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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

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    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.
     
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