But it’s true that a hollow tube can be really close in stiffness to its solid bar companion; but it can’t be as stiff...
Kern, it’s simple as carpentry. A 2x12 joist is stiffer and stronger than 2) 2x6 next to each other despite the amount of wood being roughly the same.
The strength of the beam increases as cube of the height. So a joist that is 2x taller (such as a 2x12) would be 2x2x2 = 8 times stiffer than...
I text titty pix to my dad and brothers all the time. The trouble starts when I’m a little loaded and accidentally include my mom. On the text, you animals, not...