Why solid cylinder is more easily twisted than hollow cylinder?
Answers
Answered by
13
The angular stiffness of a hollow shaft that has a hole half the diameter through it is about 94% of a solid shaft (not more) but it has a mass of only 75 %.
This means that you can use a thinner wall on a larger tube shaft that still weighs less and costs less to make.
Oddly enough the moment of inertia is reduced by the same amount as the torsional stiffness so making a shaft hollow does not allow you to accelerate it faster for the same stiffness/strength.
This means that you can use a thinner wall on a larger tube shaft that still weighs less and costs less to make.
Oddly enough the moment of inertia is reduced by the same amount as the torsional stiffness so making a shaft hollow does not allow you to accelerate it faster for the same stiffness/strength.
Similar questions