1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: Compound shaft-axial force,internal force

  1. Nov 9, 2005 #1
    There is a compound solid shaft. Outer shaft is made of material A and inner shaft is made of material B. One end of the shaft is fixed and another end has a force of F.

    Will the internal force in each of the shaft members vary? why. If i pull with a force F, I think the internal force F will be same each of the solid members.

    Similarly if a torque is applied at one end and the other end is fixed, will the internal torque differ in the two shafts
     
  2. jcsd
  3. Nov 10, 2005 #2

    Astronuc

    User Avatar
    Staff Emeritus
    Science Advisor

    The stiffer material will bear greater load.

    In a compound shaft, the displacements of the different materials are equal.

    In the case of a torque, the shear stresses will also be different. For one, the torsional stress at radius r is given by,

    [tex]\tau\,=\,\frac{Tr}{J}[/tex]

    where T is applied Torque, r is radius and J is torsional moment of inertia.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook