engineering recuitment AAI JE Technical Mock Test 2020-21 Strength of Materials Simple Stress and Strain Thermal Stress and Strain
A steel plate of side ‘a’ (2-D) is enclosed in closely fitting rigid support as shown. Assume friction between plate and support is zero. Determine the expansion in the X-direction of the plate due to heating by ΔT – (Poisson's ratio is μ & thermal co-efficient is α)
1
aαΔT
2
μaαΔT
3
aαΔT(1 + μ)
4
aαΔT(1 + 2μ)