Reply
 
Thread Tools Search this Thread
  #11  
Old 28-02-2022, 09:11 AM
aron_crow aron_crow is offline
Member
 
Join Date: May 2020
Location: India
Posts: 82
aron_crow is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
Love this thread. Some really interesting revelations.
This probably also explains why pin pops leaves big shreds and why sit pops breaks it into a million pieces.

Last edited by aron_crow; 28-02-2022 at 09:14 AM.
Reply With Quote
  #12  
Old 01-03-2022, 02:54 AM
RubberTech RubberTech is offline
Member
 
Join Date: Jan 2022
Location: California
Posts: 51
RubberTech is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
The key parameter controlling the size of the shreds and the bursting of the balloon itself is not the internal pressure but the stress in the rubber membrane, which depends not only on the pressure but also on the thickness and curvature of the membrane. The higher this stress, the faster the crack moves to dissipate the stress when the balloon pops. But there's a limit to the speed a crack can travel through rubber so when the stress goes above this threshold, the only way the crack can dissipate stress faster is to split into more cracks. In other words, the higher the stress, the more elastic energy is stored in the balloon, and then the more numerous the fractures need to be to release the stored energy. So a balloon that is B2P will usually produce more smaller shreds and a balloon that is popped with a pin will release all its stress along two or three cracks and result in just a few large pieces.
Reply With Quote
  #13  
Old 04-03-2022, 01:26 AM
Asclepio Asclepio is offline
Senior Member
 
Join Date: Sep 2018
Location: At the tuftex factory (In my dreams)
Posts: 418
Asclepio is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
Wow Rubbertech, your answers really exceed the average, thanks for explaining some physics to us mere mortals c:
__________________
A looner looking for fun, against violence or people with hightened moral idealism…. I just care about loons, so don’t ruin the fun.
Reply With Quote
  #14  
Old 04-03-2022, 03:32 AM
zhilman zhilman is offline
Senior Member
 
Join Date: Dec 2018
Location: Malaysia
Posts: 131
zhilman is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
Originally Posted by RubberTech View Post
The key parameter controlling the size of the shreds and the bursting of the balloon itself is not the internal pressure but the stress in the rubber membrane, which depends not only on the pressure but also on the thickness and curvature of the membrane.
Does this means that at smaller sizes, if the balloon fails, the fracture will not result in shreds because of the high thickness of the balloon when it was small in size?
Reply With Quote
  #15  
Old 04-03-2022, 06:56 AM
RubberTech RubberTech is offline
Member
 
Join Date: Jan 2022
Location: California
Posts: 51
RubberTech is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
At a smaller size there is not as much surface tension on the balloon membrane so the lower stress means the crack doesn't have to move as fast to dissipate the stress when the balloon pops. Also, at a smaller size or when underinflated, the cause of a failure is usually due to a flaw or weak point in the latex meaning the stress will dissipate along one or two cracks emanating from the weak point.
Reply With Quote
  #16  
Old 05-03-2022, 07:22 AM
aron_crow aron_crow is offline
Member
 
Join Date: May 2020
Location: India
Posts: 82
aron_crow is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
Has anyone done some measurements on the sizes of the balloons vs the popping loudness (in db).
I tried that with 9" and 11" balloons and found them to nearly be the same (using an android app to measure the sound), there was very less background noise but I feel that the results were inaccurate. Would love to see if anyone else had the same idea.
Reply With Quote
  #17  
Old 05-03-2022, 09:14 AM
heleo heleo is offline
Member
 
Join Date: Aug 2015
Posts: 71
heleo is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
The balloon pops are very loud, you phone is going to clip and not be able to record the peaks.
Reply With Quote
  #18  
Old 05-03-2022, 04:15 PM
srob2 srob2 is offline
Senior Member
 
Join Date: Dec 2017
Posts: 236
srob2 is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
"A Weight" vs "C Weight" is going to make a big difference for larger balloons. Both are probably relevant. A high "A weight" is going to sound loud, but a high "C weight" will shake the room and possibly the neighbors.

168 is quoted all over the internet for a Unique 9" b2p.

The "A weight" are going to be about the same for different sizes - of course Belbals and Tuftex will be louder than Uniques. "C weight" will be higher the larger the balloon.
Reply With Quote
  #19  
Old 05-03-2022, 06:11 PM
Common Loon Common Loon is offline
Senior Member
 
Join Date: Aug 2020
Location: Massachusetts, USA
Posts: 232
Common Loon is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
Pop-science is one of my favorite topics ever

Here's something I'm still wondering about. When a balloon pops at very low strain - say, because of an unseen defect in the latex - it always bursts into only one or two big pieces. But it also tends to make a serrated, jagged edge on the shreds (like this shape, LOL: https://www.desmos.com/calculator/nj84rzlzp9 ).

I have a theory about why this happens, and only happens in low pressure bursts, but I'm interested to hear others' thoughts!
Reply With Quote
  #20  
Old 06-03-2022, 06:12 AM
aron_crow aron_crow is offline
Member
 
Join Date: May 2020
Location: India
Posts: 82
aron_crow is on a distinguished road
Default Re: How about some scientific approach on balloon popping? :-)
Originally Posted by srob2 View Post
"A Weight" vs "C Weight" is going to make a big difference for larger balloons. Both are probably relevant. A high "A weight" is going to sound loud, but a high "C weight" will shake the room and possibly the neighbors.

168 is quoted all over the internet for a Unique 9" b2p.

The "A weight" are going to be about the same for different sizes - of course Belbals and Tuftex will be louder than Uniques. "C weight" will be higher the larger the balloon.
168 db? wow. My phone measured somewhere along the lines of 95-100 db.
Reply With Quote
Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT. The time now is 01:31 AM.


Powered by vBulletin®
Copyright ©2000 - 2022, Jelsoft Enterprises Ltd.