Why is the bottom of a soda can concave?

Question

in correlation to pressure

Answer 1

Why do aluminum beverage cans have concave bottoms?

NOT its intended use: Jeff Snodgrass employs suction created by concave can bottoms to audition for The Late Show's 'Stupid Human Tricks.'
By Paul Hellstern, The Oklahoman via AP

No, it's not a trick to make you think you're getting more than you are. The aluminum walls of a carbonated beverage can are only .005 in. thick — about as thick as a magazine cover.

The walls can be so thin because the pressure of the carbon-dioxide gas stiffens the walls the same way a flabby balloon is stiffened when it's filled with air. That's also why the can bottom can't be flat: The pressure would push it out, and the can would rock on its bottom.

The concave bottom acts like an arch dam to resist the pressure. The top can't be dished, though, so it has to be thicker — which is why the cans have a "stepped neck": a smaller-diameter top uses less metal.

Answer 2

easily a sticking out round structure is extra efficient to resist the interior rigidity, yet yet another layout requirement is that the can no longer fall over even as set on this is bottom part. Ergo, the conCAVE bottom which produces a round tangent line to any flat floor. To all of us who thinks that is a neccessity to resist the rigidity: What about the accurate of the can! no man or woman even reported that! the answer to this finished ? is that the can structure is pushed via organic economics. the most inexpensive thanks to make that is via a procedure observed as result extrusion, the position a touch pellet of aluminum is dropped into the bottom of a really solid and stiff hollow area merely the fashion of the ouside of the can. Then a punch with a similar (exterior) structure is slammed into the hollow area. The aluminum is squeezed like toothpaste into the shape we are all conscious of. After filling, the accurate is placed on via a rolling procedure. this is made flat because the technique is too intense priced with the different structure, and to advance stackability for shipping. The flat accurate is solid adequate (regardless of the rankings in it to rip an starting) to resist any rigidity from the carbon dioxide interior.

Answer 3

It is the way they are made to give the can a more rigid structure without having to put two ends on it. This way they can stamp out one can and just put a top on it without sending it through another machine and being more costly. It also serves as a pressure point for the carbonated beverage to expand when the co2 is released without blowing up the can.

Answer 4

becouse if it was flat,carbonated pressure will cause the bottom to protrude outwards making the can unstable on a flat surface.being concave instead of flat or convex,make it possible to stand steady on it's base./\?

Answer 5

It's called a pressure dome, and it keeps the can from deforming due to the pressure of the carbonated liquid inside.

Answer 6

So when soda freezes it can push the bottom out, rather than the can cracking open.

Answer 7

Because it would have to be a 1/4 inch thick to stay flat and it wouldn't stack if it was convex.

Answer 8

because thats how the person who invented the soda can wished it to stay in his will...hahahahah i dont know

Answer 9

because if they were convex, the can wouldnt be able to stand up without falling over.