🧵 Untitled Thread
Anonymous at Tue, 18 Jun 2024 14:34:56 UTC No. 16241058
I was doing some research on sword fullers (the channels on the surface of a blade) and I found some contraddictory claims that reducing cross section can increase rigidity and I came across a datasheet for 1060 steel which seems to imply something similar.
Is this an actual thing? How does an increase in section apparently cause a lowering of tensile stregth and yield strenght?
First two columns is the range of the cross section area
Anonymous at Tue, 18 Jun 2024 18:40:01 UTC No. 16241367
>>16241058
I'd imagine it's normalized for either weight or an entire sword profile. Obviously there's no magic meme shape that makes something stronger, if you take a given profile and then remove material it will be weaker than what it was. But if you normalize it for say weight then it can make sense where removing material from certain places makes it stronger in comparison to a different profile of equivalent weight. Or if it's normalized to the entire sword then reducing material in say the tip can make the sword more rigid due to it being lighter for instance.
Also you may just be reading it wrong. If the cross section varies so wildly then chances are those are different form factors or different types of swords not the same sword scaled up or down or shaven thinner. It's hard to say with just a graph without units or explanations
Anonymous at Wed, 19 Jun 2024 01:23:14 UTC No. 16241970
>>16241367
This guy's on the right track. Look up "second moment of area" or "area moment of inertia". For a given cross sectional area, putting the material farther away from the axis of bending makes an object stiffer. That's why I-beams used in construction are shaped the way they are.