What happens when a steel wheel explodes due to centrifugal force?

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Discussion Overview

The discussion revolves around the consequences of a steel wheel exploding due to centrifugal force when spun at high speeds. It touches on the energy dynamics involved in such an explosion and the implications for engineering, particularly in the context of jet engine design.

Discussion Character

  • Exploratory
  • Technical explanation
  • Debate/contested

Main Points Raised

  • One participant inquires about the consequences of a steel wheel exploding due to centrifugal force and whether they are creating the energy of the explosion.
  • Another participant asserts that spinning a steel disk fast enough can lead to a high-energy explosion, referencing tests conducted on gas turbine disks.
  • A participant clarifies terminology, suggesting that "fail the steel" could be interpreted as "disintegrate the steel."
  • It is explained that energy is not created by the individual but rather transferred from an energy supply to kinetic energy as the disk spins, with the explosion resulting in metal fragments flying at high speed.
  • Concerns are raised about the catastrophic implications of disk failure in jet engines, emphasizing that such failures must be prevented through design and testing.
  • A participant mentions their current design of a three-disk system that is within the critical radius, making disk failure impossible, but acknowledges that larger or hotter turbines would require additional safety measures.

Areas of Agreement / Disagreement

Participants express varying degrees of understanding regarding the energy dynamics involved in the explosion and the terminology used. There is no consensus on the implications of the explosion beyond the acknowledgment of its potential dangers in engineering contexts.

Contextual Notes

Some assumptions about energy transfer and the definitions of failure in materials are not fully explored. The discussion does not resolve the complexities of energy dynamics or the specific engineering measures required to prevent disk failure.

Who May Find This Useful

Individuals interested in mechanical engineering, materials science, and safety design in high-speed rotating machinery may find this discussion relevant.

alangularte
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What are the consequences of the explosion of a steel wheel by the action of centrifugal force and spinning at high speed?

Am I creating the energy of this explosion?
 
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If you spin a steel disk fast enough to fail the steel, it will be a very high energy explosion. This test has often been done in the past on gas turbine disks in a spin pit.
 
Pkruse said:
If you spin a steel disk fast enough to fail the steel, it will be a very high energy explosion. This test has often been done in the past on gas turbine disks in a spin pit.

Thanks for your answer!

I'm sorry, but my English is not very good. When you say "fail the stell", you may say "disintegrate the steel"?
 
Yes. In English call it "testing to failure" (or "destructive testing") when we keep adding stress to something, just to see at what point it wll break.
 
To answer your other question, you are not creating any energy. You have an energy supply, probably the power grid. You are transferring it into kinetic energy to make the disk spin. When the disk breaks, that energy is now in the form of metal fragments flying in random directions at high speed. When designing a jet engine this is the one failure that we cannot tolerate because we cannot armore the rest of the aircraft well enough to prevent damage serious enough to cause a crash. The pieces will fly straight through the airplane as if it were not there and maybe also the engine on the other wing. So we design the engine so as to make this failure impossible, and we do whatever testing we need to make sure of it. I'm designing a three disk system right now which is completely within the critical radius, so disk failure is impossible. But if the turbine were bigger or hotter, I'd have to take additional measures to prove that disk failure was impossible.
 

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