Mechanical Engineering - Strength of Materials - Discussion
Discussion Forum : Strength of Materials - Section 7 (Q.No. 3)
3.
Two shafts 'A' and 'B' are made of same material. The shaft 'A' is of diameter D and shaft 'B' is of diameter D/2. The strength of shaft 'B' is __________ as that of shaft 'A'
Discussion:
12 comments Page 2 of 2.
Manjunath said:
5 years ago
T1= τ*z= pi*d^3/12.
T2= τ*z=pi*(d/2)^3/12= 1/8*T1.
T2= τ*z=pi*(d/2)^3/12= 1/8*T1.
MUHAMMAD NABI said:
4 years ago
As we know, the strength of the shaft is measured by polar modulus.
Polor modulus = j/r.
Here solid shaft is given so for solid shaft.
π/16 (d) ^3.
Now as db =d/2.
And da=d.
So,
π/16 (db) ^3 divide by pi/16 (da) ^3.
After a cancellation we get.
(db/da) ^3.
Put db= (d/2) ^3=d^3/2^3=d^3/8.
Now.
(d^3/8) /d^3.
=1/8.
Polor modulus = j/r.
Here solid shaft is given so for solid shaft.
π/16 (d) ^3.
Now as db =d/2.
And da=d.
So,
π/16 (db) ^3 divide by pi/16 (da) ^3.
After a cancellation we get.
(db/da) ^3.
Put db= (d/2) ^3=d^3/2^3=d^3/8.
Now.
(d^3/8) /d^3.
=1/8.
(1)
Post your comments here:
Quick links
Quantitative Aptitude
Verbal (English)
Reasoning
Programming
Interview
Placement Papers