Question:-
A link is under a pull which lies, on one of the faces as shown in the above figure. The magnitude of maximum compressive stress in the line would be
Option (A)
21.3 N/mm2
Option (B)
16.0 N/mm2
Option(C)
10.7 N/mm2
Option(D)
zero
Correct Option:
(C)
Question Solution:
Since 4kN force is will produce bending and direct tensile stress
s = (M.y/I) = {(4 x 103 x 25 x 25) / (1/12) x 15 x 503)} = 16N/mm2
Bending stresses are tensile and compressive also. The effect are:

\ s(tensile) = sb(tensile) + sdirect
s(compressive) = sb(comp) + sdirect
= 16 –{(4 x 103) / (50 x 15)} = 10.7N/mm2
question-answer-faq-9275