Stress in cross section of shaft at centre is zero

Q.  Stress in the cross section of a shaft at the centre ________
- Published on 21 Sep 15

a. is zero
b. decreases linearly to the maximum value of at outer surface
c. both a. and b.
d. none of the above

ANSWER: is zero

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    Discussion

  • Sravanthi   -Posted on 25 Nov 15
    Hollow shaft:

    - In hollow shaft, shear stress is zero at the centre. It increases linearly from zero to maximum value on the outer surface. Here, better utilization of strength is possible and hence is economical than solid shafts.

    Solid shaft:

    - Solid shaft is less economical as strength of the material is not completely utilized. Shear stress is minimum at the centre and is maximum at the outer surface.

    - But when weight of hollow and solid shaft is compared, it is observed that maximum shear stress is same for both the shafts.

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