What is the difference between hollow shaft and solid shaft?
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What is the difference between hollow shaft and solid shaft?
The strength of the hollow shaft is more than the same weight solid shaft. Hollow shafts have a more polar moment of inertia, which enables them to transmit more torque than solid shafts. Hollow shafts do not transfer more power but the power to weight ratio of hollow shafts is more as compared to the solid shaft.
What is the maximum shear stress on a hollow shaft?
100 MPa
The maximum allowable shear stress – τmax – in the shaft is 100 MPa.
Why a hollow shaft is stronger than a solid one of the same mass?
The stiffness of the hollow shaft is more than the solid shaft with the same weight. In the hollow shaft, the material at the centre is removed and spread at large radius. Therefore, hollow shafts are stronger than solid shaft having the same weight.
Why hollow shaft is preferred over solid shaft?
For a load-bearing type of shaft, then its always better to choose a hollow shaft because it has higher stiffness and rigidity and can resist slightly higher bending moments. When there is no space constraint, then for the same mass, the hollow shaft is better than the solid shaft.
What is meant by hollow shaft?
The hollow shaft constitutes an essential component of the hollow shaft motor, which is used in electrically powered vehicles, such as trains. Hollow shafts are also suitable for the construction of jigs and fixtures as well as automatic machines.
How hollow shafts are manufactured?
Hollow shaft is manufactured by defining a through hole axially in a shaft blank to produce a cylindrical hollow shaft blank, inserting a mandrel in the through hole of the hollow shaft blank, holding opposite ends of the mandrel concentrically with the through hole, and rotating the hollow shaft blank about its own …
Which material is used for maximum shear stress theory?
Ductile material
4.6
| Theory | Suitable Material |
|---|---|
| Maximum Shear Stress Theory Or Guest & Tresca’s Theory | Ductile material |
| Maximum Strain Energy Theory Or Haigh and Beltrami Theory | Ductile material |
| Maximum Shear Strain Energy Theory Or Distortion Energy Theory Or Von Mises Henky Theory | Ductile material |
When two shafts one of which is hollow are of the same length and transmit equal torques with equal maximum stress then they should have equal?
If two shafts of the same length, one of which is hollow, transmit equal torque and have equal maximum stress, then they should have equal. Polar moment of inertia.
Which is stronger between hollow cylinder over solid cylinder of same strength?
Strength to weight ratio is better for a hollow pipe than a solid rod.” This means a hollow cylinder is stronger than a rod of equal mass and the same material. A hollow cylinder with a bigger inside diameter is better. In the limit x→1 the hollow cylinder is twice as strong.
Which of the following is true for hollow shaft in comparison with solid shaft?
Explanation: Hollow shaft is more stiff. 11. The strength of hollow shaft is more than the strength of solid shaft of same weight.
What is the shear stress in hollow shafts?
Average shear stress [ (Min. Shear stress + Max. Shear Stress))/ 2 ] in a hollow shaft will be higher compared to a solid shaft and its value is closer to the maximum shear stress. Hollow shaft has a greater strength to weight ratio. Wall Thickness: If we reduce the wall thickness, then there are chances of wrinkling or buckling of the shaft wall.
What is the difference between solid shafts and hollow shafts?
Hollow shafts are much better to take torsional loads compared to solid shafts. As shown in the figure, shear stress in a “shaft subjected to torsion” varies linearly from zero at the center to the maximum at the boundary.
Why are hollow shafts stiffer in torsion?
The hollow shaft will have the same material at a greater distance from the axis, so it will be much stiffer in torsion. The shear stress times cross-sectional area times the distance from the center is what resists your applied torque. So with a larger radius, the stress is less.
How do you calculate torsional stress in a shaft?
Remember, the torsional stress in a shaft is calculated by T (tau) = Tc/J, where, T = torque or load kN, kip; c= outside radius, J = polar moment of inertia, Pi (D^4)/32. Note that the torsional stress is inversely proportional to the polar moment of inertia, which is a pure function of the geometry, the diameter.