A steel rod, 100 mm long is held between two rigid supports. It is heated by 20°C. If the coefficient of thermal expansion of the material of the rod is 15 x 10-6 /° C and modulus of elasticity is 200 x 103 MN/m2, what is the stress in the rod ?
A. 20 MN/m2 B. 40 MN/m2 C. 60 MN/m2 D. 80 MN/m2
Answers
Answered by
1
Stress = Y * strain = Y * ΔL / L = Y * α * L * ΔT / L
= Y * α * ΔT = 200 * 10^9 * 15 * 10^-6 * 20 = 6 * 10^7 N/m²
answer is C
= Y * α * ΔT = 200 * 10^9 * 15 * 10^-6 * 20 = 6 * 10^7 N/m²
answer is C
Answered by
0
(C) is correct answer
Similar questions