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

Tyre Explosion Force/Energy Calculations

Tyre Explosion Force/Energy Calculations

Tyre Explosion Force/Energy Calculations

I have been tasked with proving that it is safe to handle off the road tyres fitted to haul trucks while still inflated to 5PSI (the procedure wants us to go to 0 PSI but this causes the tyre to slip from the rim and damage valves). However, i can only find calculations for explosions that involve some form of combustible material rather than just a sudden release of compressed gas.

The tyre has a volume of 4.8 m^3 and the pressure is 5 PSI, i did find this equation:

w = ((p1 v1)/(k-1))(1-(p1/p2)^((1-k)/k))

which gives an energy of 130 kJ at 5 PSI (equivalent to 30g of TNT)
however, this seems a little low and i ran the calcs again for operating pressure (100PSI) which gave a value of 4.2 mJ (equivalent to .93kg of TNT) which also seems very low, which is largely anecdotal comparing videos of exploding tyres vs even 2 kg of TNT but this may be due to the shaped nature of the explosion on a tyre (the lock rings usually fail so the energy is forced out the circumference of the rim).

If anyone can verify that this is the correct formula or suggest your own or even provide a range where energy releases start to become dangerous ie. above 200 kJ at 2m it will shatter windows or something along those lines.


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! Already a Member? Login


White Paper - Implementing a Multi-Domain System
IoT systems are multi-domain designs that often require AMS, Digital, RF, photonics and MEMS elements within the system. Tanner EDA provides an integrated, top-down design flow for IoT design that supports all these design domains. Learn more about key solutions that the Tanner design flow offers for successful IoT system design and verification. Download Now

Close Box

Join Eng-Tips® Today!

Join your peers on the Internet's largest technical engineering professional community.
It's easy to join and it's free.

Here's Why Members Love Eng-Tips Forums:

Register now while it's still free!

Already a member? Close this window and log in.

Join Us             Close