engineering recuitment AAI JE Technical Mock Test 2020-21 Strength of Materials Simple Stress and Strain Axial Elongation of Bar
A rod of length L having uniform cross-sectional area A is subjected to a tensile force P as shown in the figure below. If the Young’s modulus of the material varies linearly from E1 to E2 along the length of the rod, the normal stress developed at the section-SS is
1
P/A
2
\(\frac{{P\left( {{E_1} - {E_2}} \right)}}{{A\left( {{E_1} + {E_2}} \right)}}\)
3
\(\frac{{P{E_2}}}{{A{E_1}}}\)
4
\(\frac{{P{E_1}}}{{A{E_2}}}\)