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vishal raj

· started a discussion

· 1 Months ago

In torsion equation what is R (Question: 319072.0 )

Here R is the radius of shaft, while J is the polar modulus.

Question:

In the torsion equation  TJ=Gql=tR     the term J/R is called

Options:
A)

shear modulus

B)

section modulus

C)

polar modulus

D)

none of these

 

Solution:

Ans: (c)

Knowledge Expert

· commented

· 1 Months ago

Dear student,
Given answer is correct,
The torsion equation for circular members is as follows:
G phi / L = T / J = t / r

where
G = shear modulus
phi = angle of twist of the cross-section
L = length of the member
T = twisting moment
J = polar moment of inertia
t = shear stress at a given location
r = radial distance at that location

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