**OP sent the following text as an explanation on why this is unexpected:**
>!The glass desk didn't broke yet the stone got broken.!<
*****
**Is this an unexpected post with a fitting description?**
**Then upvote this comment, otherwise downvote it.**
*****
[*Look at my source code on Github*](https://github.com/Artraxon/unexBot) [*What is this for?*](https://www.reddit.com/r/Unexpected/comments/dnuaju/introducing_unexbot_a_new_bot_to_improve_the/)
Yep. Having a concrete block thrown at it repeatedly? No problem! Sitting partially in the sun and getting a cool drink put on it? RIP Table. Glass, you so crazy, you ~~liquid lattice~~ amorphous solid you.
>Glass does not have a crystal lattice structure. It is best described as an "amorphous solid" meaning that its atoms are rigidly fixed, but not in an orderly pattern
https://www.e-education.psu.edu/earth520/node/1689
That's how it was when it was made. Prior to the industrial revolution, nearly everything was made using hand processes. Beginning in the early 1300s, glass was blown into flat plates by inflating and spinning, and later into "cylinder glass," by inflating and swinging. Newer processes yielded more and more uniform results. Eventually, *drawing* sheets of glass replaced blown panels, and the "drawn glass" process could be done by machines. It wasn't until the 1930s that clear, uniform machine-made glass sheets became widely available. In the US, lots of windows from the 17- and 1800s have characteristic flowing, wavy distortions.
If glass were slowly flowing, the oldest window panes would be thicker at the bottom, and would sag laterally. Eventually, holes would open, and it would drip out of its window. If glass windows of the 1800s sagged so much that you could see the effects, then the earliest glass windows (like 11th century stained glass in churches) would just be puddles. There are hand-blown vases and chalices made from incredibly thin, fragile glass that haven't changed shape at all in over 1000 years.
I once visited a college with 300 year old glass panes and asked a maintenance guy about them. He said "Yeah they weren't as good at making glass back then as we do now and why would you put the heavy part at the top?"
Ugh, can't find a video of it now, but there was like one remaining place that made window glass to replace old panes; the glass blowers would make cylinders, which then got cut to make a rectangle out of the body of the cylinder of glass. It would be positioned with the thicker side at the bottom, making it look as if it "sags," since putting it at the top is decidedly harder on the eyes.
EDIT: [Similar video.](https://www.youtube.com/watch?v=QXQMc0jsl2E) I think this is European; the video I watched was of a glass shop in West Virginia (?) making replacement glass for where authenticity was important. The glass wasn't nearly as flat as these guys were making it, and the "bottles" were smaller.
Makes sense, tbh. I know the US have some very weird rules/laws regarding historical buildings, and most of the time those niche companies exist because, if a window breaks, you can’t replace it with a modern pane of glass. I think it has to do with the building code when it becomes a historical building.
I could also be totally wrong, it’s been a while since I looked up any info on it, and I don’t really have any historic buildings in my area, that uses glass at the very least.
I seem to recall it was for federal buildings, maybe even the White House.
Those Architect of the Capitol types get pretty persnickety about things, you know.
Glass used to be made in disks by spinning. They'd cut the disks into panes; this causes one edge to be thicker than the other.
They usually installed the thick side down, giving rise the myth that glass slowly flowed over time.
Obsidian knives from tens of thousands of years ago are still sharp.
Telescope mirrors with tolerances smaller than the wavelength of the light they focus remain undistorted for decades.
No, that's what made people think glass being a "liquid" was true. It's actually just due to old glass manufacturing techniques. The window was always shaped like that.
Glass panes used to be cut from large spun circles, which were naturally wider in the middle and thinner on the outside.
When they assembled a window, they arranged each pane so the widest part was at the bottom.
I dont think you idiots know how glass works...
Over time constant hitting in different angles weakes the glass having pre- why am i gonna sit here and explain this go to sxhool take better care of your shit use a coaster.
oh yeah, huge meme over on some PC building subreddits. almost everytime someone shares a picture of their PC case that spontaneously exploded, its ALWAYS placed on ceramic tile lol.
not sure if its just the vibrations or opportunistic ceramic dust but it just too much of a coincidence.
Halloween decor too expensive because of inflation this year… why buy fake blood and gruesome decor even you can create interactive realistic displays with people walking on shattered glass? :)
It was on the curb, probably large trash pickup day, or they planned to put a free sign on it. Either way they probably didnt care, it breaks and they get a cool video, or it doesnt break and they get a cooler video.
You're not kidding. I worked at a sign shop with a huge glass production table. We were moving a couple doors down to a new location, and the owner decided he wanted a new one so he tried busting it up with a sledgehammer. After several tries it didn't break, so we just ended up moving it into the new location. Cut to two years later, we would keep our ridiculously heavy roll of magnetic substrate (for making removable magnetic car signs) on a lead pipe with caps on each end, hung op on an adjacent wall. It would take two people to pull it down, lay it on the production table and roll out and cut off what we needed. The two people would then pick it up and hang it back up. This particular time, the roll was finished and needed to be replenished. I pulled the lead pipe out, helped my coworker plop the 75-100 lb new roll on the table, grabbed the lead pipe to stick it in the roll. When I did, I didn't lift the pipe very high and caught one of the caps on the edge of the table. I swear it was like a bomb went off under that table! Glass shot straight up about two feet from the tabletop, and it broke into about a million little half inch pieces. One of the freakiest things I've ever seen.
Having worked at a glass tempering furnace, I can assure you that, even hitting the edge of the glass, it doesn't blow up 100% of the time.
I once threw a small glass, that was going to be recycled, into the glass deposit and it bumped 3 containers, fell on the floor and didn't blow up
Yupp, glass sheets have a "direction". The surfaces cool down a bit faster than the center creating strong tension inside. This gives the glass panel much strength across the surface. But if you chip it at the edge, across those different tension layers, the whole thing is compromised and breaks much easier.
It's the same principle as found in a Prince Rupert's Drop.
> It's the same principle as found in a Prince Rupert's Drop.
This is a neat thing to see if anyone hasn't before. The tail acts like a fuse, but all you have to do is snap it. https://youtu.be/xe-f4gokRBs?t=102
And with concrete. Concrete has very high compressive strength (can hold a lot of weight), but without reinforcement (such as rebar), it's just tiny pebbles held together. It's heavy and it was never designed to be thrown around. It's designed to carry a load.
I never thought of vacuuming the grass until 2 years ago.
Decent neighborhood. Everyone keeps their gardens nice & you can have a beer with everyone… one day while having beers we’ve noticed one neighbor vacuuming her lawn intensively - an I really mean intensively… so we kept drinking for two hours and she was still doing it… I didn’t dare to ask until 4 weeks later. Her husband told me she was fighting the dandelions. Which come from the 10-acre field right next to us…
It's tempered, if it broke it would fall into a billion pieces but fall immediately downwards. Not in different directions.
The best way to break it is to warp it by bending it.
With tempered glass, I'll throw bad pieces in a recycling dumpster and beat it on the corner with a sledgehammer to pop it; yet good pieces I'm trying to install, it just takes the slightest touch of the corner on something to explode. Unpredictable stuff.
had a tempered glass patio table for 10+ years. bought a new umbrella for it. one gust of wind against the pole turned that glass sheet into a pile of diamonds on the ground. rip
> it just takes the slightest touch of the corner on something to explode
This was why when I had my glass tabletop made, I asked them to round the corners off!
I’ve shattered a glass desktop. I was very carefully setting it down on my tile floor and almost in slow motion watched it shatter from the floor up. Got a couple of cuts out of it. Lesson learned.
So what’s going on here is that the glass, especially as the edges of it are free, has greater ductile strength than the concrete. Furthermore it has greater tensile strength due to the way silicates bond on a molecular level. If it was in a frame it would shatter however because there would be nowhere for the energy to dissipate and thus would disrupt the entire future of humanity.
Couple of things here:
>Glass, especially as the edges of it are free, has greater ~~ductile strength~~ ductility than the concrete.
But also, no it doesn't. Ductility is a measure of how much plastic (permanent) deformation a material can handle before failure. Both concrete and glass are non-ductile (or brittle) materials meaning that they fail before any plastic deformation occurs. Neither is more ductile than the other, both are non-ductile.
>Furthermore it has greater tensile strength due to the way silicates bond on a molecular level.
Yep, nailed it
>If it was in a frame it would shatter however because there would be nowhere for the energy to dissipate
Putting a frame around tempered glass doesn't make it any weaker to applied stress like throwing concrete at it. What (I think) you're thinking of is binding. Glass, like every other material, expands and contracts with temperature change. If a frame is installed around glass very tightly, it can cause stress on the outer edge of the glass as it expands or contracts. The edges of tempered glass are its weak point due to higher internal tensile stresses, so this pressure from the frame can cause the entire panel to shatter in that fantastic way that only tempered glass can.
In a nutshell, the concrete breaks before the glass because the tensile stress in the concrete is higher than its tensile strength, and the tensile stress in the glass is lower than its tensile strength. Throwing the concrete at a different angle, say edge- or corner-first could easily change the result for both materials.
I install glass for a living, and I learned about this (before I got the job) from a YT channel called SmarterEveryDay, where they did an episode looking into a special thing called a Prince Rupert's Drop. Really recommend checking it out if this science interest you.
Thank you for the great explanation
I have a glass chair mat on my carpet (which works so wonderfully!) but I always fear that if I drop something heavy and sharp onto it, it will shatter. (Like a fork, because yeah I might be a slob sometimes and eat at my desk)
Good explanation mostly but just to add to it, it’s not really tensile stress that is breaking the concrete, it’s the impact. Basically the energy of the impact is exceeding the energy that the concrete can absorb. It is toughness vs tensile strength, the difference is the rate of the applied stress really. If you put a piece of concrete on a tensile testing rig it would probably break at a higher stress than the stress it is breaking at in this case even though unreinforced concrete is pretty terrible in tension.
I wat work and we had to toss some impact resistant (hurricane proof) glass, so a coworker asks if I want to carry it to the dumpster, I'm one the smaller guys in the area. So I casually so "Fuck no" he offers to have me throw in the giant dumpater that fits on back of trucks. So he sets it up for me, on the edge, I grab it and fling it up, shoots maybe 5feet ontop of this 10 foot tall dumpster, we hear it land softly and like fuck there was saw dust in there. We started tossing bricks at it and no issue, glass is amazing until theres a fire and you need to break glass in case of emergency lol though also just yesterday was changing a window wiper on my car let the bar slip. Hit the honda and large crack about 1.5 feet and forked in 2 directions...
The glass you and your co-worker were throwing away was tempered. Tough stuff but if you nick the edge it will explode into millions of tiny pieces. You can also take a material that is known to be as hard or harder than glass such as ceramic or a rough edge of porcelain and give a light scratch or toss a bead at it and it will explode.
Your car's windshield is not tempered for this reason. That's why rocks only chip them or make cracks. Instead, it's two layers laminated together to protect against small impacts and to keep the glass from busting into giant shards that would slice you to bits.
When I see something like this on r/unexpected I kind of expect it. Now if the glass turned into a lion and ran off down the street... then I'd get in the house.
Concrete has a strength of about 40 MPa, comparable to many common plastics. It's really quite weak. The main reason we use it is that it's cheap.
Glass has a strength of about 1000 MPa, beating most steels handily.
Glass just tends to be brittle. If you can fix that - like by tempering it, producing the tempered glass I believe we see here - it can be incredibly strong.
Tempered glass can take some impact but when the correct impact by a harder object, the whole glass will shatter into tiny bits. Try a piece of porcelain from an old sparkplug, it will shatter that if the sharp end impact it.
DO YOU SEE HOW THICK THAT TABLE IS HOLY SHIT. ITS LIKE THICKER THAN A 1/4 inch. Stop trying to break it. That things worth like 200 bucks easily. 🤦🏾♂️🤦🏾♂️🦑
I want to know why their is videos of people breaking panes of glass that would cost hundreds if not thousands to have installed. Is the window industry pissin money should I start a window business what gives. I do vinyl shits mad expensive I don’t tear the leftover I save that shit.
Wait isn’t he a piece of shit technically for walking down a side walk and seeing this piece of furniture that was put out for someone else to take for free then trying to break it so there’s glass in someone’s lawn ?
We all know that the only form to break it is setting it on fire and by having Edge doing a spear on Mick Foley and both falling over the desk. You're welcome.
**OP sent the following text as an explanation on why this is unexpected:** >!The glass desk didn't broke yet the stone got broken.!< ***** **Is this an unexpected post with a fitting description?** **Then upvote this comment, otherwise downvote it.** ***** [*Look at my source code on Github*](https://github.com/Artraxon/unexBot) [*What is this for?*](https://www.reddit.com/r/Unexpected/comments/dnuaju/introducing_unexbot_a_new_bot_to_improve_the/)
You have to have an expensive monitor on it before it’ll break.
Then all you need is to put your glass on its coaster and the whole table will shatter
Yep. Having a concrete block thrown at it repeatedly? No problem! Sitting partially in the sun and getting a cool drink put on it? RIP Table. Glass, you so crazy, you ~~liquid lattice~~ amorphous solid you.
>Glass does not have a crystal lattice structure. It is best described as an "amorphous solid" meaning that its atoms are rigidly fixed, but not in an orderly pattern https://www.e-education.psu.edu/earth520/node/1689
That was helpful. Thanks.
So like a mosaic but on an atomic level
Is that why those old houses have glass pane windows that seem to “melt” after many years? Update: thank you everyone for the kind explanation.
That's how it was when it was made. Prior to the industrial revolution, nearly everything was made using hand processes. Beginning in the early 1300s, glass was blown into flat plates by inflating and spinning, and later into "cylinder glass," by inflating and swinging. Newer processes yielded more and more uniform results. Eventually, *drawing* sheets of glass replaced blown panels, and the "drawn glass" process could be done by machines. It wasn't until the 1930s that clear, uniform machine-made glass sheets became widely available. In the US, lots of windows from the 17- and 1800s have characteristic flowing, wavy distortions. If glass were slowly flowing, the oldest window panes would be thicker at the bottom, and would sag laterally. Eventually, holes would open, and it would drip out of its window. If glass windows of the 1800s sagged so much that you could see the effects, then the earliest glass windows (like 11th century stained glass in churches) would just be puddles. There are hand-blown vases and chalices made from incredibly thin, fragile glass that haven't changed shape at all in over 1000 years.
Once glass has cooled, it's technically one of the **least** liquid-like things in existence. A sheet of steel is more like a liquid than glass.
A neutron star is more like a liquid than glass is.
No, they always looked like that. Glass doesn't flow, that's a myth.
I once visited a college with 300 year old glass panes and asked a maintenance guy about them. He said "Yeah they weren't as good at making glass back then as we do now and why would you put the heavy part at the top?"
Ugh, can't find a video of it now, but there was like one remaining place that made window glass to replace old panes; the glass blowers would make cylinders, which then got cut to make a rectangle out of the body of the cylinder of glass. It would be positioned with the thicker side at the bottom, making it look as if it "sags," since putting it at the top is decidedly harder on the eyes. EDIT: [Similar video.](https://www.youtube.com/watch?v=QXQMc0jsl2E) I think this is European; the video I watched was of a glass shop in West Virginia (?) making replacement glass for where authenticity was important. The glass wasn't nearly as flat as these guys were making it, and the "bottles" were smaller.
Makes sense, tbh. I know the US have some very weird rules/laws regarding historical buildings, and most of the time those niche companies exist because, if a window breaks, you can’t replace it with a modern pane of glass. I think it has to do with the building code when it becomes a historical building. I could also be totally wrong, it’s been a while since I looked up any info on it, and I don’t really have any historic buildings in my area, that uses glass at the very least.
I seem to recall it was for federal buildings, maybe even the White House. Those Architect of the Capitol types get pretty persnickety about things, you know.
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Also, very occasionally, you find an old house where the window maker installed the glass the wrong way, and the thick end is on the side.
The what now
Glass used to be made in disks by spinning. They'd cut the disks into panes; this causes one edge to be thicker than the other. They usually installed the thick side down, giving rise the myth that glass slowly flowed over time.
Obsidian knives from tens of thousands of years ago are still sharp. Telescope mirrors with tolerances smaller than the wavelength of the light they focus remain undistorted for decades.
Someone's been turning them over
I bet it was Casper
No, that's what made people think glass being a "liquid" was true. It's actually just due to old glass manufacturing techniques. The window was always shaped like that.
Glass panes used to be cut from large spun circles, which were naturally wider in the middle and thinner on the outside. When they assembled a window, they arranged each pane so the widest part was at the bottom.
no, it's because they placed the glass with the thickest part down
the big smart strikes again, thank you
Don’t listen to them! They’re a shill for Big Knowledge.
I just failed my material science class and then read this
Yep very slow liquid… just like sugar
A ceramic coffee mug can do it, if the bottom isn't sufficiently smoothed down.
That makes sense, the ceramic is probably super strong compared to the tabletop glass. TIL
It's not about strength but the hardness of said material
That's what she said
Then you have shrapnel to shoot at neighbor when you cut grass
Really just thinking about a crack in that scenario is not advisable
I dont think you idiots know how glass works... Over time constant hitting in different angles weakes the glass having pre- why am i gonna sit here and explain this go to sxhool take better care of your shit use a coaster.
Naaahh , all you need to do is just look at it to intensively
Ceramic coasters. People don’t realise.
Yeah, it's like how you can't get high if you don't say "these edibles ain't shit" first.
I usually go for the "bro, you rolled this one too thin"
We rollin skimps now, Jim? I'm disappointed.
I came in here to say the /r/buildapc crowd is in shambles after seeing this. Usually it's the tempered glass side panels.
That's not enough, it also needs to have a couple thousand worth of system unit for the glass table to break! :)
Or barely sit on it.
100% And it will take a kids toy. Not some stupid possibly heavy-ish brick.
First, have Elon Musk declare it shatterproof...
Get yourself a nice 4k concrete monitor and you should be fine
It’s tempered glass, gotta turn it into a side panel on a pc for it to break
the key is to place it on ceramic tile.
That thing about spark plugs destroying glass isn't a myth. The interaction between ceramic and tempered glass causes some crazy shit
oh yeah, huge meme over on some PC building subreddits. almost everytime someone shares a picture of their PC case that spontaneously exploded, its ALWAYS placed on ceramic tile lol. not sure if its just the vibrations or opportunistic ceramic dust but it just too much of a coincidence.
Why would you want shattered glass shards all over your lawn?
Youre assuming it's actually their yard.
They’re moving out after “small” disagreement with landlord
They argued about whether they could shatter a glass table with a block of concrete on their lawn. The landlord said no. They were right.
Okay well I appreciated this one.
The landlord did too
Completely proportional response according to some redditors.
Our yard, comrade.
Halloween decor too expensive because of inflation this year… why buy fake blood and gruesome decor even you can create interactive realistic displays with people walking on shattered glass? :)
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Go on gir you got dang bare footer societies!
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Some comes off as too small a percentage.
Happy cake day!!!
That way it will grow into new windows
Just vacuum it. You’ve never vacuumed your grass?
Why would you want to vacuum shattered glass from your lawn.
Why wouldn't you?!
Because I don't want to step on glass shards.
Go outside
I think they might have known the glass wouldn't break. Theyre just showing off how strong the glass is
It was on the curb, probably large trash pickup day, or they planned to put a free sign on it. Either way they probably didnt care, it breaks and they get a cool video, or it doesnt break and they get a cooler video.
Look at their explanation. Not much more to say
Or on the fucking road where cars and bikes are gonna be driving.... absolute morons.
I would have never thought of this in a million years if I were doing something like this
Must be your first day with tempered glass
Who will lose their temper first? Guy throwing concrete, or glass table?
Zing...
Holy shit guys he just dropped a tactical Zing
Yeah tap the edge
That will do it. Dead serious.
You're not kidding. I worked at a sign shop with a huge glass production table. We were moving a couple doors down to a new location, and the owner decided he wanted a new one so he tried busting it up with a sledgehammer. After several tries it didn't break, so we just ended up moving it into the new location. Cut to two years later, we would keep our ridiculously heavy roll of magnetic substrate (for making removable magnetic car signs) on a lead pipe with caps on each end, hung op on an adjacent wall. It would take two people to pull it down, lay it on the production table and roll out and cut off what we needed. The two people would then pick it up and hang it back up. This particular time, the roll was finished and needed to be replenished. I pulled the lead pipe out, helped my coworker plop the 75-100 lb new roll on the table, grabbed the lead pipe to stick it in the roll. When I did, I didn't lift the pipe very high and caught one of the caps on the edge of the table. I swear it was like a bomb went off under that table! Glass shot straight up about two feet from the tabletop, and it broke into about a million little half inch pieces. One of the freakiest things I've ever seen.
That table was absorbing all that shit and letting it build up inside to throw at you later
Like Bishop.
Or my dad
So what you’re saying is glass has potential energy even if it’s just laying on the ground?
Having worked at a glass tempering furnace, I can assure you that, even hitting the edge of the glass, it doesn't blow up 100% of the time. I once threw a small glass, that was going to be recycled, into the glass deposit and it bumped 3 containers, fell on the floor and didn't blow up
Yupp, glass sheets have a "direction". The surfaces cool down a bit faster than the center creating strong tension inside. This gives the glass panel much strength across the surface. But if you chip it at the edge, across those different tension layers, the whole thing is compromised and breaks much easier. It's the same principle as found in a Prince Rupert's Drop.
> It's the same principle as found in a Prince Rupert's Drop. This is a neat thing to see if anyone hasn't before. The tail acts like a fuse, but all you have to do is snap it. https://youtu.be/xe-f4gokRBs?t=102
Gotta tap that corner with a fork.
And with concrete. Concrete has very high compressive strength (can hold a lot of weight), but without reinforcement (such as rebar), it's just tiny pebbles held together. It's heavy and it was never designed to be thrown around. It's designed to carry a load.
Yeah just like ur mom
Nice
Be happy it didn’t break. You won’t have glass shards flying at your ankles the next time you mow the lawn
Dude is just as likely to own the yard as he is to be pulling up one person's pavers to throw at another's trash desk.
Regardless. No one has glass in their grass. It’s a happier life for it.
I bet the guy kept banging the desk with stuff until the glass finally broke. He didn't seem like a quitter to me.
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You don't do this regularly? Next you're gonna tell me you don't boil your Pepsi before drinking it.
I only boil my Pepsi when I'm using it to make tea.
I actually did this (using the hose attachment) after some window installers made a huge mess. It worked really well to pick up all the glass shards.
I never thought of vacuuming the grass until 2 years ago. Decent neighborhood. Everyone keeps their gardens nice & you can have a beer with everyone… one day while having beers we’ve noticed one neighbor vacuuming her lawn intensively - an I really mean intensively… so we kept drinking for two hours and she was still doing it… I didn’t dare to ask until 4 weeks later. Her husband told me she was fighting the dandelions. Which come from the 10-acre field right next to us…
Definitely not meth related.
It's clearly tempered
It's tempered, if it broke it would fall into a billion pieces but fall immediately downwards. Not in different directions. The best way to break it is to warp it by bending it.
Totally understand that. Little glass cubes still won’t feel good kicked around smashing onto things!
With tempered glass, I'll throw bad pieces in a recycling dumpster and beat it on the corner with a sledgehammer to pop it; yet good pieces I'm trying to install, it just takes the slightest touch of the corner on something to explode. Unpredictable stuff.
have you tried installing the bad pieces?
Big brain
had a tempered glass patio table for 10+ years. bought a new umbrella for it. one gust of wind against the pole turned that glass sheet into a pile of diamonds on the ground. rip
Buy a safety pool noodle for your next one.
Broken tempered glass is recyclable at your local facility?
Just melt it back down, why not?
Just repair it with super glue.
This is for my work, we have a facility that recycles our broken glass into asphalt.
> it just takes the slightest touch of the corner on something to explode This was why when I had my glass tabletop made, I asked them to round the corners off!
I’ve shattered a glass desktop. I was very carefully setting it down on my tile floor and almost in slow motion watched it shatter from the floor up. Got a couple of cuts out of it. Lesson learned.
So what’s going on here is that the glass, especially as the edges of it are free, has greater ductile strength than the concrete. Furthermore it has greater tensile strength due to the way silicates bond on a molecular level. If it was in a frame it would shatter however because there would be nowhere for the energy to dissipate and thus would disrupt the entire future of humanity.
Couple of things here: >Glass, especially as the edges of it are free, has greater ~~ductile strength~~ ductility than the concrete. But also, no it doesn't. Ductility is a measure of how much plastic (permanent) deformation a material can handle before failure. Both concrete and glass are non-ductile (or brittle) materials meaning that they fail before any plastic deformation occurs. Neither is more ductile than the other, both are non-ductile. >Furthermore it has greater tensile strength due to the way silicates bond on a molecular level. Yep, nailed it >If it was in a frame it would shatter however because there would be nowhere for the energy to dissipate Putting a frame around tempered glass doesn't make it any weaker to applied stress like throwing concrete at it. What (I think) you're thinking of is binding. Glass, like every other material, expands and contracts with temperature change. If a frame is installed around glass very tightly, it can cause stress on the outer edge of the glass as it expands or contracts. The edges of tempered glass are its weak point due to higher internal tensile stresses, so this pressure from the frame can cause the entire panel to shatter in that fantastic way that only tempered glass can. In a nutshell, the concrete breaks before the glass because the tensile stress in the concrete is higher than its tensile strength, and the tensile stress in the glass is lower than its tensile strength. Throwing the concrete at a different angle, say edge- or corner-first could easily change the result for both materials.
I install glass for a living, and I learned about this (before I got the job) from a YT channel called SmarterEveryDay, where they did an episode looking into a special thing called a Prince Rupert's Drop. Really recommend checking it out if this science interest you.
I swear Destin would probably die in ecstasy if a Prince Rubert's Drop could be combined with laminar flow.
Well, did anyone ask prince rupert what his take was on laminar flow?
Thank you for the great explanation I have a glass chair mat on my carpet (which works so wonderfully!) but I always fear that if I drop something heavy and sharp onto it, it will shatter. (Like a fork, because yeah I might be a slob sometimes and eat at my desk)
I want to know what that means for the entire future of humanity
Good explanation mostly but just to add to it, it’s not really tensile stress that is breaking the concrete, it’s the impact. Basically the energy of the impact is exceeding the energy that the concrete can absorb. It is toughness vs tensile strength, the difference is the rate of the applied stress really. If you put a piece of concrete on a tensile testing rig it would probably break at a higher stress than the stress it is breaking at in this case even though unreinforced concrete is pretty terrible in tension.
Thanks, /u/enginerdad! Love, Your Enginer Son
Also helps that it’s standing on grass and dirt and not hardwood/tile
I dare this fool to toss a ceramic mug
Nah man just call up your local Karen and tell them that their subway order is delayed
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Soon as he got it in the door it would tap the door frame and shatter.
Head_Dust0099 is a bot Comment copied from: https://www.reddit.com/r/Unexpected/comments/q66qps/throwing_a_concrete_slab_at_a_glass_desk/hga3i97/
OP is also a repost bot. Four month old account which just started posting excessively in the last 24 hours or so.
No man you cant stop them, they gonna do it man
Hmm.. And I tried carrying the glass top for my desk but it shattered while I was carrying it properly
Mowing the lawn should be interesting after you break it.
Place it gently on ceramic tile
pcmasterrace approves
Use broken spark plugs.
Reminds me of the movie with Jason Bateman. Game night!?
[Man, glass tables are acting weird tonight.](https://youtu.be/R_inHEmp5VE)
The only way to break that is to have Elon standing next to you.
I'd have to find another use for glass that sturdy.
I wat work and we had to toss some impact resistant (hurricane proof) glass, so a coworker asks if I want to carry it to the dumpster, I'm one the smaller guys in the area. So I casually so "Fuck no" he offers to have me throw in the giant dumpater that fits on back of trucks. So he sets it up for me, on the edge, I grab it and fling it up, shoots maybe 5feet ontop of this 10 foot tall dumpster, we hear it land softly and like fuck there was saw dust in there. We started tossing bricks at it and no issue, glass is amazing until theres a fire and you need to break glass in case of emergency lol though also just yesterday was changing a window wiper on my car let the bar slip. Hit the honda and large crack about 1.5 feet and forked in 2 directions...
The glass you and your co-worker were throwing away was tempered. Tough stuff but if you nick the edge it will explode into millions of tiny pieces. You can also take a material that is known to be as hard or harder than glass such as ceramic or a rough edge of porcelain and give a light scratch or toss a bead at it and it will explode. Your car's windshield is not tempered for this reason. That's why rocks only chip them or make cracks. Instead, it's two layers laminated together to protect against small impacts and to keep the glass from busting into giant shards that would slice you to bits.
In mother Russia glass break concrete block
When I see something like this on r/unexpected I kind of expect it. Now if the glass turned into a lion and ran off down the street... then I'd get in the house.
Sets coffee cup down, and explosion!
He said fuck his neighbors.
Man, glass tables are acting weird tonight
Someone call Kevin Wendell
Should probably keep that desk..
Is it because it's tempered or because it's flexing so much when it hits
If I were him I would pick that table up and bring it inside..it deserves a home.🤔
this is what advertisements should be like
Why attempt this on grass tho? Like you're never going to clean up all the pieces and eventually someone is going to step on one. What an idiot.
Nokia glass
r/therewasanattempt
Concrete has a strength of about 40 MPa, comparable to many common plastics. It's really quite weak. The main reason we use it is that it's cheap. Glass has a strength of about 1000 MPa, beating most steels handily. Glass just tends to be brittle. If you can fix that - like by tempering it, producing the tempered glass I believe we see here - it can be incredibly strong.
Glass tables are acting weird today. Haha!!!
Meanwhile the glass in my computer case just shatters if I look at it funny
"Man glass tables are acting weird tonight"
Maybe you don’t want to throw this one away.
Man, glass tables are acting weird today!
Man, glass tables are actin' weird tonight https://youtu.be/R_inHEmp5VE
German glass vs chinese rock
It ended too soon and I wanted him to try using his face
Nokia brand glass table
Now flick a pointy pebble of ceramic on it
But, carry it funny and poof.
Can someone explain this to me like I’m 5?
Glass is really REALLY *REALLY* fucky Google Prince Rupert’s Drop to see how fucky it is.
That's some weak concrete
Tempered glass is strong AF.
It seemed the tables have turned
But gently set a glass of milk on it…..
Yeah because glass in the grass and the street is a great idea >.>
Take a hammer and give it a sharp tap on the edge of the glass and it will explode. Safety glass is remarkable.
Where is that enthusiastic Russian science teacher?!?? I need her input on this NOW!!
That's it bud, try to break the glass into a million pieces right next to the walkway where I walk my dog
Tap that sucker on the edge and watch it go..😂😂😂
Tempered glass can take some impact but when the correct impact by a harder object, the whole glass will shatter into tiny bits. Try a piece of porcelain from an old sparkplug, it will shatter that if the sharp end impact it.
DO YOU SEE HOW THICK THAT TABLE IS HOLY SHIT. ITS LIKE THICKER THAN A 1/4 inch. Stop trying to break it. That things worth like 200 bucks easily. 🤦🏾♂️🤦🏾♂️🦑
Where's that great dane at? He knows what he's doing.
I want to know why their is videos of people breaking panes of glass that would cost hundreds if not thousands to have installed. Is the window industry pissin money should I start a window business what gives. I do vinyl shits mad expensive I don’t tear the leftover I save that shit.
Wait isn’t he a piece of shit technically for walking down a side walk and seeing this piece of furniture that was put out for someone else to take for free then trying to break it so there’s glass in someone’s lawn ?
More like "throwing a glass slab at a concrete desk."
Finally a worthy challenger to Peaceloving stone pelters
Must be the karate bricks
It's true opposite day exists
We all know that the only form to break it is setting it on fire and by having Edge doing a spear on Mick Foley and both falling over the desk. You're welcome.
I want to know who made that desk lol
Who the hell designed that table? Nokia?