Maximum Stress/Torque for rotating shaft

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SUMMARY

The discussion focuses on calculating the maximum horsepower (HP) that can be transmitted by a 1.5” output shaft with a yield strength of 80-90 ksi. The key equations provided include Torque = (63025*H)/n and Force = Torque/radius. Participants emphasize the need to determine the maximum shear force to derive the maximum torque and horsepower, highlighting the importance of understanding the relationship between torque and maximum shear stress in rotating shafts.

PREREQUISITES
  • Understanding of torque and horsepower calculations
  • Familiarity with shear force and stress concepts
  • Knowledge of rotational mechanics
  • Ability to apply equations related to rotating shafts
NEXT STEPS
  • Research the equation relating torque and maximum shear stress in rotating shafts
  • Explore methods for calculating maximum shear force in mechanical systems
  • Learn about material properties and their impact on shaft performance
  • Investigate the effects of RPM on torque and horsepower transmission
USEFUL FOR

Mechanical engineers, students studying rotational dynamics, and professionals involved in shaft design and analysis will benefit from this discussion.

icycoolguy
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Homework Statement



Given a 1.5” output shaft, a 80-90 ksi yield strength.
Neglecting limitations of keys or gear reducer what is the maximum HP that could be transmitted by the 1.5” shaft


Homework Equations



Torque = (63025*H)/n H is HorsePower and n is RPM

Force = Torque/radius

The Attempt at a Solution



If I can find the maximum force then the maximum torque/HP can be calculated using the above equations. I m not sure how to calc the max shear force using the given data.
 
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You need an equation that relates torque and maximum shear stress in a rotating shaft. That equation should be given (or derived) in your class. If that's not the case (which would be very odd), you can always try Google.
 
Last edited:

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