×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Calculating Burst Pressures

Calculating Burst Pressures

Calculating Burst Pressures

(OP)
I'm working on a tight tolerance design, and i need to calculate a burst pressure for the main body of the part and also the oring groove. Could someone send me in the right direction? What equations should be used? I'm assuming this would be considered and treated as a thin-walled pressure vessel...

OD of Body=1.738"
ID=1.5"
OD of o ring groove=1.582"
Oring groove is .27" wide
Material is 4140 Q&T, MYS=110ksi

RE: Calculating Burst Pressures

As a first approximation for burst pressure, you could use the standard hoop stress formula for a thin-walled cylinder;

hoop stress = (pressure * outer radius)/wall thickness

Set the hoop stress = ultimate tensile strength, and solve for pressure

The o-ring groove will be the source of stress concentration, and most likely will be the location of failure.

You could use this same equation and substitute the ligament thickness for wall thickness (wall thickness - o-ring groove depth) and solve for burst pressure.

RE: Calculating Burst Pressures

I believe Harvey in his "Presure Vessel Design" has a chapter abothis.

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources