How to measure the force generated by a tyre when it fails?

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SUMMARY

This discussion focuses on calculating the force generated by a tyre failure, specifically a 35 x 11.5-17 tyre inflated to 255 psi, with a maximum supply of 300 psi. The key calculation involves understanding the energy stored in the compressed air within the tyre, which is released suddenly upon failure. The analysis emphasizes the adiabatic expansion of air and suggests using a rocket thrust calculator to estimate the force generated during the blowout. The discussion also highlights the importance of stress distribution analysis within the tyre structure to determine failure points.

PREREQUISITES
  • Understanding of adiabatic processes in thermodynamics
  • Familiarity with stress analysis in materials
  • Knowledge of energy calculations for compressed air
  • Experience with numerical methods for dynamic pressure changes
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  • Research energy calculations for compressed air in tyres
  • Learn about adiabatic expansion and its implications in tyre failure
  • Explore rocket thrust calculations and their application in estimating forces
  • Investigate stress distribution analysis techniques for materials under pressure
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Engineers, safety professionals, and researchers involved in tyre design, failure analysis, and safety compliance, particularly those working with high-pressure systems.

mel1
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Hello everyone,

I am trying to work out how much force is generated when a tyre fails at a certain pressure. The tyre will be inside an OSHA section 1910.177 compliant tyre cage.

What calculation would be used to solve the following?:

The tyre size is 35 x 11.5-17 with a rated inflation of 255 psi.

Maximum supply available to the tyre is 300 psi.

I need to know what force/shockwave/energy is released if the tyre were to fail inside the cage.

Worst case scenario is the tyre sidewall splits with all stored pressure/energy being released in one direction.

Thanks for your time.
 
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The tire fails when the strength of one of the materials contained within the tire construction is exceeded. This is characterized by the state of stress within the material at the failure pressure. An analysis of the stress distribution within the tire structure can be carried out to establish the state of stress at a given pressure.
 
A couple thoughts:

There is a volume of air at a pressure inside the tire. The energy in that volume of air at that pressure can be calculated. All of that energy is released suddenly when the tire blows. If you are not familiar with the calculations, google energy in compressed air. The expansion will be adiabatic.

If a hole blows in the tire, the escaping air is short lived rocket engine. Google rocket thrust calculator to learn more. One of the good hits is NASA. The pressure drops rapidly, so the easiest way to find the velocity of the tire is by using a numerical solution.

Or you can simply google exploding tires and watch a few videos. You can estimate forces from the damage shown.
 
Thank you both for your input.