The horizontal steel rod, 2.5 m long and 1200 mm2 in crosssectional area, is secured between two walls as. If  the rod is stress-free at 20_C, compute the stress when the  temperature has dropped to _20_C. Assume that (1) the walls do not  move and (2) the walls move together a distance Δ = 0.5 mm. Use α =  11.7x10-6 oC and E = 200 GPa.

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Thermal Properties of Materials

In mechanical engineering, the thermal property is represented as the physical quantity that is relevant to the application of heat. The thermal properties are evaluated by variations in any specific material due to low heat or high heat. The quantities that influence the thermal property of the materials are mass, density, temperature, and many others.