Civil Engineering - Strength of Materials - Discussion


The maximum twisting moment a shaft can resist, is the product of the permissible shear stress and

[A]. moment of inertia
[B]. polar moment of inertia
[C]. polar modulus
[D]. modulus of rigidly.

Answer: Option C


No answer description available for this question.

Pradhyumna said: (Oct 6, 2013)  
By applying torsion equation,
Tau/R = T/Polar moment of inertia = C theta/L.

Mayuri said: (Dec 31, 2014)  
t/j = q/r.
t = q*j/r.
But j/r = z.
i.e polar modulus.

Dhrubajyoti Ray said: (Oct 4, 2015)  
Please show me the whole torsion derivation in details.

Krishna said: (May 12, 2016)  
T/J = G0/L = t/r.

Therefore T = t*J/r.

J/r is the polar modulus.

Roy said: (Sep 11, 2017)  
For Bending moment it is, section modulus and for twisting moment it is polar modulus.

Siddharth said: (Apr 15, 2021)  
Z*q = Polar modulus
where z= j/r.

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