Damage by tire blowing up at 203 mph

  • #1
Tachyon son
38
2
Hi all,

We have a discussion among friends after this video:





For sure the energy involved in a tire spinning at those speeds is massive enough to create these damage:
7a2e792s-960.jpg

87c0e52s-480.jpg





But what kind of energy is exactly the one which directly produces that body rip?
Rotational kinetic energy?
Centrifugal?



Thanks a lot.


PS: That tire is spinning circa 40 revolutions per second at that speed.
 

Answers and Replies

  • #2
jbriggs444
Science Advisor
Homework Helper
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But what kind of energy is exactly the one which directly produces that body rip?
Rotational kinetic energy?
Centrifugal?
Once the tire comes apart, it seems most convenient to treat its pieces as individually having kinetic energy due to their motion. Since we are talking about damage to the [much more massive] car, one would use their kinetic energy in the car's rest frame.

On the other hand, if the fragments retain coherence, they will individually be spinning. If for instance, a large portion of the tire carcass is spinning, detached from the wheel, I would agree that rotational kinetic energy seems a more appropriate notion.

Of course, both are the same number.

Centrifugal force is not a form of energy.
 
  • #3
Lnewqban
Homework Helper
Gold Member
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That kind of damage seems to be produced by the whipping effect of lenghts of fabric-rubber long pieces that remain attached to the rim (via steel ring in bead of tire) while it is still able to rotate supplying some torque.
Note the interior side of the tire's ring still attached to the rim, although it moved to the exterior side.

This is also an all-wheel-drive car, which may have had power being supplied to that right front tire at time of rupture.
If so, being suddenly unloaded, the rpm's of that rim could have reached a higher value via the differential.
That engine is able to provide more than 450 HP, while the body material close to that tire is light but not very strong against impact.

Please, see:
https://en.m.wikipedia.org/wiki/Nissan_GT-R

:cool:
 
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