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Mechanical and structural analysis miscellaneous

Mechanics and Structural Analysis

  1. A hollow circular shaft has an outer diameter of 100 mm and a wall thickness of 25 mm. The allowable shear stress in the shaft is 125 MPa. The maximum torque the shaft can transmit is
    1. 46 kN m
    2. 24.5 kN m
    3. 23 kN m
    4. 11.5 kN m
Correct Option: C

α1 = 100 - 2t
= 100 – 2 × 25 = 50 mm

τ
=
τ
RJ

J =
π
(1004 - 50)4
32

= 9203884.727 mm4
R = d0/2 = 100/2 = 50 mm
Tmax =
τmax × J
k

=
125 × 9203884.727
= 23 kNm
50



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