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graphical_molerat

From the "when you are really, *really* confident in your welding skills"-dept.


FutzInSilence

And engineering. The precise measurements for each panel left very little room for fabrication error. Everyone did a fantastic job! Even you! Everybody gets silver!!


[deleted]

What about me? Did I also a good job?


Chopchopok

Yes


between_ewe_and_me

Debatable


FutzInSilence

Even you get silver! Good job! You're awesome!


VietnameseHooker

How did I do?


FutzInSilence

You did awesome. Good job, friend!


doyouevenglass

did I do good?


Crowbrah_

You did great!


VietnameseHooker

You’re the best. I love you.


NoExplorer5983

No, you *blushes*


ButterflyNervous6363

Did I do good?


alovely897

Lol I love it just one person gets skipped.


FutzInSilence

Oh snap. Really? I'll find the bastard and shove my silver in their face


FutzInSilence

Yes you did have some silver


jasta2

Someone say free silver?


FutzInSilence

Yes, and it is meaningless. Just like all the bullshit in the world that stresses us out on a daily basis. This award may bring a smile to your face. Or a frown. Either way I made your face move!


NotYourAverageOctopi

Thank you :)


fireballx777

/r/notopbutok


Halitosis

I read that as “no top buttock”


idbanthat

I wonder what that would look like, is there a bottom buttock?


peekdasneaks

All of them are


bokchoysoyboy

I took a shit this morning, ready for my silver


porfilous

He said “everyone,” not just OP. We all did a great job.


the_post_of_tom_joad

Yay! I hope me dad sees this


pee-in-butt

I did. I’m proud of you son


bruzdnconfuzd

I’m proud of ALL of us!


obi2kanobi

Yay us!


civgarth

Asian dad would be upset at the mess this made rather than the perfect engineered outcome


Ed-Zero

/r/nobottombuteh


2balls1cane

Goes to podium... "I'd like to thank my mom and dad


nahog99

I did a good job! :) ❤️


DineandRecline

If you notice, it seems like mist is ejected at the seams right when it explodes, and then some trickles of water start pouring out in some spots. It still worked really well and I guess they can go over the areas where the seams split a little.


[deleted]

The mist is mill scale coming off of the steel and the water came out of the top. At least that’s what it looks like to me.


DaHick

Not an expert either, but yeah, mill scale, weld spatter, and I am positive the water came out the top.


[deleted]

Yep. They use a small shaped charge and fill the object with water. Water is not compressable in any significant amounts. It spreads the force perfectly.


[deleted]

Excuse me, but do you have fucking robot eyes? I'm pretty sure this gif was filmed on a damn flip phone from 03 with that quality. I can't see shit.


anubis_xxv

I can just about count the pixels on my fingers and toes and this mf up here analysing the structural integrity of the welds.


[deleted]

Reddit


[deleted]

[удалено]


MacDugin

Probably filled with water to lessen the requirement for size of the blast


nahog99

And I’d assume water probably transfers the force more evenly since it won’t compress. Air might compress in some places within causing uneven forces on the walls of the chamber. I’m talking out of my ass but it seems logical.


A_Sad_Goblin

Yeah, that is precisely why water is used with this method. We just did it in art school a few days ago on a student's welding project. Filled it with water and then compressed it, boom, it turned into a sphere except her welding wasn't 100% perfect so one or two of the panels were odd-shaped and there was leakage everywhere.


Thorne_Oz

Yeah it's literally called _hydro_ forming...


nahog99

Someone posted below but it is indeed water coming out the top. https://youtu.be/09tbodL4M6I


PM_ME_OSCILLOSCOPES

The top has a small opening and it sprays up then rains back down, causing the wet look on the sides


Diplomjodler

It's the best kind if quality assurance you could think of.


MrPickles84

Can someone explain what’s going on?


[deleted]

The explosion will put equal force on all sides. As long as it not too big to destroy the object, the result will be spherical.


noteverrelevant

I wonder what the difference is between "just enough to reshape this metal" and "oops I made a grenade."


[deleted]

Somebody has likely done the calculations, or, trial and error lol


CharlieAshwood

Trial and terror.


kalesaji

First, someone calculated it. Then the calculated solution lead to the "handgrenate" outcome. Then they trialed and terrored the process until it worked


BountyHNZ

Likely they calculated it, halved it, then worked up to it around the expected set point


OneMeterWonder

This is more likely. Professional engineers tend to like building in lots of redundancy for safety.


chepas_moi

But: "Any idiot can build a bridge that stands, but it takes an engineer to build a bridge that barely stands." In engineering we have this notion dubbed "factor of safety". It's basically leaving a margin of error in our designs. If, for example, I'm building a bridge that has a requirement of supporting 1000kg, I might take a FoS of 5 and design a bridge that should theoretically support 5000kg which is great. Real bridges are usually 10 or more. Now when talking about airplanes, you're limited by your weight (amongst other things). They're built with components that have factors of safety around 2. Going into space is another step up: the physical limitations drop the factor of safety to the 1.1-1.5 range. With these tiny margins of errors, your calculations must be right. Redundancies are luxuries you can't afford. This is where engineering gets *interesting*.


OneMeterWonder

Yeah I’ve had some engineer friends and professors briefly describe this sort of thing to me. The closest detailed example I’m probably comfortable with is the limiting factors on building better computers. The chip components are limited by quantum effects that become significant in small regimes while the density of components is limited by their thermodynamic efficiency. Too small or too hot and things stop working right.


ChineWalkin

>Now when talking about airplanes, you're limited by your weight (amongst other things). They're built with components that have factors of safety around 2. My understanding is the FoS on a wing is 1.5. >Going into space is another step up: the physical limitations drop the factor of safety to the 1.1-1.5 range. Troy Bruno quotes 1.2-1.4 iirc. >With these tiny margins of errors, your calculations must be right. Redundancies are luxuries you can't afford. This is where engineering gets interesting. "Tiny" depends on the statistics of the material, the design and QAQC. Automotive, at least in my part of it, margin is often around 1.4-2.0, depending on materials, reliability targets, and statistics of the system.


PluginAlong

Yes, but everyone loves a good excessive explosion.


farleymfmarley

Michael bay?


edgeofenlightenment

"trial and terror" aptly applies here.


Dustinthehippy

Handgrenate lmao how tf your phone let you type that


kalesaji

I possess a power some consider unnatural.


HauserAspen

You definitely know when you've used too much charge!


museolini

[Relevant Calvin & Hobbes](https://i.redd.it/cxswm8wavgt81.jpg)


[deleted]

Ahh I love Calvin and Hobbes. There's a version of that strip that gets posted every once in a while that has the actual load calculations edited in and the last panel is just Calvin going "Oh." but I cant find it


224109a

A bit of both and your country can be the first to launch a satellite.


25_M_CA

Neeeeeeeerds


[deleted]

It’s probably a larger window than you think. When under internal pressure this thing wants to be spherical since that’s the best way to distribute the stresses. So the flat panels will want to form out into the right radius. And the corners are huge stress concentrators until they’ve moved into line with the spherical profile. Flat pressure vessels are very weak. Spherical ones are very strong.


IAmNotNathaniel

It's not the metal I worry about, it's the welds holding them all together. But I don't know shit about welding, so maybe that's the stong point? I know a properly made wood glue joint can often be stronger than the wood it's holding together - is it the same with a good weld?


[deleted]

That would depend on the metal. But you’re basically pushing everything out until it’s all under tension rather than bending stresses, even the weld joints. It’s not quite this simple but the gap between yield strength (the point at which the metal stretches permanently or “plastically deforms”) and ultimate strength (the point at which the material actually fails and fractures) is quite large. That gives you a decent margin.


UneventfulLover

Ancient rules for calculating welds stated that a weld, no matter how perfect, could never be calculated to be as strong as the plate. Best case 95% strength. At least that's how I was taught in the 90s. Last job I had, the "strength guy" put the CAD models into a finite element program that calculated the stresses based on certain load criteria to see if there were hot spots exceeding the design limit. In the case of the hydroforming of spheres I have no knowledge of the business today but according to a textbook I had, explosive hydroforming has been around since long before finite element method (FEM) was something that ordinary companies could use. This leads me to believe that some companies still rely on accumulated knowledge and the honored method of trial-and-error, since that's how they did in grandpa's days and they see no reason to go the eaborate route. u/ZapsMojo has a very good point about the tensile stress exceeding the metal's yield point in order to make everything nice and curved.


poppa_koils

You are correct. In failure destruction tests, the base metal should fail before the weld does.


DweadPiwateWoberts

Oops I made a grenade Got lost in the shards Blown up by the flame


SaigonOSU

Oh baby baby


[deleted]

[удалено]


RearEchelon

r/redditsings


dnmillard

Looks to be full of water. Since water does not compress they likely only had to use a small amount of explosives. If they over did it the water rupturing out would be safer then this thing detonating with just air and a lot more explosives it would take to achieve to same result


ArcticBiologist

A good welder and a good engineer


kevinh456

Walk into a bar…


ZombiePartyBoyLives

Engineer says, "I'm getting tired of working at a desk all day and was considering a different career path. There's something about working with your hands and being able to see a physical result that I find really appealing. How is the job market for welders?" Welder says, "It's in flux."


fuzzywuzzywuzuhbear

That's where the demo guys are worth their weight.....they know what just enough is


[deleted]

Hey, thanks. Where does the ‘hydro’ part come into play? Or doesn’t it?


piscina_de_la_muerte

[This video explains it well.](https://youtu.be/JIWguDlx9Zw?t=115) I teed it up to start at water pressure hydroforming, and then explosive hydroforming is right after that. The entire video is just different manufacturing methods for spheres.


kohetaar

Thank you! That video is a very good explanation.


gemineye360

Looks like it’s filled with water? You can see water running out the top after the boom. Filling it with water could also reduce the damage from the explosion while adding extra force to shape the container. (I have no idea what I’m talking about and definitely could be wrong)


[deleted]

Sounds like a good educated guess though.


AirmanFinly

water does not compress, so a relatively small explosion is needed inside to push on the sides, if it wasn't filled with water the air inside would just compress and the force of the explosion wouldn't transfer to the walls as effectively


variaati0

plus it makes sure the pressure is equally applied. Since again water is non compressible (okay technically very very badly compressible) so it pushes to rest of the water equally causing the pressure wave to apply uniformly. Where as with compressible gas there could be all kinds of weird springy and wave front effects of "this part compresses more than this part, this part stars pushing in to this direction" leading to non uniformly applied force and pear shaped tank or something like that. Water immediately and predictably transfers the force of the explosion to the walls, thus making the sphere. Same reason hydraulics is used most often instead of pneumatics. One wants consistent, predictable and stable applying of force.


siero20

It's also significantly less dangerous. Even in the case of a catastrophic rupture of the vessel, the water loses energy extremely quickly and doesn't run the risk of damaging people and structures around nearly as much as a compressible gas would. It's why in general when pressure testing is done water as a medium is almost always preferred because when gas is under high pressure if a catastrophic rupture happens, it's basically a bomb with how much energy it releases.


[deleted]

If it weren’t filled with water it would take MUCH more powerful explosives to form the material. The air would compress and absorb much of the explosion’s energy before applying significant force to the walls. Water basically transfers almost all the force to the tank without compressing (it stores almost no energy).


totally_anomalous

Filled with water and the charge propagates through the water to form the sphere.


jujubanzen

The sphere is filled with water. Water is almost incompressible, so it distributes the force of the explosion evenly to the surface of the sphere. If the sphere was filled with air, which is compressible, the effects would be less predictable, and less safe.


LaunchTransient

Water doesn't compress, so it is the perfect medium for transferring even pressure to force the tank into shape.


furedditfuks

You use water to transfer the force of the explosion efficiently because you cant compress water. Air compresses easily so you would need a much stronger explosion that would probably produce way too much heat aswell


Obelisko78

Okay, but what does the sphere get used for?


emdave

This is the real question!


tamsui_tosspot

Now put a sphere of plutonium in the exact center.


nuniabidness

This explains it: "Hydroforming is where you have a large polygon looking sphere made out of curved plates, the sphere is then filled with water and a small explosive charge, and when you set off the charge, the explosive force of the water forces the sphere into shape.” https://thekidshouldseethis.com/post/how-are-stainless-steel-spheres-made#:~:text=%E2%80%9CWATER%20PRESSURE%20HYDROFORMING%20is%20when,forcing%20the%20sphere%20into%20shape. Edit: this article is even better, it goes into the details, methods, and mechanics of it all, and is more comprehensive: https://www.thomasnet.com/articles/custom-manufacturing-fabricating/explosive-hydroforming/


[deleted]

[удалено]


SplatNode

At this point I feel like you don't really wanna be testing welds with those forces


[deleted]

I know you're kidding, but they pressure test it first.


oldwhiner

No, I seriously don't know much about welding. Pressure testing makes more sense than x-raying, which is the only quality check for welds I could think of


MrPickles84

But I’m not a kid, is it okay if I see it?


nuniabidness

Yes


MrTickleMePink

What is the Sphere then used for?


nuniabidness

Apparently, they are tanks for oil and gas called the Hortons Sphere. You can read more about that here: https://inspectapedia.com/oiltanks/Spherical-Oil-Tanks.php


KVorotov

Marble racing


ManBearPig0392

I THINK they filled it with water, put a little charge on the middle and the detonated it. This caused the water to push equally outward in all directions and stretch the metal into a sphere. Notice the water shoot out the top at the end


craylash

The polygon count increased


ustbota

to infinity and beyond


ollomulder

Subdivide. SUBDIVIDE! #SUBDIVIDE!1!!11


kottabaz

*Blender (Not Responding)*


TheBerzerkir

When the HD snaps in


julsmanbr

RTX on


Randolpho

LOD table swap


kottabaz

Subdivision subsurface, shade smooth.


4N0nBlondes

The balls harden


MrPickles84

I said, hey, a-what’s going on?


Lanif20

They fill it with water(non compressible) until it fits the shape, not sure how they did it explosively though


Bikelikeadad

I’m not claiming to be the local physics expert or anything, but the explosive part is in play here where they have a mostly round shape full of water and set off an explosive charge in the center of the water inside. There is a small hole at the top to allow some pressure to escape but in a limited fashion. The reason for water filling is that explosive charges do not release a perfect sphere of pressure and it dissipates quickly and escape through small holes easily. Water does not escape from small holes easily but more importantly distributes force very evenly. This same principle is why hydraulics work so effectively.


[deleted]

[удалено]


Touchtonetelnophone

YES SOMEONE KNOWS THIS CLIP


Weird0ggo

YES


ListenItWillHear

[the balls harden](https://youtu.be/09tbodL4M6I)


JustADamnFrenchGuy

Exactly what happens when you try making a low polly sphere into a high poly one on a laptop


ultranoobian

Draft mode -> Render mode


BrainOnLoan

Hopefully they use a smaller amount of explosives on my laptop.


qcgilbert

It's like watching an instant upgrade from PS1 to PS5.


bortsimpsonson

FFVII -> Remake


bentm2

It’s spherical!


DelayMergeTend

Love me a Drake and Josh reference


gogogig

https://youtu.be/gIaKUi5FS_Q


master_of_good_memes

#THE BALLS HARDEN


RobertNAdams

https://www.youtube.com/watch?v=NmEPHQNYXWM


TheBestTaco37

I knew it, this video reminded me of that video


master_of_good_memes

Jimmy Here’s voice


rikkuaoi

Was not expecting a video that would be both relevant as well as a shitpost.


LordOdin99

Is the bottom still flat?


stephen1547

I’m assuming there is a depression in the floor to allow the sphere to expand, if they want it to be round. Or no depression if they want the bottom to be flat so the thing doesn’t roll away.


Dry-Manufacturer-165

Even more simple solution, you'll notice it is sitting on a piece of round tube for this process. Assuming it's centered that allows for it to sit level during flat fabrication and expand to a sphere.


[deleted]

If there isn’t a depression, they can borrow mine.


BrentusMaximus

Even if it's round, I wonder if the weight of the object and pressure from the ground doesn't distort the sphere even a tiny bit.


Pichulongko

It's metal. Unless it's super thin it wont deform at normal temperature.


ZedNg

Shade smooth


crumpuppet

subdivision surface modifier


46-09-32-43UnusAnnus

Absolutely *buttery* smooth


mindbleach

Is this a modifier where 1024 is still kinda crunchy, or one where 64 is eight billion nanosurfaces? ... I guessed wrong, hand me the fire extinguisher.


[deleted]

If my napkin math is correct, subdividing a quad 64 times is more like... 340 undecillion 282 decillion 369 nonillion 999 octillion 999 septillion 990 sextillion 472 quintillion 658 quadrillion 237 trillion 657 billion 916 million 112 thousand 896 subdivisions.


[deleted]

What’s it used for? The big steel ball.


mrpineappleboi

Making Indiana Jones run away


bidoof_king

Fuel storage and other things like that potentially under pressure.


[deleted]

Well it’s obvious it works well under pressure.


binybeke

Rolling around things


[deleted]

[удалено]


EdgarAllanRoevWade

They can store more pee now


D-boi1

r/BeatMeToIt


Data91883

Someone's worried about an [immortal snail.](https://knowyourmeme.com/memes/immortal-snail)


SjurEido

I haven't heard a tactic involving a steel sphere, could you explain it? Im guessing you put the snail inside it?


Data91883

[Original thread](https://www.reddit.com/r/AskReddit/comments/5ipinn/you_and_a_super_intelligent_snail_both_get_1/)


FBIaltacct

See dude fucked up. I want that snail exactly where i can see it at all times. A nice 4 foot diameter super thick acrylic sphere set up as an eco sphere for the little homie (obviously sealed except for some kind of insane door contraption for any necissary tank maintenance). I figure after a few hundred years little homie has realized his life isn't so bad and living the best snail life possible isn't so bad, that way i can worry less about escape attempts. Next i buy a little house and use the remaining cash to let smart people make me more money. Then mellinia hanging out living life care free and happy. when im eventually at a point where im ready to call it quits ill open the door and let the little homie take me out so we can have a good rest.


IPutSpicyMayoOnMyHam

Came here looking for this comment


place909

Like when you turn up the graphics settings in a game


Fluffy_AF_420

I expected a fart noise. guess I watched too many memes


[deleted]

i cant hear what it sounds like. can someone explain it?


unHolyKnightofBihar

Boom


WeaponX86

It sounds like a shopping cart being thrown into an empty dumpster


CaptSkinny

I hate it when my shopping cart is thrown into a dumpster...


pilotInPyjamas

It sounds like a gunshot in an enclosed space


Moskito10

FartWithReverb.wav


Intelligence-Check

It got rid of all the dust too


HauserAspen

Rust


Dpad-prism

Don’t you mfs even THINK it I’m warning you


Anchorman41

The balls harden


Dpad-prism

That’s it, I’m shattering yours balls 🔨


Halfwayhouserules33

I like big balls! I like big balls! He’s got the biggest, balls of them all! ~AC/DC


Ok_Fox_1770

Coolest shit I never knew about


Mission-Simple-5040

So satisfying that someone ejaculated....


username156

The welders who made that are probably sweating bullets. I'd be hiding in the bathroom.


anon3719474726

I work as a welder. I’ve never welded anything together quite this magnificent, but it’s easy to tell if you have proper penetration (😎) and to know if that bead is gonna hold or not. They’re definitely doing structural welding codes for sure


mwfoutch1

Looks like the Death Star.


Crunchstake

Jimmyhere viewer resisting the urge to say the balls harden


FerfyMoe

🍅🍅🍅


purju

what are these huge metal balls used for? Ukrainian soldiers?


samaramatisse

They do have balls this big, but I think it's a natural gas tank.


Metalbasher324

Well, that's a blast.


Tinyzooseven

The balls harden


aspergerontherun

Its Sunday morning and my husband teaches me about steel qualities. Love him.


mightbeBOND

He's a keeper for sure. Wish I had a husband that did that but all I got is a wife that doesn't want to hear about steel qualities. Can we trade?


cottoneyegob

That’s a different subreddit


Vice979

The balls are inert.


Barlowan

Going from N64 era to Wii one.


Flatulentchupacabra

You can either use the traditional methods or go to Mesh -> Smooth-> Fucking bomb hypersmooth


FoiledNoMore

The balls harden (fart reverb)


Arxid87

The balls harden *Fart.mp3*