Question

Example 9.1 A structural steel rod has a
radius of 10 mm and a length of 1,0 m. A
100 kN foree stretches it along its length,
Calculate (a) stress, (b) elongation, and fe)
strain on the rod. Young's modulus, of
structural steel is 2.0 x 10" Nm,​

Answer 1

Answer:

I hope it is helpful for u

Answer 2

Answer:

stress = force / area

Area on which force acted = (pi * d^2) / 4

where , d = diameter of rod

(a) stress = (100 x 1000) / (( pi * 10^2 )/4)

= 1273.23 N/mm^2

E = stress / strain

strain. = change in length / original length

therefore, (b) change in length (ie., Elongation)

= stress x original length / E

= (1273.23 x 1000) / ( 2 x 10^5)

= 6.366 mm

(c) percentage of elongation

= (6.366 / 1000) x 100

= 0.63 %