Quote:
Originally Posted by notmattlythgoe
Would you mind pointing me to the data that backs this up?
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I was curious too, so I ran some simulation (using Inventor's FEA tools) and found that 8020 is in fact significantly weaker in torsion and slightly weaker in bending. I can't attach images to a CD-media, so I'll summarize the results:
For bending, I constrained both ends of a 1' beam and applied a load to the top face. For torsion, I constrained one end of the same beam and applied a torque to the other.
100lbf load on top face of section, ends constrained:
0.001536" max deflection 8020 (load split between two top flanges on either side of groove)
0.001614" max deflection 0.063"
0.001006" max deflection 0.125"
200 in-lbf torque at end of section, other end constrained:
0.1311" max deflection 8020
0.01055" max deflection 0.063"
0.006772" max deflection 0.125"
The weight of 8020 vs 0.125" 1x1 box is virtually the same, 0.063" would be roughly half.