Burst disc calculation help

Because potatoes only last one shot!
Post Reply
User avatar
BigBang J
Specialist
Specialist
Posts: 109
Joined: Thu Jul 08, 2010 12:01 pm

Hey guys,

I know I've seen this on here somewhere bu I can't seem to find it.

How do you go about calculating the thickness of your burst disc to go with your burst pressure rating?

Thanks.
Top
User avatar
DYI
First Sergeant 5
First Sergeant 5
Antigua & Barbuda
Posts: 2862
Joined: Sat Jul 07, 2007 8:18 pm
Location: Here and there

Find a simplistic shear strength relationship for the thickness, diameter and pressure, then do some tests to approximate the effective shear strength in this situation. It ends up being linear, and is reasonably close in most cases. Due to the varying compositions and of aluminum foil, there will be at least some testing involved to generate useful numbers.
Spudfiles' resident expert on all things that sail through the air at improbable speeds, trailing an incandescent wake of ionized air, dissociated polymers and metal oxides.
Top
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26219
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 581 times
Been thanked: 347 times

It's fairly easy to do some practical testing, if you need moar pressure, moar layers!
hectmarr wrote:You have to make many weapons, because this field is long and short life
Top
User avatar
Gippeto
First Sergeant 3
First Sergeant 3
Venezuela
Posts: 2504
Joined: Sat Jan 19, 2008 10:14 am
Location: Soon to be socialist shit hole.
Has thanked: 2 times
Been thanked: 17 times

This might be of some help if the trial and error method doesn't appeal to you. :)

http://www.ansys.com/staticassets/ANSYS ... nf-227.pdf
"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
Top
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26219
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 581 times
Been thanked: 347 times

Gippeto wrote:This might be of some help if the trial and error method doesn't appeal to you. :)
If this is the case, what sort of a spudder are you :shock:

:D :D :D
hectmarr wrote:You have to make many weapons, because this field is long and short life
Top
User avatar
Gippeto
First Sergeant 3
First Sergeant 3
Venezuela
Posts: 2504
Joined: Sat Jan 19, 2008 10:14 am
Location: Soon to be socialist shit hole.
Has thanked: 2 times
Been thanked: 17 times

jackssmirkingrevenge wrote:
Gippeto wrote:This might be of some help if the trial and error method doesn't appeal to you. :)
If this is the case, what sort of a spudder are you :shock:

:D :D :D
One with VERY FEW "fails". :wink: :lol:
"It could be that the purpose of your life is to serve as a warning to others" – unknown

Liberalism is a mental disorder, reality is it's cure.
Top
User avatar
jackssmirkingrevenge
Five Star General
Five Star General
Posts: 26219
Joined: Thu Mar 15, 2007 11:28 pm
Has thanked: 581 times
Been thanked: 347 times

Gippeto wrote:One with VERY FEW "fails". :wink: :lol:
touché

:P :wink:
hectmarr wrote:You have to make many weapons, because this field is long and short life
Top
whoa044
Private 4
Private 4
Posts: 79
Joined: Thu Sep 23, 2010 7:03 pm

I have 40 Gauge copper sheets that I use as discs in my pneumatic HPA gun.

I have a 1/2" union, although the actual diameter of the disc that is open to air pressure is about 0.8" (I punch out 1 1/4" discs). They burst at 370-380 psi.
Top
Post Reply

Create an account or sign in to join the discussion

You need to be a member in order to post a reply

Create an account

Not a member? register to join our community
Members can start their own topics & subscribe to topics
It’s free and only takes a minute

Register

Sign in

  • Similar Topics
    Replies
    Views
    Last post

Return to “Ammo & Materials”