Stresses in a rotating object?

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SUMMARY

The discussion centers on the physics of a rotating disc and the implications of reaching relativistic speeds. When a disc rotates, the tangential speed at a certain radius can approach the speed of light, leading to significant time dilation and length contraction effects as described in special relativity. The stresses induced in the disc due to these relativistic effects can be calculated, and resources such as the rigid rotating disk FAQ provide detailed explanations of these phenomena.

PREREQUISITES
  • Understanding of special relativity principles
  • Familiarity with angular velocity and tangential speed
  • Knowledge of time dilation and length contraction effects
  • Basic concepts of stress and strain in materials
NEXT STEPS
  • Study the rigid rotating disk in special relativity
  • Explore calculations of stress in rotating objects
  • Research the implications of relativistic speeds on material properties
  • Investigate experimental evidence of time dilation and length contraction
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Physicists, engineering students, and anyone interested in the effects of rotation on physical objects at relativistic speeds.

billyboy
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Has anyone considered the following. If I have a really big disc and rotate it at a certain angular velocity. Then at some distance from the centre the tangential speed of the disc will equal the speed of light and any distance beyond will have a speed greater than that of light. Obviously this cannot be the case and some strange time dilation and length contraction effects will take place. Can anyone explain exactly what does happen? Presumably some stresses are set up in the disc which could be calculated?
 
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