What is twisting moment?

Q.  A member subjected to couple produces rotational motion about its longitudinal axis called as ________
- Published on 23 Sep 15

a. torsion
b. twisting moment
c. both a. and b.
d. none of the above

ANSWER: both a. and b.


  • Vbs   -Posted on 17 Sep 17
    thank You for good information
  • Sravanthi   -Posted on 25 Nov 15
    - The twisting of an object due to an applied torque is called as torsion or twisting moment.

    - Rotational motion about longitudinal axis is produced when a member is subjected to couple.

    - For shafts of uniform cross-section, the formula used to calculate torsion is

    The relation ( T/J = Gθ/L = τ/ R) is called as torsion formula.


    T is the twisting moment
    J is the polar moment of inertia
    G is the modulus of rigidity
    θ is the angle of twist (radian)
    τ is the shear stress
    R is the shaft radius

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