Why a hollow shaft is stronger than solid shaft?

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 is a hollow shaft stronger than a solid shaft of same mass and material?

A hollow shaft is found to be stronger than a solid shaft made of equal material because the torque required to produce a given twist in hollow cylinder is greater than that required to produce in solid cylinder of same length and material through same angle.

Why is a hollow cylinder stronger than a solid cylinder?

Explanation: The hollow shafts can withstand the same stress as that of solid shafts. Strength to weight ratio is better for ahollow pipe than a solid rod. This means a hollow cylinder is stronger than a rod of equal mass and the same material.

Which should be able resist more torque a solid bar or hollow bar of the same material and cross sectional area?

4 Answers. A solid rod will be stiffer (both in torsion and in bending) than a hollow rod of the same diameter. But it won’t be much stiffer because almost all the stiffness comes from the outer layers of the rod (this is what the whole second-moment-of-area thing is about).

Why are hollow shafts preferred to solid shaft for transmitting torque deduce mathematically?

The hollow shaft’s diameter is larger than the solid shaft and takes more space. Hollow shafts have a more polar moment of inertia, so they can transfer more torque compared to solid shafts.

Why is a hollow rod stronger?

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.

What is 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.

Is hollow tube stronger than solid?

Fact is, given the same material, a solid rod is stronger in all respects than a hollow tube of the same material. solid and weigh less.

Why hollow cylinders are used in shafts?

A hollow shaft is found to be stronger than a solid shaft made of the same size and material. Reason: The torque required to produce a given twist in a hollow cylinder is greater than that required to twist a solid cylinder of the same size and material.

Which is stronger a solid steel rod or a hollow steel pipe?

Fact is, given the same material, a solid rod is stronger in all respects than a hollow tube of the same material. You can see a 1.25-inch tube with 0.120-inch wall has relative deflection strength greater than a 1-inch solid rod of the same material, but is only a bit over half the weight of the solid rod.

What are the advantages of hollow shafts over solid shafts?

The natural frequency of hollow shaft is higher than the solid shaft with same weight. Hollow shafts are having more polar moment of inertia, thus they can transmit more torque compared to solid shafts.

What is the internal diameter of a hollow shaft?

So for a given quantity of material, you can do, say, a 2 cm diameter solid shaft (material surface: 3.14 cm2) or a 4 cm outer diameter hollow shaft with an internal diameter of 3.46 cm (approx 2.7 mm wall thickness, same material surface: 3.14 cm2, so same weight per length unit.)

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.

Why is the weight of a circular shaft reduced by 40\%?

If the weight of shaft is reduced by 40\% the strength will only reduce by 16\%. The obvious reason is material is saved and thus weight is less and therefore cost is less and We also don’t have to worry much about its strength. Thus for a solid circular shaft k=0 .