Which Shaft Transmits More Torque: Hollow or Solid?

  • Thread starter Thread starter vsp_6887
  • Start date Start date
  • Tags Tags
    Shaft Torque
Click For Summary
SUMMARY

The discussion centers on the torque transmission capabilities of hollow versus solid shafts under two conditions: equal diameter and equal cross-sectional area. It is established that a solid shaft transmits more torque when both shafts have the same diameter due to its higher polar moment of inertia. Conversely, when both shafts have the same cross-sectional area, the hollow shaft can transmit more torque because it has a greater polar moment of inertia relative to its weight, allowing for better performance in torsional applications. The importance of the second moment of area in determining shaft strength is emphasized.

PREREQUISITES
  • Understanding of torsion mechanics
  • Familiarity with polar moment of inertia
  • Knowledge of material properties affecting shaft strength
  • Basic calculus for torque calculations
NEXT STEPS
  • Study the polar moment of inertia for different shaft geometries
  • Learn about the material properties that affect torsional strength
  • Explore the application of torsion formulas in engineering
  • Review case studies comparing hollow and solid shafts in real-world applications
USEFUL FOR

Mechanical engineers, materials scientists, and students preparing for engineering interviews who seek to understand the mechanics of torque transmission in shafts.

vsp_6887
Messages
2
Reaction score
0
I have a two shaft 1) hollow shaft 2) solid shaft . both has same length.

Condition 1) If diameter of both this shaft is same, which shaft can transmit a more torque? how?

condition 2) If cross section area of both this shaft are same then which shaft can transmit more torque? how?

Please reply with calculation & theory & example if possible...
 
Engineering news on Phys.org
I think it's pretty obvious this is homework so I'll have to do my due diligence: what do you think? Have you done any work? What lectures have you had in class which discussed this?
 
Actually this is a question ask during my 1st interview..

I read earlier this & reply for condition i think 1 ) ans is solid shaft & for condition 2) Hollow shaft

But i do not find clear answer why ? what is the reason...
 
So I guess the interview didn't go well? Have you taken a class in this topic?

The strength of a shaft in torsion is controlled by its material properties, and the cross-sectional torsion constant a.k.a. the second moment of area. You may try calculating the shaft strength for each case using some made up numbers to see what you come up with, I think it could help with your understanding...

http://en.m.wikipedia.org/wiki/Torsion_(mechanics)
 

Similar threads

Torque calculations: Rotating vertical shaft
  • · Replies 5 ·
Replies
5
Views
5K
How to Measure Torque Required for motor to spin a rotating shaft?
  • · Replies 3 ·
Replies
3
Views
5K
Calculation torque of a drive at the torque arm
  • · Replies 5 ·
Replies
5
Views
2K
Torque required to rotate a hollow cylinder containing chips
  • · Replies 5 ·
Replies
5
Views
2K
Physics of Water in the Closed System of the Great Pyramid
  • · Replies 15 ·
Replies
15
Views
4K
Overhung load, extending output shaft
  • · Replies 1 ·
Replies
1
Views
3K
Help with flywheel / clutch calculations
  • · Replies 19 ·
Replies
19
Views
4K
Understanding Drive Shaft Stress and Deflection for Optimal Performance
  • · Replies 1 ·
Replies
1
Views
3K
How to couple/connect a shaft to a disk?
  • · Replies 4 ·
Replies
4
Views
3K
Tapered vs. Straight Shaft Pulley I/F
  • · Replies 12 ·
Replies
12
Views
7K